Keep blowing head gasket need help
 

One of my rigs keeps blowing the head gasket right in front of the block right by the fan mount by the head. It blows out to be the oil valley? its just gussing oil right out of the head. The head was decked and oringed the last time it happened I put on about 2 hrs of time then layed into it and it blew out again oil everywhere same spot as last time and I put in arp studs to as well, im thinking its time for a new block? im gona rip it apart again and throw a straight edge on it. its a 98.5 24v

did you have the head checked to make sure it's not cracked and it's flat?

also a straight edge on the block is a good idea to make sure it is not warped.

What are you torquing your head studs to?

your super b is the single or the special? and what kind of boost are you pushing with it?

Head was decked last time around this is a different truck than my sig one. It's a 98.5 ppump 24v. Oringed head decked bla bla. I torqued it down to 125 last time with arp studs. This time I went to 145 after doing some research so il have to see this time wat happens. And I never did the hot retorques i only torqued the head down once and drove it

If you don't retorque it, it will blow it when using rings. We let them come up to operating temps then shut them down and retorque. After 3,000 miles we retorque again. Sooner if the owner is beating on it harder than daily driving.

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^^this...if the gasket is new and just breaking in, and you have new rings in there...you really need to retorque them.

I run just a stock head gasket, and cheated with mine and only torqued once because when they did my head gasket I had them torque the head bolts to 135#.

I later replaced the bolts with studs at 135# one at a time.

2.5 years later I finally retorqued them again when I did my spring and push rod install. about 1/2 dozen turned a tiny bit during the retorque..

I just blew the head gasket again last night now this time it is oil in the coolant, truck runs fine, I did 3 hot retorques this time as well and had about 600 miles on the truck until I layed into it

what kind of gasket are you using.:hellox:

Ring protrusion is wrong or an issue with the wire a possibility I guess.

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or hes just running too much timing and boost...

:pca1:

makes me wonder how high your drive pressures are on your turbo...

Drive ratios maybe but I've seen ringed trucks run with off the chart timing 25°+ without issue.

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Im using a felpro stock gasket non oversized, im running 28 degrees of timing and im turning it down this time. and im fire ringing the head this time. this is the third time coming off now!!!

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Im also running a 66mm turbo non waste gated, the first time it blew up it only had a stock hx35 gated turbo

I see all the answers... thats doh! timing that's really only useful for all out competition, common sense says "why?" For a street truck that's just stupid. Felpro? Really, you came on here to whine about a felpro gasket blowing over and over again? Try a cummins gasket. Doh! And a few post back you said the head was surfaced but you're using a standard gasket thickness? Really? This is why we got out of performance. All the DIY screw ups and messes. How bout you take your truck somewhere that knows what their doin?
Fire ring it.... I'll lmao. You pissed about blowing gaskets now, you'll have the head off of it more than you'll have it on it with fire rings. Quit reading forums and thinking youve got the required knowledge to wrench!
Wait.... this is in the vp forum. Is it a p pump truck or are you just trolling lol
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I suggest trying a Cummins gasket as well. Every situation is different, but here is what I have been running;

Did a Cam, Valve Springs, and pulled the head to do it so I could change the gasket. Didn't measure the block, didn't get the head surfaced, just cleaned it really well. *I know some may think "are you retarded??" Well guys, been a HD diesel tech for 14 years, and there are A LOT of machines out there that have got this treatment, and have NOT had issues* I used a Cummins head gasket, ARP head studs, retorqued, I push 55 psi boost with my compounds, and there is about 20,000miles on that head gasket with no problems. Daily driver, weekend warrior with my holiday trailer and quad in tow.

Right but there is a big difference between a tech and diyer. Lol I always have em surfaced for liability reasons as far as customers go but I've got a couple of our own vehicles running heads that were not surfaced and haven't had a issue. We also know what to look at in regards to finish on the head and and warping or twisting that most diy guys miss. most diy guys wouldn't spend 200 on a straight edge either.

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+2 on cummins gasket...might even want an extra thick one to reduce your compression slightly...

and fire rings?! really.... fire rings are not street friendly and tend to come apart after too many heat cycles. get a better quality gasket and back that timing off.

might also want to put a gate on that turbo depending on how much fuel you are running to it...

drive pressures will kill a head gasket just as fast as timing will.


btw: I'm running 10* over stock and backing it down in increments to stock as rpm's go up (gotta love vp44 dynamic timing) as well as 68-75psi of boost. no o-rings or fire rings...stock cummins head gasket with the cheaper ARP studs. no issues in the 3+ years the twins have been in there with the head gasket...:c:

OK sorry i didnt know much about the fire rings, the guy who owns a performance diesel shop told me to get rid of the orings and go for fire rings. I pulled the head off it tonight and head gasket was fine, so it leads me to the oil cooler which is going to come off tomorrow so I can test it. Im going to bump the timing down once I get the head back on from getting magnifluxed and pressure checked.

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The truck that im talking about is my 98.5 ppumped

I feel like I read something in regards to injector pop pressure on p-pump 2nd gens effecting final timing if utilizing the factory vp injectors but im not sure which way. Dont have much experience there so couldnt tell you timing wise.

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injectors were pop tested for ppump presures