The head gasket slayer!
In case anyone is interested, I made another gasket leak coolant into my engine.
First build on the engine when everything was revamped (forged, all new gaskets etc.) was with a Fel-Pro gasket and Fel-Pro bolts torqued to stock spec (something like 40 lb-ft). After 5,000 miles of moderate boost (10 psi), the gasket leaked coolant into cylinder one severely after some tuning runs @ 14 psi from the Garrett T3 50 trim .48/.42 turbocharger (baby). Replaced that head gasket with a factory GM gasket along with ARP head studs torqued to 75 lb-ft (but left the 2 small studs near cylinder 1 @ 40 lb-ft, my mistake). After 10,000 miles of moderate boost from the same turbo and then 18 psi from the GT3076R, it finally became significantly noticeable over the course of the past 6 months that the head gasket was leaking into cylinder 1. The car has been having odd vibration/stumbling upon startup, and definite cooling system oddities and slight overheating even before ASS. Even quite a bit before ASS. I remember me leaking coolant from hose connections significantly more when I went under high throttle since the compression in cylinder 1 was leaking into the cooling system. So this has been going on for a while, slowly getting worse and worse. What's funny is I beat a Corvette last week, on a leaking head gasket. This time I ordered a Cometic. I'm going to drop off the head to D&S Engine Specialists to ensure the head is perfectly flat and the roughness specification is satisfactory for the new head gasket. I will also torque every nut/stud to 85 or 90 lb-ft. From j-body.org, replies to a similar post I made: Quote:
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The beginning. Yummy stuff on the timing chain cover. Always seems to collect there when a head gasket goes. The camshaft sprockets and chain still had the markings I put on it last time the gasket blew, ha. Time to take off the turbo then head. Similar damage as the Fel-Pro before. |
and THIS is the primary reason I won't touch engine mods. the car spends as much time, down, as it does up.
:glare: not worth the money/effort, if its not reliable. |
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Very good info and documentation, I'm sure it will get stonger every time out, and you will take it to another level. Quote:
It's called research and development, and he's pushing the build to the limit so it can be improved upon. In case you didn't notice, he's taking steps to make it reliable. |
Be careful with the Cometic gaskets. Not only must the head be flat, but the head surface and also the block surface needs to be prepped properly; 50RA or better on the surfaces.
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i'd rather spend my time boosting than wiring up all those led's. :p |
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Edit: Cometic states right on their website a maximum of 50RA is recommended for proper sealing, and I found references to that number on j-body.org. Cool. Quote:
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try to get the most top rated and highest pressure rated gasket you can find.
there a little thicker but it's the only way you can handle boost without have to change it all the time. the thin ass forged ones get alot more horspower cause theres less room from the head to the block but that's mainly for strictly racing |
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haven't done any led work in quite some time.... :glare: i barely do maintenance now. |
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Damn I thought u had a cometic when the engine was built. How much boost are u shhotin for?
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Same as before.. 18-20... HPTuners and my 2 bar MAP sensor can only utilize up to 210 kPa before it just copies the last cell of the table and uses the same values for fueling etc. beyond that. So up to 20 is still safe enough. Should be fine for low 12s/high 11s.
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yeah me too I tought that.... what did you do with the cometic that I sent to you ???
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Hmm I think I sold it a long time ago. Wish I'd've kept it. Stupid gaskets are made to order and Jeg's said it was supposed to ship out on the 6th.. still hasn't shipped.
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well that's what i meant. using the multilayer ones are thicker for giving up a little less horsepower but can handle more boost pressures.
forged is another word aluminum. hence forged pistons some racing style spoon engines used forged pistons for more power and those engines always have to be gone through |
Do you think before you type?
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Screw it Chris.....just O-ring the block.;)
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You have just proved you are a moron. Go do some research and then come back to this thread. Until then GTFO. I wish I had your patience Chris, I am nearing the stopping point with mine. Want a carbon fiber hood for cheap? |
WTF ?? how can be FORGED mean the same of ALUMINIUM.... '' I dont use FORGED foil to cook potatoes on the BBQ ???
And a thicker gasket gives a little less "compression"... not horsepower... and you can even have the Cometic MLS gasket in stock thickness !! he's already got low compression forged aluminium pistons Quote:
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what do u expect the kid has been posting shit all over threads he is a moron i would go with the MLS headgaskets.
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Sorry to threadjack... but I do want a cf hood
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