Quote:
Originally Posted by bigpanda16
I’d bet an elring klinger om603 gasket would hold up better than vr.
MLS are even better, but much less forgiving of any surface imperfections in block/head.
If properly maintained: 380kmiles may last quite a bit longer
Good luck with the build either way
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After a whole night of researching the topic, I came to the following conclusion about OM606 MLS gasket on a 603; will it work? Maybe... and for how long. It seems the surface finish of the head casting is fantastic but the block is a very high RA better suited for composite or copper gasket. The water jackets inbetween the cylinder bores seem to be problematic for the 603 using a 606 gasket. For me and my current situation not wanting to dump money into the 603, the prep work required to make the MLS gasket makes it not an option.
Furthermore, I don't think gasket quality caused the failure in this instance; it's pretty clear the head was lifting from cylinder pressure and moving around. The block side of the gasket looked like it stayed put and the head side had some light abrasions around the fire rings even on the cylinders that didn't let go. All the *uprated/new* headbolts I bought before the last head gasket install all measured out to spec; no stretch. It's clear they can't hang though...
Quote:
Originally Posted by vstech
Does anybody install ss o-rings in these? All the race motors I built, we cut in grooves in the block and set stainless o-rings on copper gaskets. Just a thought.
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Quote:
Originally Posted by wschotty
That is awesome. I like vstech's idea for fire rings, lot of the high HP cummins are running those if you can find somebody who can machine in the groves.
Hope this round lasts a bit longer!  |
I've been busy planning and missed these last few posts but it's funny you mention that because...
STATUS UPDATE! bought that OM606 turbo with crazy high mileage after they sent a video of it running in the car still. The game plan is go through the 606 slowly and clean, re-seal, and fortify it for BIG power while I rock the OM603 once it's all back together.
Speaking of putting it back together, just purchased a block o-ringing tool from Isky Cams, some 0.041 stainless steel wire, and a custom set of studs from ARP (don't ask on price... I'm still spinning and need to take a seat).
Looks like we're going on a journey folks; follow me to see the farthest a #14 head casting has ever been pushed. Some real clamp loads and fire-rings ought to show what a 603 is really made of. Here we go!