I have recently change my head gasket and all 16 valve stem seals. After refitting the head and experiencing a smoking engine, I have endevoured to find a solution. I have investigated some of the old valve stem seals removed and have compared them with new ones. I have found that there are some differences in the hole diameters. The original hole diameters measure 5mm were as the new measure 5.8mm. Also, Toyota used to supply two different seals, a green top for the exhaust and a brown top, but now supply just one, suggesting that there is very little difference?
Can anybody help here?
I am trying to solve a problem and with Toyota wanting £9.38 each, to commit to spending £150.08 on these seals is a little scary.
An expert who has achieved level 3 by getting 1000 points
An expert that got 20 achievements.
An expert that got 10 achievements.
An expert that got 5 achievements.
Re: Celica ST 1.8 Valve stem seals
When does it smoke? All of the time, or just when you start it? If it smokes all of the time, consider piston rings. If you have lots of smoke when first starting only, valve seals and possibly worn valve guides are the culprit.
a 6ya Mechanic can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repair professionals here in the US. click here to Talk to a Mechanic (only for users in the US for now) and get all the help you need. Goodluck!
- If you need clarification, ask it in the comment box above.
- Better answers use proper spelling and grammar.
- Provide details, support with references or personal experience.
Tell us some more! Your answer needs to include more details to help people.You can't post answers that contain an email address.Please enter a valid email address.The email address entered is already associated to an account.Login to postPlease use English characters only.
Tip: The max point reward for answering a question is 15.
when you are coasting , the inlet manifold vacuum can exceed 25 " mercury and that puts extra strain on the valve stem seals and rings
if they are failed or the valve stems guides are worn then the vacuum sucks oil past the seals and down the valve stems into the combustion chambers , resulting in the smoke when the system again fires up on acceleration
find an accrdited service center with experience on the make of car, have them do a compression test (wet and dry) to determine engine condition and if the rings prove a good compression , then they will be able to change the valve stem seals with out removing he head/s
get quotes first
White smoke means water(antifreeze) is getting into the combustion chamber. A bad intake or head gasket could b the problem but it should smoke all the time. Worn valve stem seals however will cause smoking on initial startup then quit, but the smoke will b light blue. If indeed smoke is white, pull spark plugs one at a time & look for heavy white crust on end of plug, if so that cylinder is getting water in it. Do that to all plugs. Re torquing head or manifold may help but if its high milage almost def need gasket. Heads warp also in that case the head must b milled flat. Valve stem seals can b replaced with head on in some cases by introducing air into cylinder to keep valve from falling into cylinder when keepers are removed. Hope this clears things up a lil.
white smoke indicates a coolant burning problem. most likely a head gasket and when it gets warmed up the expansion of the mating components seals off most of the leak. have a head gasket check done. burning of oil is a bluish colour not white.
black smoke --over fuelling, incomplete combustion
white smoke --too lean , water getting into the combustion chamber ( gasket)
blue smoke-- valve stem seal incorrectly fitted( old or worn,hard),oil ring failure, cylinder bore damaged, worn main/big end bearings overloading the oil ring,fauty pcv valve or EGR system
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!!
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.