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- Nov 11, 2007
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- 8,199
^^^^^^^^This? Although I think that would just result in lose bolts, not broken ones.
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Not sure what you mean by "washed out". I checked it with a straight edge last night and it seemed ok in poor lighting. Going to check it today in better light to get a better look. I only drove it about 200 yards once the gasket blew completely out. It didn't show any signs of having a bad gasket/broken bolts until it completely let go.
Cool. Makes sense. I will be cleaning up the head and block hopefully tonight and should get an idea where I'm at then. I think I'll be ok there though as the engine only ran for 2 minutes max with the leak.
ARP is replacing the bolts - I am sending the broken bolts to them so they can analyze. I'm sure this will take some time though. I will post the results when I get them. I know there are some interested folks out there.
How could you know when the leak started??:?
I would take a look at the top bolts and see if they bottomed out when you were torquing them down. That would put all the stress during combustion on the bottom bolts, causing them the break.
Just an alternate thought...
Any chance you could upload a hi-res and up-close image of the fracture surface? It would be obvious if you over torqued it vs a brittle bolt vs fatigue.
Eric
not the greatest pics but here you go.........
I would tend to say those are overstress failures but hard to tell with photo. ie, over torqued. Were those new bolts, wondering why they are already pretty rusty.
I'd also be taking the torque wrench in to be checked out by a calibration lab.