Question about 1997 Nissan Sentra

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Can I fit valve stem seals without taking the head off on 1600 sentra 1997

Can I fit valve stem seals without taking the head off

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No you can't..
Fitting valve stem seals involves removing the valve springs. This means the valve has to be held in place by a valve spring compressor (bought from almost any spares outlet). The springs are compressed by placing one end of the compressor tool on the valve face and the other end over the spring cap, then squeezing the tool to compress the spring, then removing the split collets that hold the spring in place, removing the spring cap and spring, then eventually you have access to the stem seals.
The head has to be removed to accomplish all this.

Posted on Nov 21, 2014


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Posted on Jan 02, 2017

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SOURCE: nissan sentra 1.6 1980

Sounds like poor engine rebuilt work. The rings probably were not aligned properly. they need to be placed in their proper positions. The valves, guides, weak spings, etc. (Was your cylinder or head machined) Also you could have used incorrect rings-size. Keep looking online for manual guides

Posted on Nov 05, 2009

  • 2984 Answers

SOURCE: does the cam shaft on a 1987 sentra 1.3 E13S

Here's what the tech data says for installation:

To install:

  1. Slide the camshaft into the cylinder head carefully and then install a NEW oil seal.
  2. Install the cylinder head and rear timing belt cover.
  3. Set the camshaft so that the knockpin faces upward and then install the camshaft sprocket so its timing mark aligns with the one on the rear timing cover.
  4. Install the timing belt.
  5. Coat the rocker shaft and the interior of the rocker arm with engine oil. Install them so the punchmark on the shaft faces forward and the oil holes in the shaft face down. The cut-out in the center retainer on the shaft should face the exhaust manifold side of the engine.
  6. Make sure the valve adjusting screws are loosened and then tighten the shaft bolts to 13-15 ft. lbs. (18-20 Nm) in several stages, from the center out. The first and last mounting bolts should have a new bolt stopper installed.
  7. Adjust the valves and refill all fluid levels.
  8. Start engine, check timing and road test.

Posted on Jun 07, 2010

  • 8557 Answers

SOURCE: I need the timing set up for nissan sentra 16



Posted on Sep 22, 2010

SOURCE: Spark plugs filled with oil 2002 nissan sentra

I would buy a chiltons or Haynes manual for 10.00 dollars

Posted on May 15, 2012

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Black and blue smoke when cold start

Hey Anon..this is a serious problem ONLY if you do not keep your engine oil level full...but you do need to get it repaired as soon as you can..
Sounds like you may only need new valve stem seals...BUT.. you need to check and see if your car smokes when driving.. especially when you are stopped at a red light, then take off again...Does it smoke then.>??? >> THIS IS IMPORTANT!!... It determines whether its rings and/or valve stem seals.. If it smokes after a red light.. it could be rings and valve stem seals.. If it ONLY smokes in the morning.. its a 99% chance its just worn out valve stems seals...
Find a qualified professional (ASE Certified or Toyota Factory shop) ..This is NOT an inexpensive fix..BUT - ASK if they will replace the valve stems seals without removing the heads..( I KNOW they can..its just a matter of WILL they!?!?)...BUT....The shop will want to rework your head(s).. called a "valve job" and this is normal,-- they will remove the head(s), all the valves, regrind their sealing surface and regrind the valve seats in the heads, install new valve stem seals, new intake gaskets, new head gaskets, fresh antifreeze..(get a new -QUALITY- thermostat and have them install it - no need to chance overheating your engine), they should "surface the heads".. giving them a fresh gasket sealing surface.. this will restore the sealing surfaces and help with the compression, and I would recommend letting them do it if you can!!....if you do this -- MAKE SURE you ask/demand for ALL your old parts back,-- all of them!! Good luck,, please mark as/if helpful...thanks!!

Sep 10, 2017 | 2006 Toyota Camry 2.4

1 Answer

How difficult is it to replace valves in a 85 Toyota Pickup?

It can be done, but it is classified under the engine overhaul reconditioning, which can be time consuming and expensive for an engine machinist to do. To do it yourself is not usually recommended.--- REMOVAL & INSTALLATION A valve spring compressor is needed to remove the valves and springs; these are available at most auto parts and auto tool shops. A small magnet is very helpful for removing the keepers and spring seats. Set the head on its side on the bench. Install the spring compressor so that the fixed side of the tool is flat against the valve head in the combustion chamber, and the screw side is against the retainer. Slowly turn the screw in towards the head, compressing the spring. As the spring compresses, the keepers will be revealed; pick them off of the valve stem with the magnet as they are easily fumbled and lost. When the keepers are removed, back the screw out and remove the retainers and springs. Remove the compressor and pull the valves out of the head from the other side. Remove the valve seals by hand and remove the spring seats with the magnet. Fig. 1: After compressing the valve spring, be careful removing the keepers--they are easily fumbled 85783113.gif
Fig. 2: Always install new valve stem seals 85783114.gif
Fig. 3: Lightly tap each assembled valve stem to ensure correct fit of the keepers, retainer and seals 85783115.gif
Fig. 4: Special tool to remove the valve spring--you also need tool to hold valve up 85783273.jpg
Fig. 5: Removing the keepers with a magnet 85783274.jpg
Fig. 6: Removing the valve spring 85783275.jpg
Fig. 7: Removing the valve seal 85783276.jpg
Fig. 8: Installing the valve seal 85783277.jpg
Since it is very important that each valve and its spring, retainer, spring seat and keepers is reassembled in its original location, you must keep these parts in order. The best way to do this to cut either eight (four cylinder) or twelve (six cylinder) holes in a piece of heavy cardboard or wood. Label each hole with the cylinder number and either IN EXp>After lapping each valve into its seat (see Valve Lapping below), oil each valve stem, and install each valve into the head in the reverse order of removal, so that all parts except the keepers are assembled on the stem. Always use new valve stem seals. Install the spring compressor, and compress the retainer and spring until the keeper groove on the valve stem is fully revealed. Coat the groove with a wipe of grease (to hold the keepers until the retainer is released) and install both keepers, wide end up. Slowly back the screw of the compressor out until the spring retainer covers the keepers. Remove the tool. Lightly tap the end of each valve stem with a rubber hammer to ensure proper fit of the retainers and keepers. prev.gif next.gif

Dec 19, 2010 | 1985 Toyota Pickup

1 Answer

Need to replace valve stem seals on 99 excel 3 without taking head off

this is a dangerous exercise to do it this way if one of the valves fall into the cylinder the head has to come off,best idea take it of & do it properly in the first place......hope this helps....cheers

Aug 13, 2010 | Hyundai Excel Cars & Trucks

1 Answer

Can i change valve stem seals with out taking the head off

Yes,it is possible,by closing the valves in the cylinder you are working on,and using a air fitting,screwed into the cylinder spark plug hole,this will hold the valve up.

May 04, 2010 | 1994 Hyundai Excel

1 Answer

Oil consumption and black ezhaust mercedes 280e 1984,compressy ok,sometimes ONE bougie fouled.

Compressor is OK meaning your valves are still good. However the Valve- Stem seals need to be replaced. The seals have function to limit the lubricating oil amount the valve train. When they are worn out, too much of oil gets in to the valve area then get burnt out to the exhaust causing oil consumption. These valve can be replaced at a shop without taking the head off the engine. Although it sounds simple but not all the shop want to do this, since they want to take the head out to make more money. So check around until you find one. The work is to put air compressor at the spark plug location to hold a valve up so the valve-stem seal could be replaced from above. This will be repeated for every valve on the engine. Although not being an auto mechanic, I did on mine and fount it was at medium level of difficulty. Good luck.

Mar 14, 2010 | 1999 Mercedes-Benz E-Class

2 Answers

Engine light is on,the engine shakes/sputters but doesn't die(seems to want to though)especially when speed reaches 45 or over.changed spark plugs,found oil in that area(?)have began to smell gas(?) inside...

Had one of these a while ago in all honesty there not good vehicles thats being polite. How much oil was there? was it around the plugs or on the electrode part of the plug inside the head? if on the plug end then the valve stem oil seals have gone so you would need to take the head off and take the valves out fit the seals and then regrind the valves back correctly. Most likely it will cost about £450 as you will need a head gasket and bolts etc etc cam belt. thats if it is the valve stem oil seals.

Jan 13, 2010 | 1998 Kia Sportage

4 Answers

Replace valve stem oil seals

Make up an airline fitting that will screw into spark plug hole, or buy from autoparts , or tools supply place. You put compressed air in cylinder while changing, which holds valves in place.

Feb 21, 2009 | 2000 Hyundai Accent

3 Answers

WHAT'S LEAKING? Is it the valve stem seals or piston rings???

If it is the valve seals,you can replace the head,but it would be cheaper to replace the seals,If you pull the head,you can do a leak down test on the pistons to check the rings as well.

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Jan 23, 2009 | 2004 Ford Crown Victoria

1 Answer

Nissan sentra 1.6 1980

Sounds like poor engine rebuilt work. The rings probably were not aligned properly. they need to be placed in their proper positions. The valves, guides, weak spings, etc. (Was your cylinder or head machined) Also you could have used incorrect rings-size. Keep looking online for manual guides

Sep 04, 2008 | 1983 Nissan Sentra

2 Answers

1993 TOYOTA TERCEL 1500cc Valve Seals Replaced now smokes much worse

You either have had the wrong valve seals installed, they are physically missing, or the valves are incorrect (too loose in the guides/stem too thin). The rocker arm seals will not contribute to your issue. If it did not have the oil smoke before you took the head off, the issue is with whatever the machine shop did. Valve seals have to fit TIGHT, or oil will go down the valve stem into the intake.
Take the head back to the machine shop & tell them to fix it. For free.

Aug 23, 2008 | 1993 Toyota Tercel

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