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Old 04-16-2024, 08:45 PM   #1
Jrh5220
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Question Re: 402 stocker engine

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Originally Posted by mtkawboy View Post
Ive seen small casting flaw holes in cylinder heads or intakes suck in oil when I was a dealership mechanic. Its rare but it happens
It has not smoked out of the exhaust, it actually leaks fairly well,
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Old 04-16-2024, 10:53 PM   #2
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Default Re: 402 stocker engine

Do you know what brand and material the sleeves are ?? curious -- thanks
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Old 04-18-2024, 11:34 AM   #3
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Default Re: 402 stocker engine

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Originally Posted by Henrys Toy View Post
Good morning to all,
Since you recently had this engine honed and re- ringed it, have you made any full power pulls on a dyno ?
It'll take a couple of pulls to get the rings to seat. Running at Idle or above Idle won't seat the rings.
Also what shape were the ring lands in ? If they have a excessive amount of play ( up & down) they won't seal either.
If you haven't run this engine on the dyno, I would, then make at least 4 or 5 full power pulls and that should get things in order.
Good luck with your adventure and keep us posted with your results.

Respectfully,
Henry Kunz 1534 H/SA
Henry the pistons are new lands are good,this is the second set of pistons had the same results. Here in South Dakota the dynos are few and far.
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Old 04-18-2024, 07:23 PM   #4
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Default Re: 402 stocker engine

Not having smoke from the headers simply means there's not a lot of oil getting into the combustion chamber, by the oil rings or the valve stem seals.


Smoke from the valve covers is a sign of blow by, or oil temperature problems. Blow by will actually blow the oil ring out against the cylinder walls, and stop oil from getting by. With good quality modern rings, odds are your problem is the hone, or what you're doing to assemble the engine.


Call Keith or Kevin at Total Seal.


The proper way to test cylinder seal is with a blow by meter on the dyno, with a Dwyer guage, there's no real substitute There's a video on youtube, by Lake Speed Jr.
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Old 04-18-2024, 10:27 PM   #5
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Default Re: 402 stocker engine

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Originally Posted by Alan Roehrich View Post
Not having smoke from the headers simply means there's not a lot of oil getting into the combustion chamber, by the oil rings or the valve stem seals.


Smoke from the valve covers is a sign of blow by, or oil temperature problems. Blow by will actually blow the oil ring out against the cylinder walls, and stop oil from getting by. With good quality modern rings, odds are your problem is the hone, or what you're doing to assemble the engine.


Call Keith or Kevin at Total Seal.


The proper way to test cylinder seal is with a blow by meter on the dyno, with a Dwyer guage, there's no real substitute There's a video on youtube, by Lake Speed Jr.
Alan -- what are you thoughts or results on using sleeves in BB blocks ??
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Old 04-18-2024, 11:19 PM   #6
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Default Re: 402 stocker engine

Not sure if anyone else ask this. Do you know the tension on oil ring?
The other would be seating the rings. Either on a dyno if in car then maybe get brake pressure as high as you can and run motor in gear as high as you can. If unable to hold in 1st gear try second gear. I had trans brake on my super stocker and it worked well on rebuild. Don't forget to remove rpm chip. Hopefully carb is not leaking when sitting and washing out cylinders.

Last edited by Jeff Stout; 04-18-2024 at 11:24 PM. Reason: More
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Old 04-19-2024, 09:30 PM   #7
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Default Re: 402 stocker engine

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Originally Posted by Bob Sherwood View Post
Alan -- what are you thoughts or results on using sleeves in BB blocks ??

We have had good luck. However, to be very clear, we use flanged diesel sleeves. I won't use a non flanged sleeve anymore, for anything. Flanged sleeves are a royal pain, especially if your block is already "finished", and you don't want to deck it much, if any. But properly installed flanged sleeves do not move, and do not distort. Also, a good quality sleeve is better material than a production block. Combine a quality sleeve with the modern diamond hone process as prescribed by guys like Keith Jones and Lake Speed Jr., at Total Seal, and you have the best possible cylinder.
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Old 04-24-2024, 03:54 AM   #8
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Default Re: 402 stocker engine

The part that doesn't sit right with me is that it sat for 3 years, and somehow became a smoker
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Old 04-25-2024, 09:00 PM   #9
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Default Re: 402 stocker engine

I would consider changing the Oil to Maxima break in Oil and then put a load on the motor in the car a couple of times, letting it cool down in-between and see if this changes the breather oil smoke condition.

Steve Teeter Stk/SS 620
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Old 04-26-2024, 06:48 PM   #10
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Cool Re: 402 stocker engine

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Originally Posted by SDT1DYI View Post
I would consider changing the Oil to Maxima break in Oil and then put a load on the motor in the car a couple of times, letting it cool down in-between and see if this changes the breather oil smoke condition.

Steve Teeter Stk/SS 620
How warm should the engine be? Before the shut down?
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