pressurizing coolant system

[estrada5.9]

Ok so when i get on it hard pulling a decent load uphill with boost at 35-40 and pyro at 1000-1100 i am puking coolant due to blown head gasket. I was towing with 18 degrees of timing and I thats just to much i figure. So its set at 15 now.

Now for the question:

My o-rings are ten thousands I have heard that this is great for contact pressure but it is in such a small area that it can be bad.

Should in get shorter rings and if so what size.

I had 40,000 on the last head gasket so I figure the higher timing and the towing must have done it. anything would be helpful right now I don't wanna do the head gasket with those rings if they are not optimal for my application and I really am over the beating the tar out of my pickup just goin for reliable

Hows it go again FAST CHEAP RELIABLE pick any two right

 

[Bjans]

A stock gasket should be holding with the conditions you described. Was everything flat when you put it back together? fire rings are the way to go in my opinion.

 

[estrada5.9]

Yes head was flat brand new from pure diesel power o-rings at ten thousands. I torqued it to 125

question is are 10 thousandths o-rings puttin to much pressure in one spot so it is not holding like it should.

 

[Bjans]

Not sure on the specs of the o rings, but kind of an interesting coincidence is that i got a brand new flat head from pure diesel power also, but mine with with fire rings cut and put it on and torqued it a few times, and it too was leaking coolant under boost. Took it to a local machine shop, and the head wasnt flat, and the rings were cut wrong acording to haisleys specs. had 2 shops verify before i sent it back to them just to make sure......Not sayin the same thing happened with yours, but i would make sure if i were you.

 

[estrada5.9]

Yea ill do that better to be safe for sure thanks

 

[wdimig]

A stock gasket should be holding with the conditions you described. Was everything flat when you put it back together? fire rings are the way to go in my opinion.

i wouldnt do fire rings in a street truck, i had 2 fire ring setups fail within 20k miles total, orings done right will hold for a long time, and be alot more reliable. i switched to a oring setup with i think 7-8thsnds. protrusion. 10thsnds. sounds a little to high.

wes