smoke after rebuild of top end

tsupranami · 02-12-2009, 08:20 AM

Does it puff a big cloud on startup? Trailing throttle? If so, old, hard valve stem seals and worn rings are most likely culprits. Mine was mainly valve stem seals. I had over 200k miles, and cylinders looked like new, rings were worn but not past spec, still had over 160psi compression. But it would paint a nice film of oil on the rear bumper after a few hundred miles. Yuk. I had my head surfaced and new stem seals installed for $200, including reassembly. I didn't let them touch the valves or seats, as they were sealing just fine. They just removed them , then cleaned and replaced them. Then I installed a MHG w/ ARP studs and turned up the boost. Smoke has been gone ever since and no more oily bumper.

supraspaz · 02-14-2009, 08:31 PM

well after using mass amounts of solvent. in the intake too i might add. i drove the car for about 15 minutes n then wow all was gone except a light blue (probablly the valve stem seals) puff on hard excel. runs smooth n no other signs of other issues (yet). will probablly do a mhg after i save n have some other small projects tackled on her. hopefully i can get some advice on the rebuild with mhg from everyone if possible. also if still waiting on the photos ... just a little longer ... i can't find my memory card. lol thanks again!

oh any good places to get parts or web sites? just curious

02-14-2009, 08:31 PM	#2
supraspaz Stock Join Date: Feb 2009 Location: Bethlehem PA Posts: 5	all is good well after using mass amounts of solvent. in the intake too i might add. i drove the car for about 15 minutes n then wow all was gone except a light blue (probablly the valve stem seals) puff on hard excel. runs smooth n no other signs of other issues (yet). will probablly do a mhg after i save n have some other small projects tackled on her. hopefully i can get some advice on the rebuild with mhg from everyone if possible. also if still waiting on the photos ... just a little longer ... i can't find my memory card. lol thanks again! oh any good places to get parts or web sites? just curious

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02-12-2009, 08:20 AM	#1
tsupranami Intake Join Date: Jun 2008 Location: Washington Posts: 32	Does it puff a big cloud on startup? Trailing throttle? If so, old, hard valve stem seals and worn rings are most likely culprits. Mine was mainly valve stem seals. I had over 200k miles, and cylinders looked like new, rings were worn but not past spec, still had over 160psi compression. But it would paint a nice film of oil on the rear bumper after a few hundred miles. Yuk. I had my head surfaced and new stem seals installed for $200, including reassembly. I didn't let them touch the valves or seats, as they were sealing just fine. They just removed them , then cleaned and replaced them. Then I installed a MHG w/ ARP studs and turned up the boost. Smoke has been gone ever since and no more oily bumper.