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valve stems

Tech Talk for Nissan owners.

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valve stems

Post by dwaynes »

Hi guys My 4x4 is burnign a bit of oil and from some reseach i have done it looks like valve stem seals.


By this i mean it doesnt leak oil anywhere, also when reving there is no smoke but on deceleration i get a small puff.

is there any other options to determine whats causing the burning oil?

Also if its just valve stems whats it worth form them to be replaced?

Thanks
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Post by coxy321 »

I could be wrong, and i'm sure someone will correct me, but from what you're saying i'd have a guess and say its your piston rings.

You didn't say what car/motor it was in either, that'll probly help someone else answer the question a bit better.

Coxy
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Post by dwaynes »

Yeah sorry forgot all about that.

patrol with a TB42
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Post by PGS 4WD »

I'm generalizing but rings usually smoke under load and guides (stem seals) under or just after high vacuum situations like decelleration or long idle periods.

Joel
-Pre trip inspections/ servicing
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Post by dwaynes »

PGS 4WD wrote:I'm generalizing but rings usually smoke under load and guides (stem seals) under or just after high vacuum situations like decelleration or long idle periods.

Joel
Thanks Joel that was what my understanding was aswell. Is there anyway to determine if its one or the other or do i do the vavles and hope?
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Post by mikmav »

leave it idling for a while, a minute or 2, then give it a boot.. if you get a big puff of smoke, its valve stems..
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Post by Fozdick »

ive just ordered some genuine seals for my tb42 they were $4 each, so thats $48

ive made up the tools to do job, a valve compressor and an adapter to put air into spark plug hole.

let us know if yo need help and i will post up some pics

Shaun.
TB SLUG. Dints, Cracks, Scratches, Rust, Mud, Broken Bits and Rattles.
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Post by dwaynes »

Fozdick wrote:ive just ordered some genuine seals for my tb42 they were $4 each, so thats $48

ive made up the tools to do job, a valve compressor and an adapter to put air into spark plug hole.

let us know if yo need help and i will post up some pics

Shaun.
Let me know how you go but i dont have the expewrince to do my self ( wish i did ) So it will be goign to the Mechanic.
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