HP 525 SC blown head
 

All right, I need some input. While I'm not the smartest person here, I've seen the inside of a few differrent type motor's in my time. But this one stumps me, never seen a chevy head fail this bad.
Was runnin about approx. 4500, 66mph at a lake nearby and she just started barkin, pulled it back and she never ran worse!. :eek:
Did some trouble shooting and yanked the head tonight........which brings me to my second delemia, I need a head BAD, I have a vacation planned this weekend and am willing to pull a few all nighters :stupid: to make it happen...........made some calls today and not much luck yet. Any info woud be appreciated. 1996 336SR1 HP525SC motors Starboard s/n F615821.

Re: HP 525 SC blown head
 

Damm thats bad.You have bad happing that caused this :eek:

Can you get better picks??????

Re: HP 525 SC blown head
 

Intake valve looks sunk also

Re: HP 525 SC blown head
 

Whats the block look like?

Re: HP 525 SC blown head
 

Wow !!! Only seen that on engine's with too much nitrous or not enough fuel - whichever way you want to look at it. Okay, seen it on a few blower motors too. Doh.

That's too bad !!!!

You definately want to look for other damage, as Biggus suggested, as well as look for a root cause.

Re: HP 525 SC blown head
 

Believe it or not, block ,piston and bores are all fine, no damage what so ever. I seem to agree with SB, I'm thinkin she went lean and being blown motors, didn't take much to do some gas jet machining to the head :mad: Most residue went out the exhaust. I'm sure if left run longer there would certainly be some block damage, but the motor God's were looking over me :D
Since I've found out that Merc thinks their heads are worth their weight in gold doubloon's, and availability is an issue, (cancelled trip, gonna try for next week :evilb: ) I'm looking at aluminum aftermarkets, Any info would be appreciated.

What did you end up with for heads and did you figure out what caused your problem?