Head gasket options for high boost OM603
Head gasket options for high boost OM603
This time it was the actual fire ring material on the gasket itself; it cracked/fractured in several places. While it didn't entirely blow out and the whole gasket more or less stayed in place, once the fire ring is cracked, all the gasses are trying to sneak in between the soft fiber/composite layers of the gasket which is quite weak. All that's left behind was the perforated metal core part of the gasket where the blow-out was.
Also interesting to note... while the gasket itself didn't blow out between 5 and 6 like last time, it did allow pressure into that coolant expansion slot from the cracked fire ring; this is obvious as the gasket is blow open in the slit between 5 and 6. I'll post pictures once I get everything all cleaned up.
Anyone have a good link to which holes need to be cut out of the OM606 gasket if at all?
TwoMuchBoost
02-29-2020, 05:35 PM #9Got the head taken off today... very interesting failure this time. Fire rings on the gasket stayed in place, not a total failure like last time. The ARP head studs and O-ringed block definitely helped (I can see the imprints of the stainless o-rings in the gasket) which was clear as the car took another 10lbs of boost this time around. 40 psi is just too much for composite gasket and the heat of the higher EGT's combined with crappy gasket fire rings.... #14 head looks fine though! It's almost hilarious at this point.
This time it was the actual fire ring material on the gasket itself; it cracked/fractured in several places. While it didn't entirely blow out and the whole gasket more or less stayed in place, once the fire ring is cracked, all the gasses are trying to sneak in between the soft fiber/composite layers of the gasket which is quite weak. All that's left behind was the perforated metal core part of the gasket where the blow-out was.
Also interesting to note... while the gasket itself didn't blow out between 5 and 6 like last time, it did allow pressure into that coolant expansion slot from the cracked fire ring; this is obvious as the gasket is blow open in the slit between 5 and 6. I'll post pictures once I get everything all cleaned up.
Anyone have a good link to which holes need to be cut out of the OM606 gasket if at all?
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