Two blown heads! Help!

[mopardudes]

I know I should read all 8000 threads on here for the answer but I'm too frustrated. I blew both heads on my 99 Launch today with the Indmar. Where can I find replacements. Thanks guys this is really putting a damper on my season and it just started :cry:

[jsandy]

should be any gm part number for vortec heads. but how on earth did you blow both head gasket?

[mopardudes]

I wish it was just the gaskets. Both heads are trashed. One has a hole the size of my fist and the other is cracked. The freeze plugs are all good though.

[cadunkle]

So it froze? If so you can count on the block being trash too. Either buy a reman engine or pick up any ol' Vortec headded 350 and rebuild it yourself using the marine parts from your old one that you can salvage.

[csuggs]

Ouch! That hurts man. If it froze then you need to dig deeper before spending money on heads. I've seen frozen water do some pretty herendous damage. Maybe you can get a 409 to replace it?

Hey man, I hope you don't have to replace the motor. Let us know!

[beast 496]

Buy a brand new ZZ4 rotating assy and install your cam and lifter set, plus timing gears, chain. Cheaper and better than rebuilds. If the heads froze the block did too. Al

[michael hunter]

Good advice here frozen engine = replace engine

[mopardudes]

Hey guys thanks for all the help. I posted this on Wakeworld also and got nothing but snooty comments about leaving water in it instead of how to fix the problem. This is why I bought a Supra, you guys rock!

[beast 496]

Where are you located? If you are close to Northern Indiana, we can fit you up with a new rotating assy and heads. Don't leave the water too long inside or you will have more problems and higher cost's. Al

[cadunkle]

Also, since you ride year round it would be wise to drain the water out of the engine when done riding, even if you keep it in a heated garage. It only takes a few minutes to pull the drains and any hoses at low points.

[csuggs]

PCM ZR-409 - that's what I'm talking about! 6.0Litre and 409 ponies - bwaahahahaha
Actually, I like Al's idea for an inexpensive "new" motor. Makes sense.