Offshoreonly.com - Need engine advice N A 598 cubic inch rebuild

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- - Need engine advice N A 598 cubic inch rebuild (https://www.offshoreonly.com/forums/general-q/318685-need-engine-advice-n-598-cubic-inch-rebuild.html)

SB	10-13-2014 06:50 PM

Check the intake manifold and the other bank of cylinders for the missing valve head. Them damn things have a habilt of traveling around in areas you wouldn't believe.

the mayor

10-13-2014 07:00 PM

Link pic of the head I don't have pics of the piston with me.

http://i927.photobucket.com/albums/a...929_204943.jpg

the mayor

10-13-2014 07:07 PM

Head
http://i927.photobucket.com/albums/a...G_00000805.jpg

GPM	10-13-2014 07:10 PM

Wow, what a mess, is the head cracked between the cylinders

the mayor

10-13-2014 07:14 PM

Quote:

Originally Posted by GPM (Post 4202349)

Any clue what brand valves they are,

Tried to figure that out. Internet search turned up nothing. C - BH 1201 on the stem. My memory is not real good and I do not have it with me so I think that was the number.

the mayor

10-13-2014 07:20 PM

Quote:

Originally Posted by GPM (Post 4202365)

Wow, what a mess, is the head cracked between the cylinders

I don't think so. I have had a couple people look it over and said it is repairable. The area between the chambers is smashed the head gasket broke there. So they think the head lifted and slammed back down.

brian41

10-14-2014 06:29 AM

3rd chamber.....looks like this cylinder head has been in this rodeo before

Budman II

10-14-2014 10:23 AM

Quote:

Originally Posted by the mayor (Post 4202369)

Tried to figure that out. Internet search turned up nothing. C - BH 1201 on the stem. My memory is not real good and I do not have it with me so I think that was the number.

Ferrea lists a PN 1201 for their 1.88 exhaust valves - not sure if they are inconel or superalloy, but $33 price indicates that they may be.

http://www.ferrea.com/Big-Block-Engine-Valves/p34231

FWIW, REV lists a CL 1201 as a Duramax inconel exhaust valve. Not sure if they interchange.

http://premiumparts.ee/work/rev-valves?lang=en

Borgie

10-14-2014 11:05 AM

Quote:

Originally Posted by the mayor (Post 4201865)

It dumps into the tail pipe not out side the boat. I always called these wet. I could be wrong???

Yes it's refferred to as "dry to the tip", not the same as a traditional wet exhaust.

MILD THUNDER

10-14-2014 11:09 AM

The ferrea super alloy is a great valve

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