rollincoal23

well i got a problem. any time i am running 10psi boost or more the rediator starts pushing coolant out the over flow. and if i start it in the morning to let it warm up for about five minutes the RAD hoses are rock hard. iv changed the thermostat,radiator cap, now i was thinkin about replacing the head gasket again. anybody have any ideas wat could be causing this?

wannadiesel

Sounds like a blown head gasket to me. I see you have studs, but is the head o-ringed?

archer39

sounds like all the stories of blown head gaskets that i have ever read about

rollincoal23

no the head is not o-ringed but it will deffinately be gettin done this week for sure. so what head gasket should i get? i want one that i wont have to wory bout again

RollinCoalSmoke

rollincoal23 they don't make that gasket yet lol, they would never sell any. The big boost numbers you can put out probably blew your head gasket. Cummins gaskets is the choice, from what i've been told a .020 over thickness is what you want but check with the more knowledgeable guys on here. O-ring that bad boy and your supposed to be good to 65 70 psi boost I think. Good luck with it and another congrats.

Riflemanusmc

I see that there is a MLS HG for the 12 valve. The 3rd GEN owners have had
good luck running these with ringed heads. Wonder how it would do with a 12er....

rollincoal23

well i might just try that then

rollincoal23

anybody got any other suggestions on wich head gasket to get?

wannadiesel

Get the 0.020 over Cummins gasket. The 14mm studs and the o-rings will keep it together.

Benjamin b2

are the "O" rings stronger fire rings or where do they go and what do they do, i dont see where they would go, i just did a head gasket to a motor home last week, couldnt figure out where they go

BC847

Didn't they recall the 12v MLS gasket for more R&D? Or am I thinking of something else?

Riflemanusmc

Not that I know. Put one on today, bought straight from RMC. The one thing that will mess with one, is that if you blow it between the cylds it will "HEAL" itself so to speak. Carbon will pack into it. It will be fine untill you start running it hard and building tons of boost, then it will rear its head. And that is what happened to the one that I R&R today. Have two 12 valvers here that run the MLS with ringed heads. And a ton of boost. Zero problems.