Valve Adjustments forthe Poly engines (318) Specifically

[mr. fix it]

Ok so I'm smoothing out things here and see that the FSM states I should adjust the Rockers once the engine is up to operating temps.

I wanted to know if anyone has adjusted the tappetts doing this then after a good cool down checked the valve clearances...

If yes then,

1) What was you measurements taken?
2) were they varying greating from the hot adjustment?
3) Were they varying cylinder to cylinder greatly?
4) Or were they stable across all cylinders?

Let me know what you know!

Thanks!!

 

[mr. fix it]

Ok, so it looks like I have found my own answer this time!

I guess I should have shaken that Google Tree a bit more before posting here..

I have to add .002" for each intake & exhaust to make up the difference from hot to cold.

Setting to

.0015" for intake
.0023" for exhaust

 

[BJS racing]

On my old one that the jamb nuts were worn out I ran both at .0020 and the intake would not gain as much as the exhaust when closing up after running and I never had an issue with mine. But some will probably scold for that method. Ran that way for about 4 years before I pulled the motor.

 

[mr. fix it]

I understand that these Polys are a tough engine and will take a lot of abuse..

 

[BJS racing]

They were and still are used in Crane's for industrial use so yes they are very tough engines. Steel crank engines. I beat mine to death and it wouldn't die!