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How can I clean my valves without removing head covers?

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Why do you want to clean them? If it's because of a mechanical issue, you will need to remove the head to perform any meaningful cleaning. You can run some fuel system cleaner through the gas tank if all you wanna do is lite cleaning and prevention.

Posted on Jul 09, 2013

  • christopher prera Jul 09, 2013

    Okay here is the entire picture. Someone told me I'm only running on 7 I guess he could tell by the sound. I told him the tail pipe also pops while on the freeway. Then he said " oh yeah might be a valves not opening" but then some else told me I'm sucking in unwanted air. So I really don't know what to do. The major problem is the tail pipe popping. Other than that she runs straight and true. 1996 chevy suburban. 4x4 k1500 5.7L. Vortec cold air intake.

  • tomcleveland Jul 09, 2013

    Popping can have several causes such as valves not operating properly due to carbon build up, warn cam shaft, warn timing set, warn spark plugs. The best way to determine internal engine problems such as cam, valves, timing set and so on, is with a compression tester and a leak down tester. The compression tester will help identify the cylinder with trouble. The leak down tester helps identify the type of trouble. Remove one spark plug at at a time and install the compression tester, remove power to the coil and fuel pump, then crank the engine for three seconds, note the pressure displayed on the compression tester, then repeat this process for every cylinder. Look for a 20% or greater difference in the results, the cylinder with the largest variance is the one you should focus on. If they are all close and one doesn't stand out then you should be in good shape mechanically. I would also suggest that you change the spark plugs at this time because they will be removed to perform the compression test. I hope this helps, I will attach a picture of a tipical compression tester you can purchase for around $20 at your local parts store.

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Replace valve cover gaskets


Remove bolts for valve covers. Remove cand clean covers. Remove and clean old gasket from heads. Use gasket shelack to place new gaskets into place(easier to place on the covers) Reinstall valve covers with gaskets in place. Reinstall bolts. Done.

Jun 12, 2014 | Vehicle Parts & Accessories

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Simple steps to replace the Valve Cover Gaskets on a Jaguar XJ8?


Replace the valve cover gasket if the valve cover gaskets are leaking or if they're worn. The procedure is as follows:--
1)First carefully remove the nuts holding the valve cover to the engine head.2
2)Then pull the valve cover off from the engine head .
3)You can use flat-tip screwdriver to remove the valve cover.
4)It will be very dirty inside so you will have to clean the mating surfaces on both the engine head and the valve cover.
5)Take your time and clean it completely.

6)You can use a bead of RTV sealant on both mating surfaces.

7)Then carefully seat the gasket to top of the engine head.
8)The gasket can only be fitted in one way. So fit it properely.
9)Then tightly Press the valve cover to the gasket
10)And tighten the valve cover nuts secure.

This will help.Good Luck.

on Mar 10, 2010 | Jaguar XJ8 Cars & Trucks

1 Answer

Need to remove valve cover on 2000 Camry Toyota


For the four cylinder engine:

  1. Remove and label all electrical wiring, connectors and vacuum hoses necessary to gain removal clearance.
  2. Remove the spark plug wires. Disconnect the PCV hose.
  3. Remove the four nuts and grommets located on top of the cylinder head cover.
  1. Remove the cylinder head cover and the cover gasket from the cylinder head.
  2. Discard the gasket and replace with a new one.
To install:
  1. With a wire brush or gasket scraper, remove all the old gasket material from the cylinder head and the cylinder head cover gasket surfaces.
  2. When the cylinder head surfaces are free and clean, apply beads of sealant to the cylinder head in the locations shown in the accompanying illustrations.
  3. Install the new cylinder head gasket in the cover. Make sure that the gasket seats evenly.
  4. Place the cylinder head cover with the gasket onto the cylinder head.
  5. Install the four grommets and nuts. Uniformly tighten the nuts in several passes to 17 ft. lbs. (23 Nm).
  6. Connect the PCV hose. Connect all removed vacuum hoses, connectors and electrical wiring. Connect the negative battery cable.
  7. Start the engine and inspect for oil leaks.
  8. Repair any leaks as necessary.
For the V-6 (3.0L) engine:
  1. Drain and recycle the engine coolant.
  2. Disconnect the radiator inlet hose.
  3. Disconnect the throttle and accelerator cables.
  4. Remove the air cleaner cap assembly.
  5. Remove the V-bank cover. Use a hexagon wrench to loosen the nuts.
  6. Label and remove all emission control valve hoses. Disconnect any wiring interfering with the valve cover removal.
  7. Remove the air intake chamber. This will gain you access to the back valve cover.
  8. Disconnect the engine wire from the left hand side, No. 3 timing belt cover, rear side and right hand side. Most of the wiring is secured by nuts and or bolts to the body of the vehicle.
  9. Remove the ignition coils, make sure the place them in order on a table so not to mix them up.
  10. Remove the 8 bolts retaining the valve covers and gasket.
  11. Clean the mating area of the valve cover and cylinder heads well. If necessary, scrape any left gasket from either surface.
  12. Apply seal packing to the cylinder heads and place new gaskets into position.
  13. Attach the valve covers. Uniformly tighten the bolts in several passes to 69 inch lbs. (8 Nm).
  14. Install the spark plugs in their proper locations, then place the ignition coils into place and secure.
  15. Attach all engine wiring be sure to secure each harness properly.
  16. Install the air intake chamber. Refer to Fuel System .
  17. Attach all emission hoses and wiring.
  18. Attach the V-bank cover.

Apr 15, 2014 | 2000 Toyota Camry

2 Answers

Valve cover gasket, how to replace?


Rocker Arm (Valve) Cover REMOVAL & INSTALLATION 2.3L 4-Cylinder Engines
  1. Disconnect the negative battery cable.
  2. Label and remove the spark plug wires.
  3. Remove the attaching bolts for the valve cover.
  4. Remove the valve cover from the cylinder head. If necessary, lightly tap the valve cover with a soft hammer to aid in removal. To install:
  5. Thoroughly clean the valve cover and cylinder head gasket mating surfaces.
  6. Install the valve cover on the cylinder head using a new gasket.
  7. Tighten the valve cover bolts to 14 ft. lbs. (20 Nm) in a crisscross pattern.
  8. Install the spark plug wires.
  9. Connect the negative battery cable.
  10. Start the engine and check for leaks. Fig. 1: Valve cover and gasket assembly 90953g12.gif
2.8L 6-Cylinder Engine
  1. Disconnect the negative battery cable.
  2. The following steps are necessary if your car has A/C and if you are removing the passenger side valve cover, if you do not need to remove the passenger side valve cover, skip them.
    1. Remove the A/C compressor belt and the compressor from the mounting bracket located on the passenger side of the engine. Do not remove the lines from the compressor.
    2. Place the compressor with the lines attached on the passenger side front shock tower and secure.
    3. Remove the compressor bracket.
  3. Remove the air cleaner-to-throttle body hose.
  4. Label and remove all necessary electrical and vacuum connections.
  5. Remove the attaching bolts for the valve cover(s).
  6. Remove the valve cover(s) from the cylinder head(s). If necessary, lightly tap the valve cover with a soft hammer to aid in removal. To install:
  7. Thoroughly clean the valve cover(s) and cylinder head gasket mating surfaces.
  8. Install the valve cover(s) on the cylinder head(s) using new gaskets.
  9. Tighten the valve cover bolts to 11 ft. lbs. (15 Nm) in a crisscross pattern.
  10. Install all necessary electrical and vacuum connections.
  11. Install the air cleaner assembly.
  12. Install the A/C bracket (if removed).
  13. Install the A/C compressor and belt (if removed).
  14. Connect the negative battery cable.
  15. Start the engine and check for leaks.
2.3L and 2.4L 5-Cylinder, and 2.9L 6-Cylinder Engines The 2.3L and 2.4L 5-cylinder, and 2.9L 6-cylinder engines have a two-piece cylinder head, the upper half and the lower half. The upper half is basically the same as a valve cover, except that it incorporates the bearing caps for the camshafts into the underside.
  1. Disconnect the negative battery cable.
  2. Remove the spark plug access cover.
  3. Label and remove the ignition coils and vent hoses or the distributor cap and wires if equipped.
  4. Check the cam alignment before removing the cylinder head.
  5. Remove the bolts attaching the upper cylinder head.
  6. Remove the upper cylinder head, lightly tap with a soft hammer if necessary. To install:
  7. Thoroughly clean the upper and lower cylinder head gasket mating surfaces.
  8. Apply liquid sealing compound to the upper cylinder head mating surface. WARNING
    Use a roller or your finger to spread sealant, do not use an excessive amount of sealant, or the oil passages could become clogged.
  9. Place the upper cylinder head onto the lower cylinder head.
  10. Check the cam alignment before tightening the cylinder head.
  11. Install Volvo tool number 5454 or equivalent to the upper cylinder head.
  12. Tighten the nut on the tools to seat the upper cylinder head.
  13. Tighten the upper cylinder head bolts, beginning from the center out to 13 ft. lbs. (17 Nm).
  14. Install the ignition coils and hoses or the distributor cap and wires.
  15. Install the spark plug access cover.
  16. Connect the negative battery cable.
  17. Start the vehicle and check for leaks. Fig. 2: Remove the clamp and detach the vent hose 90953p66.jpg
    Fig. 3: Remove the spark plug cover and the plug wires or ignition coils to access the retaining bolts 90953p80.jpg
    Fig. 4: Remove the retaining bolts 90953p72.jpg
    Fig. 5: A light tap with a soft-faced hammer is usually required to loosen the valve cover 90953p81.jpg
    Fig. 6: Carefully lift the upper cylinder head up and off the lower section. Note the integral camshaft bearing caps in the casting 90953p82.jpg
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Jan 29, 2011 | 1999 Volvo S70

3 Answers

I have a loud ticking under my valve cover. 97 ford escort. I think its a loose valve but is it some thing i can fix. I know a little about cars. but not an expert


not a valve, but a lifter. I will paste procedure below. You judge if you can do it or not. Recommend you replace them all while you're in there. If you let this go, the lifter will wear out the camshaft. Lifters are $22 each, and you have 8 of them. You will also need a new valve cover gasket.
Please let me know if you have questions, and thanks for using FixYa.

2.0L Engine
SOHC engine
See Figures 6, 7, 8 and 9
  1. Disconnect the engine air cleaner-to-valve cover hose from the cover by compressing the hose clamp with pliers and sliding the clamp back, then separate the hose from the cover.
  2. Remove the spark plug wire separators from the valve cover and set the wire assemblies aside.
  3. Unfasten the three valve cover retaining bolts.
  4. Remove the valve cover and gasket from the cylinder head.
WARNING Do not use any abrasive grinding discs to remove gasket material. Use a plastic manual gasket scraper to remove the gasket residue. Be careful not to scratch or gouge the aluminum sealing surfaces when cleaning them.
  1. Remove the old gasket material from the cylinder head and valve cover mating surfaces.

jturcotte_163.jpg

Fig. Fig. 6: Remove the spark plug wire separators from the valve cover

jturcotte_164.jpg

Fig. Fig. 7: Compress the engine air cleaner-to-valve cover hose clamp with pliers, and slide the clamp back ...


jturcotte_165.jpg

Fig. Fig. 8: ... then disconnect the hose from the valve cover


jturcotte_166.jpg

Fig. Fig. 9: Unfasten the valve cover retainers and remove the valve cover-2.0L SOHC engine


If removing more than one valve lifter (tappet), mark the lifters and their locations as they must be installed in their original bores.

  1. Remove the rocker arm(s).
  2. Unfasten the lifter guide plate retainer.
  3. Remove the guide plate and the lifter.


To install:
  1. The oil feed hole in the lifter must face away from the oil feed hole in the cylinder head.
  2. Lubricate the lifter(s) with clean 5W-30 engine oil and install them in their original bores.

Make sure the lifter guide plate retainer tabs are towards the rear of the cylinder head, and the lifter guide plate tabs are towards the front of the cylinder head.
  1. Install the lifter guide plate and tighten the retainer.
  2. Install the rocker arms.
Do not use any sealer with a silicone type gasket.
  1. Install a new gasket and the valve cover.
  2. Install and tighten the valve cover retainers to 71-97 inch lbs. (8-11.5 Nm).
  3. Attach the spark plug wire separators to the cylinder head.
  4. Connect the engine air cleaner-to-valve cover hose and engage the hose clamp

Jan 19, 2011 | Ford Escort Cars & Trucks

2 Answers

Valve cover is leaking oil on my 2000 1.9 TDI Passat. Have changed the gasket but still leaking badly. Have been told to change whole cover but VW want £120,00 Any ideas?


will try to help.if it's only the valve cover leaking,i'm guessing they sold you the rubber one that says ne rtv sealant needed. take your back off, try not to break the rubber seal when removing!clean the top of head where gasket goes. clean the valve cover really good!clean the grooves out that the gasket slides into. buy some blue trv glue, apply a thin coat to top of head, let it setup while you apply another thin coat to valve cover, let set 10mins. apply gasket to valve cover making sure to push the gasket into the grooves on valve cover. don't worry about neatness. let the valve cover set on a hard surface with the gasket against the hard flat surface[such as a garage floor,or clean driveway] after10 more minutes install the valve cover,make sure and take your time. place valve cover onto motor,than hand start each bolt to insure thay are going into the prope bolt holes. after you have each bolt hand started, start at center of valve cover snugging the bolts down to motor. do not crank down or apply excessive force when tightening those bolts. you should see some of that blue rtv glue coming out around the valve cover when applying torque to the valve cover bolts. only secure them snug at first. let car set for 15mins. start car and look for leaks around the cover, do not over tighten those bolts but you may need to look for a leak, go to bolt closest to leak and turn it 1/4 at a time until leak stops. but if you do this step by step, you'll not have a leak issue. you may have pinched the gasket when you replaced it. hope this helps and thank you for choosing fixya.com

Dec 27, 2010 | Volkswagen Passat Cars & Trucks

1 Answer

HOW TO FIX A BLOWN HEAD GASKIT?


Buy a gasket kit for the upper end. Remove the valve cover intake and exhaust manifolds. Remove the head bolts. Remove head and clean up block from old gasket material. Take the head to a machinist and make sure that it is not warped. If it is warped either replace the head with a new one or have it machined true. Install new gasket and get torque specs with new head bolts and follow torque sequence using the correct torque specs. Clean exhaust, intake and valve cover of old gaskets. install new gaskets and torque according to specifications.

Nov 27, 2010 | 1993 Jeep Cherokee Country

6 Answers

I have a 2002 Nissan Altima 2.5L that is leaking oil into the spark plug tubes; can these seals be replaced or does the valve cover have to be replaced?


Yes, you need a Rocker cover (valve cover) Gasket kit. Remove the valve cover, remove all old O-rings and cover gasket, clean grooves and mating surfaces without gouging or scratching them, put the new gaskets on as per factory recommendations, tighten to the proper torque and you're done. The spark plug holes in the cover are part of the valve cover gasket kit. Any Napa, Car Quest, Pep Boys, Auto Zone will have it.

Oct 03, 2010 | 2002 Nissan Altima

1 Answer

How to change out valve cover gaskets on a 1989 Lincoln Town Car


This is All you need for this Repair, ALSO Be Sure ALL GASKET SURFACES ARE VERY CLEAN. This Engine Requires MORE than MOST ALL Engines do for this Repair.

REMOVAL

  1. To remove a valve rocker arm cover from the RH cylinder head, disconnect PCV closure tube from oil fill stand pipe at rocker cover.
  2. Remove the Thermactor bypass valve and air supply hoses as necessary to provide clearance.
  3. Disconnect the spark plug wires from the spark plugs using Spark Plug Wire Remover T74P-6666-A or equivalent. Do not pull on wire. Remove the wires and bracket assembly from the rocker arm cover attaching stud and position the wires out of the way. ALSO MARK THEM AS TO WHERE THEY CAME FROM !!!
  4. Remove upper intake manifold.
  5. Remove attaching bolts and remove the cover.
INSTALLATION

  1. Clean the valve rocker arm cover(s) and the cylinder head gasket surface(s). Position a new service valve rocker cover gasket.
  2. Position the cover(s) on the cylinder head(s). The cover is tightened in two steps. Tighten the bolts to 14-18 N.m (10-13 lb-ft). Two minutes later, tighten the bolts to the same specification.
  3. Install the crankcase ventilation tube in the RH cover.
  4. Install upper intake manifold.
  5. Install the spark plug wires and bracket assembly on the rocker arm cover attaching stud. Connect the spark plug wires. Install the air intake duct assembly.
  6. Install the Thermactor bypass valve and air supply hoses (if required).

Oct 03, 2009 | 1989 Lincoln Town Car

3 Answers

Replace Valve cover on 2002 Nissan Sentra


Are you sure the Valve Cover and not just the Valve cover gasket??
Any ways go to Auto Zone and pick up the Valve cover gasket, RTV Silicone selant, Gasket Scraper, and a can of Brake parts cleaner spray.
Disconnect the battery cable from the negative battery terminal, Remove the items which are in your way: Pull the spark plug wires off the spark plugs and remove them from their brackets, remove the PCV hoses, and remove the throttle cable from its brackets and position it out of the way.

Loosen the fasteners in this order, I believe there are 11 bolts holding the Valve cover down. Remove one bolt and count to the next 5th bolt and remove it and count to the next 5th bolt and remove it, do this till all the bolts have been removed on a circular pattern. Carefully remove the valve cover from the engine head.

If your just going to replace the Valve cover gasket,  Remove the gasket from the valve cover. Thoroughly clean the mating surfaces of the valve cover and the engine head. Use a gasket scraper to remove all traces of old gasket, and then use the Brake parts cleaner to clean any remaining oil from the surfaces.
If you bought a new Valve cover, Apply RTV silicone sealant to the gasket and engine head around the cutout areas of the valve cover. Note you still have to clean the heads on the engine. Lay the new gasket in the groove in the valve cover.  Reinstall the valve cover with its new gasket on the engine head. Tighten the bolts in the same order you removed it in. Do Not Over Tighten the Bolts that hold the Valve Cover down, you'll crush the new gasket and will get an oil leak.
Note: If the valve cover does not come off the engine head easily, use a block of wood and a hammer to bump it in an attempt to jar it loose. If absolutely necessary, you may slip a flexible putty knife between the head and the cover to break the seal.
If you purchased a valve cover gasket kit, don't forget to replace the small rectangular gasket and the spark plug seals as well while you have the valve cover off the car. You may buy some Brake cleaner to clean off all the oil which has leaked all over the engine. 
DO NOT attempt to pry the cover off the head using a screwdriver or chisel. Be very careful not to introduce foreign matter into the engine. If you get anything (dirt, metal shavings, bits of old gasket) into the engine. 
DO NOT over-tighten the valve cover fasteners. On the engine, the fasteners need only 17 to 34 in-lbs of torque.

Your A/C system has a leak in it. all system has a slow leak and common, You can get a re-charge kit at Auto Zone to save some money, but if your A/C needs charging again in 2 weeks or less then there is a larger leak due to a bad seal and is cheaper to have a A/C shop locate the leak and replace the seal that has gone bad.
Good luck and hope this help. keep me posted, be glad to help.


May 29, 2009 | 2002 Nissan Sentra

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