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I've been sitting on this F20C Cylinder Head since my engine blew 3 years ago. (valve spring worn, didnt pull valve up in time, valve snapped after making contact with a piston).
Is this worth selling it to someone so they can repair it - or should I just recycle this piece.
I have a new engine in the car, so I have no use for this head.
Melt it and sell it as aluminum scrap, honestly I don't know how you could fix that combustion chamber. Impossible to weld aluminum to it, the metal is too contaminated. How did the valve spring fail? Or was it a cracked retainer?
You can repair that but it will far exceed the cost of replacement. Looks like garage art to me!
How? Look at all the pitting on the combustion chamber, valve seat is destroyed, only way to do it is to weld aluminum to the chamber and machine it into the exact same shape, along with new valves guides all around as it seems the other combustion chambers have all burned valves. Furthermore welding dirty aluminum never comes out right and that CC is beyond contaminated.
This was on an all original 240k mile f20c. I went into vtec in first gear, and heard a noise, and put it into neutral and coasted home. It would not turn over after.
I took the spark plug out, and it was smashed and I could see the valve head was jammed into the piston. The valve didn't drop, as the valve spring/retainer/valve was still in the cylinder head. Just the flat head of the valve was broken off and lodged into the piston.
This occuring right as I go into VTEC, means that my valve spring were probably worn and VTEC (valve open longer) probably made contact with valve and piston.
It was funny, the pieces had gone into the intake manifold, and then back out into other cylinders.
This engine did not have an easy life, as it was eating a quart a week and I knew end was near, but still took it to 9k every chance I got.
Either way, I will probably just clean it and put it as a desk ornament or something. LOL
How? Look at all the pitting on the combustion chamber, valve seat is destroyed, only way to do it is to weld aluminum to the chamber and machine it into the exact same shape, along with new valves guides all around as it seems the other combustion chambers have all burned valves. Furthermore welding dirty aluminum never comes out right and that CC is beyond contaminated.
You just explained it yourself. It's not difficult to clean up aluminum, you have to do the same when welding up any used head.
This was on an all original 240k mile f20c. I went into vtec in first gear, and heard a noise, and put it into neutral and coasted home. It would not turn over after.
I took the spark plug out, and it was smashed and I could see the valve head was jammed into the piston. The valve didn't drop, as the valve spring/retainer/valve was still in the cylinder head. Just the flat head of the valve was broken off and lodged into the piston.
This occuring right as I go into VTEC, means that my valve spring were probably worn and VTEC (valve open longer) probably made contact with valve and piston.
It was funny, the pieces had gone into the intake manifold, and then back out into other cylinders.
This engine did not have an easy life, as it was eating a quart a week and I knew end was near, but still took it to 9k every chance I got.
Either way, I will probably just clean it and put it as a desk ornament or something. LOL
Valve spring failure on an s2k? Gotta be the first time I've ever heard that happen, wouldn't be surprised if the valve clearance had gotten so tight it allowed the valve to make contact with the piston in VTEC. Then again stranger things have happened.
04-13-2017, 12:33 PM
should I toss this Damaged Cylinder Head?
It's not difficult to clean up aluminum, you have to do the same when welding up any used head.