Head Experts - Combustion chamber damage
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Head Experts - Combustion chamber damage Greets all,
I just need some opinions on the damage to a combustion chamber on a set of stage II ported heads.
The last 2 pictures are the exhaust and intake valves from that chamber. The exhaust valve was visibily bent and would not sit flush. I installed a different exhaust valve as you can see in some of the terrible pics and on eyeball inspection it seated fine and there does not appear to be any actual damage to the valve seat.
There is some material off of the plug hole, and a couple of gouges in the chamber face, like something let go on that cylinder.
I just need some opinions on the damage to a combustion chamber on a set of stage II ported heads.
The last 2 pictures are the exhaust and intake valves from that chamber. The exhaust valve was visibily bent and would not sit flush. I installed a different exhaust valve as you can see in some of the terrible pics and on eyeball inspection it seated fine and there does not appear to be any actual damage to the valve seat.
There is some material off of the plug hole, and a couple of gouges in the chamber face, like something let go on that cylinder.
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All I have are the heads, I did not get to look at the engine (wasn't my engine).
The springs are in great shape, they are Comp 978 duals with around 4k miles. My basic opinion was they would be fine, just need some machine work. I got them for a great price.
They are Absolute Speed Stage II 241 castings with Manley 2.02/1.575 int./exh... Manley valve kits are around $100 a set so I planned on brand new valves all around.
The springs are in great shape, they are Comp 978 duals with around 4k miles. My basic opinion was they would be fine, just need some machine work. I got them for a great price.
They are Absolute Speed Stage II 241 castings with Manley 2.02/1.575 int./exh... Manley valve kits are around $100 a set so I planned on brand new valves all around.
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Originally Posted by 2002blackZ
Did the spark plug come out in one piece from that cylinder?
The exhaust valve was bent and the intake valve was scored but not bent. The face of the combustion chamber has some gouging/scoring and the material missing from the plug hole base...
To Azrael, your head is fine. Any semi experienced tig welder/machinist could have that fixed in a couple of hours. Probably going to run you around $250. I have fixed way worst than that, and would fix it for you, but I dont have time to mess with heads anymore. Good luck.
Brandon
Brandon
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Yeah, they dont look too bad at all. could probably clean up the CCs yourslef with a dremel and some polishing compond, just to get rid of any places for carbon hotspots to form. Youd want to try and do the same on all cylinders though for uiformity.
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Originally Posted by GuitsBoy
Yeah, they dont look too bad at all. could probably clean up the CCs yourslef with a dremel and some polishing compond, just to get rid of any places for carbon hotspots to form. Youd want to try and do the same on all cylinders though for uiformity.
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Thanks all, I have them at the machinist now, and the cost is very close to what Brandon suggested $280 for the fix, full valve job, and assembly. I am just waiting for the Rev valves I ordered...
Originally Posted by KsMySS
Yah that what happens when a piston basically disengrates in the bore. But i just got them in the mail today from patriot and they are perfect fixed for cheaper then i thought was possible.
Thanks to Gunnar and Patriot for that great fix.
Thanks to Gunnar and Patriot for that great fix.
Glad we could help you out.
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Originally Posted by PREDATOR-Z
If they had bent valves I would change valve guides as well while you are in there.
Why take a risk of those smoking afterwards. Put some nice bronze guides and you got nice new heads.
Why take a risk of those smoking afterwards. Put some nice bronze guides and you got nice new heads.
