402 stocker engine

MAURICE BLENDHEIM · 04-19-2024, 11:31 PM

Toy... Something I continue to do is when the block comes back from the Machine Shop, I still wash the engine and most importantly the bores with a bucket full of hot water and Tide Laundry Detergent. It is amazing how black a rag will get scrubbing the walls. I finish up with a scrub brush. I believe the bore finish can't be clean enough, I normally wipe ATF on the bores, when dry to keep from rusting. We have never had any ring seal issues, causing high crankcase pressure. On the Dyno 5 pulls is what it takes, to have stable results.
One thing I have had happen is the valve seals have come off the intake guides. They then run with the valve and the seal actually acts as a pump, pumping up against the top of the guide, allowing oil the enter the valve pocket. This results in the backside of the Intake Valve being oil soaked and allowing oil to enter the Combustion Chamber causing embarrassing smoke clouds. MB

04-19-2024, 11:31 PM	#17
MAURICE BLENDHEIM Senior Member Join Date: Jun 2011 Location: Langley (no igloos), British Columbia, Canada Posts: 569 Likes: 311 Liked 284 Times in 87 Posts	Re: 402 stocker engine Toy... Something I continue to do is when the block comes back from the Machine Shop, I still wash the engine and most importantly the bores with a bucket full of hot water and Tide Laundry Detergent. It is amazing how black a rag will get scrubbing the walls. I finish up with a scrub brush. I believe the bore finish can't be clean enough, I normally wipe ATF on the bores, when dry to keep from rusting. We have never had any ring seal issues, causing high crankcase pressure. On the Dyno 5 pulls is what it takes, to have stable results. One thing I have had happen is the valve seals have come off the intake guides. They then run with the valve and the seal actually acts as a pump, pumping up against the top of the guide, allowing oil the enter the valve pocket. This results in the backside of the Intake Valve being oil soaked and allowing oil to enter the Combustion Chamber causing embarrassing smoke clouds. MB Last edited by MAURICE BLENDHEIM; 04-20-2024 at 10:30 AM.