Valves Breaking

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03-08-2008 | 02:30 PM

#21

blue thunder

Registered

Joined: Nov 2001

Posts: 3,393

Likes: 6

From: IBX

Oh yeah, and I have blown 3 engines due to valve head failure. Two due to water leaking into chambers from exhaust and 1 from an inferior valve (non inconnel) Ferria ever since w/ KE headers and no problems what so ever.

BT

03-08-2008 | 03:18 PM

#22

Strip Poker 388

Rob

Joined: Aug 2001

Posts: 21,637

Likes: 12

From: Ms

like bobl said maybe they replaced it with cheap valves?non inconnel.My old one out of my 500efi had manley on the side of the valves.

http://www.manleyperformance.com/stnvlvs.html

i think the #s are
11587-8
11562-8???

03-10-2008 | 09:11 PM

#23

Thunder Boat

Registered

Joined: Sep 2006

Posts: 23

Likes: 0

From: Lititz, PA

Quote:

Originally Posted by blue thunder

Interesting locale Thunder Boat. Same as me basically. Where do you boat? I thought I was the only perf boating in the area.

BT

We used to be over at Georgetown on the bay. We have been on Raystown in PA for a couple of years now.

03-11-2008 | 02:58 PM

#24

fastlane40

Platinum Member

Joined: Oct 2003

Posts: 788

Likes: 0

From: Townsville Australia

How can you be sure the head snapped off?When the valve seat drops out the mess that is left makes it almost impossible to tell.I lost a seat in a 502 and there was no valve head left.Much more common problem than a valve head snapping off.Causes,poor quality fuel and heat.

03-11-2008 | 03:55 PM

#25

Panther

Frank's Marine Service

Joined: Sep 2002

Posts: 11,959

Likes: 142

From: Elkton, MD

In addition to what else has been mentioned, have the valve guide clearance checked... I've seen valves hang open at WOT, kiss the piston and whammooo...cha ching!

Some get lucky and it bends, others..well not so lucky..