Originally Posted by Lovetodrive2000
(Post 24423303)
Hope to get the car out in a few weeks, and hit some backroads to see if the Supra pcv valve has corrected the issue.
If not, will be trying a stock cat.... just need to find a S2000 parked on the street, or in a garage so I can borrow their cat! :LOL: |
If we ever get some dry, no salt 50's weather around here... can't wait to see if the PCV valve takes care of it.... :)
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Originally Posted by Lovetodrive2000
(Post 24443748)
If we ever get some dry, no salt 50's weather around here...
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Any news?Same exactly problem.Jdm f20c motor with 100k miles on it.Changed seals,guides but nothing happened.Compression test 225 all 4.It burns 1.5 qt per 3k miles with normal driving.I'm ordering penzoil platinum 10w30 to see if something is going to change(tryed the amsoil sgt 5w50 but didn't notice any dramatic change).The mechanic diagnosed "oval" cylinder walls when we took off the head for changing the valve guides.But my question is,why it isn't smoking if i drive it hard,or driving on the highway?Only at traffic situations and when i take off a traffic light or when decelarating for some time and then hitting the gas
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I'd say that the oil control rings are most likely stuck. You'd have to remove one piston to confirm.
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Originally Posted by nipponS2000
(Post 24458126)
Any news?Same exactly problem.Jdm f20c motor with 100k miles on it.Changed seals,guides but nothing happened.Compression test 225 all 4.It burns 1.5 qt per 3k miles with normal driving.I'm ordering penzoil platinum 10w30 to see if something is going to change(tryed the amsoil sgt 5w50 but didn't notice any dramatic change).The mechanic diagnosed "oval" cylinder walls when we took off the head for changing the valve guides.But my question is,why it isn't smoking if i drive it hard,or driving on the highway?Only at traffic situations and when i take off a traffic light or when decelarating for some time and then hitting the gas
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I have no cat(test pipe).But i don't think it's fuel what i see and what i smell.It's oil for sure.Also it consumes enough oil for normal driving.I'd expect to see smoke all the time and especially in vtec with broken rings but it doesn't happen.Only after idling for a while at the traffic and then hit the gas or after braking the motor by gear(downhill with gear braking-no gas) and then hitting it again.It's strange but there is nothing left for me,the head is ok so it is the rings or cylinder walls.All others checked.Pcv,egr e.t.c.Hope the oil will help a little.Any ideas about penzoil platinum 10w30?I've read somewhere it helps with f20c's that consume a lot of oil.Any other suggestion?
Thank all the guys for the answers. |
Originally Posted by nipponS2000
(Post 24458224)
Only after idling for a while at the traffic and then hit the gas or after braking the motor by gear(downhill with gear braking-no gas) and then hitting it again.It's strange but there is nothing left for me,the head is ok so it is the rings or cylinder walls.
I see you changed the valve guide seals, but did you check the valve guides for wear? With my previous car, seals alone didn't solve it - eventually I had the head rebuilt with new valve guides and the smoke ceased. |
I've also changed the valve guides.Nothing changed:(
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Originally Posted by nipponS2000
(Post 24458248)
I've also changed the valve guides.Nothing changed:(
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