Question about 1998 Toyota Tacoma

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Rebuilt a toyota 2.7 engine. Went to adjust the valves after a short break in period and when I startedwith the feeler gauges I noticed that 3 exhaust valces and 2 intake valves appear to be stuck the shims and buckets are nowhere near the cam lobes. What's up?

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Posted on Jan 02, 2017

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emissionwiz
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SOURCE: noisy cylinder head

These valves are not adjustable, they are hydraulic design. If they are noisy then there is a problem with the followers.

Posted on Oct 14, 2008

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SOURCE: 1983 toyota 22r/2.4 had head

Hi, I dont think that neither will cause the valves to get bend ,if the cam is 180 degrees out piston 1 and 4 are up at the same time,so if the timing chain is on the marks , pistons should not hit the valves,I think the timing chain was out one or more teth the first time you try to start the angine..C1

Posted on Dec 01, 2008

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SOURCE: 1998 4cyl.camry had a stuck valae due to bad

simple to figure that out . the key ways are always up on camshafts. it allows for them not to fall out when assembling the engine . so use the balancer to determine tdc (top dead center on cyl one) and make sure both keys are straight up . (just loosen the cam retainer nuts and look to see what set of marks they line up with and dont forget t re-torque them to factory specs somewhere between 22 and 28 ft lbs but not a lot more) , google the specs up to be sure

Posted on Oct 29, 2009

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Suzman
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SOURCE: are valve clearances on a

Shim and bucket.

Posted on Apr 29, 2011

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1985toyota celica gt22rengine valve adjustment


You need a feeler gauge and a socket on the Crank. Rotate until the Lash is out of the Cam (NOT LIFTED and install the Feeler Gauge and loosen and then tighten to be within spec. You will need to rotate the engine a few times and keep track of the ones you do.

Feb 24, 2015 | 1985 Toyota Celica

1 Answer

How do I diagnose a clicking noise coming from the top part of the engine?


First find where it is coming from. Most likely from the valve covers. Just wear and tear on the components. I believe Toyota has adjustable valves. You'll have to remove the valve covers. The rockers arms will have a screw with a nut on the top of them. Loose the nut and adjust the screw down. This has to be done with each cylinder at top dead center. You will need feeler gauges. The gap is small. 3 to 7 thousandths. I don't have the exact numbers. The intake and exhaust valves are different measurements.

Oct 24, 2014 | 2005 Toyota Sienna LE

1 Answer

I own 95 toyota 4runner. I would like to check.and adjust the valves. Will someone walk me thru the right way of doing this?Thank you.


First of all you will need a decent set of tools. depth feeler gauges, a workshop manual with the valve clearances, and a method of turning the engine by hand. You will need to take off the valve covers. After this you can check each of the valves for clearance by sliding the feeler gauges into the gap between rocker-arm or cam lobe and valve or tappet. Trick is you can only do this when the engine is in the correct position, so consult the manual and rotate the engine by hand accordingly. Remove the spark plugs to make rotating the engine easier. Adjust the tappet to gain the proper clearance as documented in the workshop manual. The feeler gauge should drag just slightly as you slide it out or slide it in. In ideal conditions I would guess this is about a 2~3 hour job, assuming ideal conditions, and not too much stuff in your way that will need to be moved. If your working at home, those are not ideal conditions.

For the record I've only done this sort of job on motorcycles, so I've never actually adjusted tappets. The theory is the same though.

Oct 22, 2014 | Cars & Trucks

1 Answer

When replacing the throttle position sensor is there a reset procedure after installing the sensor? this is on a 1998 mazda 626 4 cyl. I installed the new tps and the problem still occuring. The engine...


There is an adjustment to be made. Loosen the bolts and adjust the rotation until the specs are met.
MX-3 with 1.6L DOHC and 626/MX-6/Probe with 2.0L Engine
MANUAL TRANSAXLE
  1. Detach the connector from the throttle position sensor.
  2. Connect an ohmmeter between terminals IDL and E.
  3. Insert a 0.004 in. (0.1mm) feeler gauge between the throttle stop screw and stop lever.
  4. Verify there is continuity between terminals IDL and E.
  5. Then replace the feeler gauge with a 0.027 in. (0.7mm) feeler gauge, verify there is no continuity between terminals IDL and E
  6. Then open the throttle wide and verify there is no continuity again between terminals IDL and E.
  7. Next, connect the ohmmeter between terminals POW and E.
  8. Insert a 0.004 in. (0.1mm) feeler gauge between the throttle stop screw and stop lever.
  9. Verify there is no continuity between terminals POW and E.
  10. Then replace the feeler gauge with 0.027 in (0.7mm), verify there is no continuity between terminals POW and E.
  11. Then open the throttle wide and verify there is continuity between terminals POW and E.
  12. If not as specified, adjust or replace the throttle
AUTOMATIC TRANSAXLE
  1. Detach the connector from the throttle position sensor.
  2. Connect an ohmmeter between the terminals IDL and E.
  3. Insert a 0.004 in. (0.1mm) feeler gauge between the throttle stop screw and stop lever.
  4. Verify there is continuity between terminals IDL and E.
  5. Insert a 0.024 in. (0.6mm) feeler gauge between the throttle stop screw and stop lever.
  6. Verify there is no continuity between terminals IDL and E.
  7. Connect an ohmmeter to the throttle sensor terminals Vt and E.
  8. Verify that resistance increases as throttle valve opening increase.
  9. With throttle valve fully closed the resistance should be below 1 kilohm and as throttle valve is fully opened resistance should increase to approximately 5 kohms.
  10. If not as specified, adjust or replace the throttle sensor.

Jul 15, 2017 | 1998 Mazda 626

1 Answer

There is a tapping noise in the motor but its not knocking I think its a lifter it hasent lost any power and its really not getting worse I would like to know what the spec is for tighing down the lifter...


Depends on which engine you have. If you have


ADJUSTMENT Although it is sometimes possible to reuse an old cylinder head cover gasket, in most cases it makes more sense to purchase a new one before beginning the procedure. Some vehicles may require the use of silicone sealant either with or without a new cover gasket. For more details, please refer to the cylinder head cover procedures in Engine & Engine Overhaul of this repair guide and refer to the gasket manufacturer's instructions.

Z24i Engine
See Figures 1, 2 and 3
For the intake valves: 1-4-5-8 valve clearance is 0.012 in. (0.30mm). For the exhaust valves: 2-3-6-7 valve clearance is 0.012 in. (0.30mm). The pivot locknut torque specification is 12-16 ft. lbs. (16-22 Nm).

  1. The valves must be adjusted with the engine warm, so start the truck and run the engine until the needle on the temperature gauge reaches the middle setting. After the engine is warm, shut it off.
  2. Note the location of any wires and hoses which may interfere with cylinder head cover removal, disconnect them and move them to one side. Remove the bolts holding the cylinder head cover in place and remove the cover. Remember, the engine will be hot, so be careful!

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Fig. Fig. 1: Check the valve clearance with a flat feeler gauge-Z24i engine





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Fig. Fig. 2: Loosen the locknut and turn the adjusting screw to adjust the valve clearance-Z24i engine


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Fig. Fig. 3: With the No. 1 piston at TDC, adjust the top set of valves FIRST; with the No. 4 piston at TDC, adjust the bottom set of valves SECOND-Z24i engine

  1. Rotate the crankshaft until the timing marks indicate that the No. 1 piston is at TDC of the compression stroke. If you're not sure of which stroke you're on, remove the No. 1 spark plug and hold your thumb over the hole. Pressure will be felt as the piston starts up on the compression stroke.
  2. Refer to the accompanying illustration (upper part), then check valves (1), (2), (4) and (6) using a flat bladed feeler gauge. The feeler gauge should pass between the valve stem end and the rocker arm screw with a very slight drag. Insert the feeler gauge straight, not at an angle.
  3. If the clearance is not within the specified value, loosen the rocker arm lock nut and turn the rocker arm screw to obtain the proper clearance. After correct clearance is obtained, tighten the locknut.
  4. Rotate the crankshaft until the timing marks indicate that the No. 4 piston is at TDC of the compression stroke. If you're not sure of which stroke you're on, remove the No. 4 spark plug and hold your thumb over the hole. Pressure will be felt as the piston starts up on the compression stroke.
  5. See the illustration (lower part), then check valves (3), (5), (7) and (8). Check and adjust valve clearance as necessary.
  6. Install the cylinder head cover gasket, the cover itself and any wires or hoses which were removed. Check the engine oil level.

KA24E, VG30i and VG30E Engines
See Figures 4 and 5
These models utilize hydraulic valve lifters. Periodic adjustment is neither necessary or possible. There is however a bleed down procedure that is necessary when the valve train has been disassembled.
HYDRAULIC LIFTER BLEED DOWN
  1. Remove the cylinder head cover.
  2. Check the lifters for proper operation by pushing hard on each lifter with fingertip pressure.
  3. If the valve lifter moves more than 0.04 in. (1mm), air may be inside it. Make sure the rocker arm is not on the cam lobe when making this check.
  4. Install the cylinder head cover.
  5. If there was air in the lifters, bleed the air by running the engine at 1000 rpm for 10 minutes.


4df22a2.gif


Fig. Fig. 4: Cross-sectional view of an installed hydraulic valve lifter-4 cylinder engine


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Fig. Fig. 5: Cross-sectional view of an installed hydraulic valve lifter-6 cylinder engine

Oct 29, 2010 | 1989 Nissan Hardbody King

2 Answers

Procedure of tappet adjustment


make sure engine is warmed up. Put cylinder one at top dead center,remove the valve cover,loosen all adjustment lock nuts,adust intake and exhaust valves on cyl #1 and intake valve on #2 and exhaust valve on #3. now rotate crankshaft 360 degrees clockwise, now adjust intake valves on cyl#3 and cyl #4 and exhaust valves on cyl #2 and cyl #4.now tighten lock nuts and install valve cover. specs are intake valves 25mm clearance and exhaust 28mm clearance, use a feeler gauge,heres a picture to show you where to check clearance.7675a52.gif

Mar 14, 2010 | 1986 Suzuki Samurai

1 Answer

I did a valve adjustment and now it wont start


You adjusted the valves too tight. Back off of the adjustment before you break parts. You Have to set the rocker arm clearance when the engine is cold. (Not warm, not hot)

Use a feeler gauge.
The clearance for the Intake valves is .007 to .009. (7 to 9 thousandths)
The clearance for the Exhaust valves is .009 to .011 (9 to 11 thousandths)
You want a slight drag when you pull the feeler gauge through. This technique takes a certain amount of 'Feel'.

Jul 31, 2009 | 1999 Honda Civic

3 Answers

Hoa do i rebuild my motor


You buy a remanufactured short block and have your heads done.

Jul 20, 2009 | 1991 Isuzu Pickup

1 Answer

Noisy cylinder head


These valves are not adjustable, they are hydraulic design. If they are noisy then there is a problem with the followers.

Oct 14, 2008 | 2003 Toyota Corolla

2 Answers

New rebuild chatters


adjust your valves your oil pickup tube needs to be adjusted you need feeler guages to adjust the valves down properly
make sure lifters and oil pick up tubes are not clogged

feeler guage is---> thin pieces of metal cut to different sizes to hold under valve adjusters till the play and chatter gone
check by book what the feeler size needed for adjustment

Jun 07, 2008 | 1983 Chevrolet C3500

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