Generation III Internal Engine - EITHER Bad Rings or bad valve seals right???????????

hey guys ive been trying to figure out my cars smoking problem lately so i took off the intake manifold and found a lil puddle of oil behind all the valves that where closed..now this motor has only 30,000 miles on it. so i wonder if the shop that did the work either messed up on the bore for the piston/rings or valve seals took a shit already please any help would be great becaus i want to take the motor apart asap sadly.... thanks for your help!

http://i21.photobucket.com/albums/b275/Velocityman/IMAG0103.jpg

Are you running the pcv system correctly with a catch can ?
If not, that's probably where the oil is coming from.

To verify, disconnect and plug the pcv inlet to the intake and vent the crankcase. Drive it and see if it smokes.

Are you running the pcv system correctly with a catch can ?
If not, that's probably where the oil is coming from.

To verify, disconnect and plug the pcv inlet to the intake and vent the crankcase. Drive it and see if it smokes.

Yes ive tried everything only thing left is a ls6 valley cover

Bump, please any help or opinions will helpi

I'm not an expert by any means, so take what I have to say with that in mind. I just don't see how bad rings could cause that. I would lean more towards valve guides and seals. IMHO.

Thats alot of oil. The only way I would consider the rings being bad is if they had so much blowby that it was overwhelming the PCV system. Valve seals could explain the puddling of oil after shutdown. Then again if you had massive blowby the PCV could be coating the intake runners with oil and it puddling on the valves after shutdown too. Like others said disconnect the PCV and put a breather on. Then drive the car awhile and recheck if you still have this issue.

valve seals

I'm not an expert by any means, so take what I have to say with that in mind. I just don't see how bad rings could cause that. I would lean more towards valve guides and seals. IMHO.

Right on man thanks

Thats alot of oil. The only way I would consider the rings being bad is if they had so much blowby that it was overwhelming the PCV system. Valve seals could explain the puddling of oil after shutdown. Then again if you had massive blowby the PCV could be coating the intake runners with oil and it puddling on the valves after shutdown too. Like others said disconnect the PCV and put a breather on. Then drive the car awhile and recheck if you still have this issue.

Yes i tried that and it would still burn, thanks for the opinion.

valve seals

Agreed thanks im going to remove the heads right now as for buying head gaskets thats going to be tough finding 383 ci gaskets any ideas?

Make sure when you have the heads off to measure your valve stems, and the valve guides. You may need to have the guides replaced or knurled.

Agreed thanks im going to remove the heads right now as for buying head gaskets thats going to be tough finding 383 ci gaskets any ideas?

Is this a ls1 block with a 4" stroke crank to make the 383ci ? What heads do you have on this motor ? Head gaskets are determinded by the cc size of your heads.

Make sure when you have the heads off to measure your valve stems, and the valve guides. You may need to have the guides replaced or knurled.

right on thanks

Is this a ls1 block with a 4" stroke crank to make the 383ci ? What heads do you have on this motor ? Head gaskets are determinded by the cc size of your heads.

yes i believe it is conan and the heads are stock ported

Whats the casting # on the heads ?

http://i21.photobucket.com/albums/b275/Velocityman/IMAG0109.jpg http://i21.photobucket.com/albums/b275/Velocityman/IMAG0108.jpghttp://i21.photobucket.com/albums/b275/Velocityman/IMAG0110.jpghttp://i21.photobucket.com/albums/b275/Velocityman/IMAG0111.jpg

Mine did that in January, and new valve seals fixed it. Same oil on top of the closed valves....valve seals need to be replaced. I even r&r'd them once, but apparently I installed them wrong and the machine shop had to install them again.

Mine did that in January, and new valve seals fixed it. Same oil on top of the closed valves....valve seals need to be replaced. I even r&r'd them once, but apparently I installed them wrong and the machine shop had to install them again.

Wow sounds exactly like what happened to me!

Your pistons look cleaner than i would have expected to see. It looks like you have GMs MLS head gaskets. Can you find a casting # on the heads ? I would take your heads to a machine shop and let them clean and inspect the heads. Replace the valves seals, check the guides, and let them vacuum test the heads..

Your pistons look cleaner than i would have expected to see. It looks like you have GMs MLS head gaskets. Can you find a casting # on the heads ? I would take your heads to a machine shop and let them clean and inspect the heads. Replace the valves seals, check the guides, and let them vacuum test the heads..

yessir at the shop already going to replace all guides and seals. yes the head had a badge stamp (806) im going to post the pics.

[IMG]http://i21.photobucket.com/albums/b275/Velocityman/IMAG0117.jpg[/IMG

http://i21.photobucket.com/albums/b275/Velocityman/IMAG0117.jpg

yessir at the shop already going to replace all guides and seals. yes the head had a badge stamp (806) im going to post the pics.

:cool: Hope this takes care of the problem.

What size was the block honed to ? 3.903 3.905 ?

http://www.texas-speed.com/p-2274-gm-57l53l-multi-layer-steel-ls1ls6-cylinder-head-gasket.aspx

http://www.texas-speed.com/p-205-gm-60l-ls2-head-gasket-multi-layer-steel-per-gasket.aspx
Talk to them about thickness between the 2 gaskets to get the best for your setup.