ToplessZ Posted January 10, 2004 Share Posted January 10, 2004 Can someone explain this process to me and how much benefit can be gained. Thanks Quote Link to comment Share on other sites More sharing options...
Guest freakypainter Posted January 10, 2004 Share Posted January 10, 2004 small grooves are cut into the block around the cylinders. you install o-ring into the grooves, then a head gasket, then the head. It helps make a good seal for high compression, mostly used by guys who run ALOT of nitrous Quote Link to comment Share on other sites More sharing options...
preith Posted January 11, 2004 Share Posted January 11, 2004 There was a pretty good thread on zdriver on this: http://zdriver.com/forums/showthread.php?s=&threadid=5692&highlight=oring I want to stress that technically there are two different o-ring setups. The one that freakypainter mentioned, and the other which is commonly refered to as "fire-rings" These are the larger compresable stainless rings which are exposed to the cylinder, hence "fire-ring". I'll leave it at that, the thread tells the rest. Phil Quote Link to comment Share on other sites More sharing options...
TimZ Posted January 11, 2004 Share Posted January 11, 2004 I've been using the fire-ring gasket for several years now, and I have never had any need to drain my coolant when I'm not using the car - that's insane. I usually do have some slight water leakage when I first fill with water with a fresh gasket, but I've made it a practice to heat-cycle and then retorque the head at least three times after installing a new gasket. Then change the oil. This pretty much cures any water leakage problems for me. Quote Link to comment Share on other sites More sharing options...
preith Posted January 11, 2004 Share Posted January 11, 2004 I've been using the fire-ring gasket for several years now, and I have never had any need to drain my coolant when I'm not using the car - that's insane. I agree, it is insane, but that's what Steve at Nissan Motorsports told me. I beleive there is some truth to his statement. But since then I've talked to others who have run this setup, and have told me the contrary as well. I beleive the root of my problem was not enough torque on the head bolts. Do you use ARP studs, and what torque do you run them at? Phil Quote Link to comment Share on other sites More sharing options...
TimZ Posted January 11, 2004 Share Posted January 11, 2004 I beleive the root of my problem was not enough torque on the head bolts. Do you use ARP studs' date=' and what torque do you run them at? Phil[/quote'] Yes, I use the ARP head studs. I torque them to 60 lb-ft, and do not use the moly lube - just motor oil. IMHO, the moly lube sounds attractive at first, but it's not really very practical. For instance, once you have run the motor for a while, now what value do you retorque to? You now have a mix of Moly and motor oil, and possibly not the same mix at every nut. I think it's just safer to go with motor oil and use the higher torque values. BTW, I do generally use a spray-on gasket sealer on the gasket - I've used either copper or hylomar. Quote Link to comment Share on other sites More sharing options...
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