This topic is mentioned a bunch, but I couldn't find a definitive thread comparing the two.
To be short, my head gasket blew, the head is off and I'm ready to bring it to the machine shop to get a valve job (regrinding valves/seats and installing new seals/guides). I called two shops in my area that came well recommended.
Shop A: Adjusts valves by "tipping" them; grinding a bit off the stem.
Shop B: Adjust valves by replacing shims.
I'm trying to decide which way to go and am looking for pros and cons for each. I'll start; from what I understand...
VALVE TIPPING****************************
+ Pro 1: Cheaper.
+ Pro 2: Faster turn-around time.
- Con 1: Grinding can remove the hardened coating of the stem to expose the non-hardened metal; thus introducing premature wear.
VALVE SHIM REPLACEMENT********************
+ Pro 1: Wear surface at cam/shim interface is renewed.
- Con 1: Shims are hard to find.
- Con 2: Shop charges are higher due to increased time and materials.
To be short, my head gasket blew, the head is off and I'm ready to bring it to the machine shop to get a valve job (regrinding valves/seats and installing new seals/guides). I called two shops in my area that came well recommended.
Shop A: Adjusts valves by "tipping" them; grinding a bit off the stem.
Shop B: Adjust valves by replacing shims.
I'm trying to decide which way to go and am looking for pros and cons for each. I'll start; from what I understand...
VALVE TIPPING****************************
+ Pro 1: Cheaper.
+ Pro 2: Faster turn-around time.
- Con 1: Grinding can remove the hardened coating of the stem to expose the non-hardened metal; thus introducing premature wear.
VALVE SHIM REPLACEMENT********************
+ Pro 1: Wear surface at cam/shim interface is renewed.
- Con 1: Shims are hard to find.
- Con 2: Shop charges are higher due to increased time and materials.
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