so i recently changed the head on my gsr. started the car then oil was leaking INSIDE the exhaust manifold only in cylinder #4. no oil is dripping onto the manifold. also the brand new spark plug in #4 was burned and had a oil on the thread..anyone know whats wrong? valve guide seal? bad block??
check the rubber o ring for spark plug #4 under the v.c. Did you torque the head right and did you use arp head studs or did you reuse the oem head studs? the oem ones are pretty much no good once they come off once. they strech and you wont get the right torqe value using them.
It sounds like your vlaves are no good.
if you did a recent oil change there might be a slight chance that it has too much oil as well. I know it sounds dumb but it happens.
how can i tell if the valves are bad? i recently bought a new head from cl..bad idea? it was resurfaced at the machine shop and cleaned out and the valves looks brand new...and i only put 4 quartz of oil in ...maybe less
If this has happened before you installed the head, then bad piston rings could be a probable cause. However, this sounds like it could be a bad valve seal or a bad valve guide. But piston rings could still be a cause.
Check out Scott_Tucker's post on this thread, he explains how to diagnose it very well.
So this is your original block that never had an issue before? You just changed out the head for a new one? If thats the case then there is something wrong besides piston rings taking a dump when changing out the head. Only things that are reasonable are a warped head, bad head bolts/studs, backwards head-gasket bad valve stem seals or in properly torquing the studs down.
Sounds to me like it could be your valves or valve guide/seal. Especially if it started when you put the head on. If it were the rings it would probably be smoking pretty bad too. I'd put money it's the head.
I'm going to assume that you know how to properly torque a head. Even so, if it was not torqued well enough or it had a bad head gasket, i'm not sure oil would be leaking into the exhaust.
As for the head bolts, they are not torque to yield. They can be re-used.
To the OP:
Unless the problem has been like this for awhile I doubt it is the rings. Even if it were the rings, you would be better off installing rings then you would buying another Craigslist part that probably isn't in any better shape.
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