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Old 04-18-2001, 02:58 AM   #1
MichiganRS
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Member#: 3069
Join Date: Nov 2000
Location: Harrison TWP Michigan USA
Question Headgaskets/Turbos and DOHCs'

Ok on my hunt to blow my 98 RS I have found that the headgaskets suck the block sucks a bit more and a few other things suck. So first I was like oh hell I will just go buy some other car to make into a tarmac terror. Than I said no I am giving up to easy. So out doing the reasearch it is suggested to get a phase II block and keep the DOHC heads. Next was the headgasket issue I have seen to many past posts with this problem so to avoid the problem I have seen people using the new gasket that is made from a different matterial?

Now a few questions...

Does the headgasket replacment consist of loosing the 98 gasket which is a cheaper material and using a 99up gasket that is stronger to pressure?

Has anyone ran copper gaskets and isn't there a negitive on using this for a street car?

Anyone know how to identify if a DOHC has a phase II block? I recently read some 98/99s came with this combo.

Thanks for your time,
John
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Old 04-18-2001, 04:33 AM   #2
SteveS
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Join Date: Jun 1999
Location: South Jersey
Vehicle:
2007 BMW Z4 M Coupe
Interlagos Blue

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I don't have a straight answer for you since my MY98 is a "hybrid", using the Phase 2 block with the DOHC heads. The stock head gasket went on my car at less than 30K miles, 24K of them being boosted. The stock head gasket seemed to be pretty beefy and well made. When I had the work done, I decided to o-ring the heads and used stock head gaskets again. Hopefully this will put some extra pressure on the gaskets where needed and I won't have a problem again.

I don't know what the gaskets look like on the Phase 1 blocks.

Trey Cobb posted a thread a while back about how to identify the block type. If you look at the top of the block to the left of the oil pressure switch (located to left of the alternator), you'll see either 1 or 2 ridges extending from left to right. One ridge is a Phase 2 block, two ridges is a Phase 1 block.

Steve
http://www.forcefed4.com/
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Old 04-18-2001, 06:30 AM   #3
ColinL
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Member#: 114
Join Date: Jul 1999
Chapter/Region: MWSOC
Location: Wichita, KS and Whoring, OT
Vehicle:
'03 Evo, Rice White
'01 Erion CBR 929

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Trey can get copper head gaskets for you. He has a particular strategy for DOHC EJ25s depending on how much power they're making-- email them.
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