O-rings question

[Capinoy123]

Does anybody know any machine shop in minnesota that o-rings 4G63T blocks???

[Pushit2.0]

D and G motors in Hopkins can do the head or the block, I do not recall. What head gasket/head studs are you using right now? I assume you have blown a head gasket?

[Capinoy123]

I used the Mitsu metal head gasket, with ARP's, ran 30 psi at the track and pushed coolant all day long! Ended up warping the head and blowing out the head gasket around cylinder #1. So now i purchased ARP L-19s, and i want to get the block O-ringed and use a mitsu metal head gasket. So D&G Motors does one of them for sure?

[JET]

Why do you want to o-ring the block? Getting it right is extemely difficult. Run some A1 headstuds and a Felpro MLS gasket if you are worried about sealing.

I run 32 psi on a stock headgasket and regular ARPs. It sounds like you had tuning issues likely. The headgasket acts like a fuse and will blow while hopefully saving the internals. I used a cometic HP and it actually melted the head on the dyno before it let go.

[turbotalon1g]

^sick, i actually am a big supporter of stock HG and ARPs (reg.), seen over 35psi on mine.

[Capinoy123]

Well i plan on hitting somewhere in the 700hp range next year and i just want to do everything right the first time. I just herd good things about O-ringing the motor. So i thought i might try it out but who knows my plans are never final. My tune is great, i just overheated the motor a while back and the head has just never sealed right since! I'm putting compression in my cooling system, when i drive home from work i pop the hood and you can feel my upper radiator hose.. rock solid! Im just checking out my options..

[JET]

One of the problems with o-ringing a 4g is that there is not much room between the cylinders to o-ring. Research what some of the big dogs are doing. I am pretty positive Marco is not o-ringing any of his stuff, he is a proponent of the Felpro MLS gasket.

[Capinoy123]

JET you say ur running 32 psi on a stock headgasket and regular ARPs ??? An organic stock head gasket? what kind of power are you making?

[JET]

Yes, I am running a stock composite headgasket and regular old ARP's. I had it on the dyno several times and made between 450 and 460 awhp at DB.

[Kevin 1G Drummer]

Did you try geting the block and head decked after you overheated it?

[Halon]

Stock composite head gasket and ARP's here as well. The combo hasn't failed me yet , so I see no reason to change until it does.

[Capinoy123]

Yeah im doing some machine work during the off season. Gosh here i come!

[Pushit2.0]

If you have a turbo bigger then a 67mm something then start looking at L-19 studs and the Felpro MLS, but anything smaller then that a stock composit gasket (a little copper spray will help also) and ARP's torqued to 100lb/ft with moly lube on the threads, inside the nut and between the nut sholder and washer, none between the head and washer, it should hold just fine. Unless you are knocking, or have a warped block/head. Boost by it self does not equal cylinder pressure (OMG torques and with RPM comes OMG horsepowers). You need to have the right amount of ignition timing and boost at the same time. If you run 35psi and a few degrees of ignition timing you are not going to make a lot of cylinder pressure. But you look for MBT at 35psi then you will start to see a big change in power and stress on items, like head gaskets etc.

~John
In short do not spend the money on Orings, yet. Use the L-19 studs(do not over torque them they will break) and a Felpro MLS with a fresh deck on the head/block then re tune the car.

[Goat Blower]

I'm using plain old ARP's with a Cometic multilayer gasket running 30psi daily. I've gone higher than that on E98, no problems although it might have been pushing just a little bit on the dyno.

[TkrPerformance]

craig ran 33psi all the time with std arp's and mls mitsu head gasket on his gt3582

I run 28psi with std arp's and mls mitsu head gasket on the evo III 7bolt

[Capinoy123]

ok sweet! thanks for all the great input guys! Very helpful. Looks like I'll be running the L-19's with a felpro Mls gasket, and a FP88HTA turbo :-) all on a fresh built block and a fresh built head! See you guys next year!