Re: 402 stocker engine
 

Again, if it isn't smoking out the headers, oil isn't getting past the oil ring, or second ring. If it is smoking and "huffing" out the valve covers/breathers, that's cylinder pressure in the pan, and it may not show up on a compression test or a leak down. But it WILL show up on the dyno, or in the car, with a Dwyer gauge on the breather. If you don't have access to a dyno (an 8 hour drive to get on a dyno is a "no brainer", these days there is no substitute for a dyno for a race engine) you can test it in an automatic car, with two people.


If you have any sort of gapless ring, a leak down test can lie to you.



https://youtu.be/pzluLjqGe3U?si=zDn36xKZJblG9Nrg

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

Re: 402 stocker engine
 

The shop doing the hone have they checked the cylinder roughness with a profilometer? The intake gasket not soaked at bottom near intake runner?

Re: 402 stocker engine
 

I have a Fisher Porter blow by meter it is the same model Chrysler used that is where I learned how to use mine from Don McElory Ted Flack and John Worley! The company that bought Fisher Porter still has them available. They are more accurate than the Dewyer Plastic meter that Speed is pushing I tested them back to back when Hamburger was selling the Dewyer!

Re: 402 stocker engine
 

Did someone put the ring spacer on the bottom people seem to struggle with that.

Re: 402 stocker engine
 

Jeff it’s about 14 lbs

Re: 402 stocker engine
 

I did that years ago, but these piston have none, simple 5/64 5/64 3/16. ?

Re: 402 stocker engine
 

They have never been cut factory shock. To Hacksaw it acts like the cam is going flat,thats what it looks like but the cams fine?

Re: 402 stocker engine
 

Melling cast. Have done about 10 of them over the years,this is the only one to do this.

Re: 402 stocker engine
 

Not sure why you are doing this on your own. The first time you had this problem you should have brought your entire engine to the shop and let them figure out what the problem is. We all could guess at 20 different things it could be but until you bring it somewhere good you could hone this block right into new sleeves. I'd call the guy 5 post up and ask him if he has time to look at it. It's great to say you did it yourself or you don't have the money but at some point you need to stop the bleeding. BP