Hello and help!
At 80k, I figured I'd better do my second check.
I had a total of six valves that needed to be fixed: both intake on #4, 1 intake and both exhaust on #1, and one exhaust on #3.
Fine.
Got the hotcam shim kit, all is good.
Intake valves are no problem. I'm able to match a hotcam replacement shim almost to the thousandth of a millimeter.
My exhaust valves, however, are another issue.
Using the formula in both the Haynes manual and Honda shop manual, I get replacement shims of the size .106-.108 mm. What?!?!?!
Before I cracked the valve covers, I measured every clearance twice, to ensure I was getting the same thing, so I'm quite positive on the clearance numbers.
I double checked the shim I pulled out with a micrometer, so I'm positive on those values.
The numbers:
Cylinder #1, L hand exhaust valve (as you face the valves)
Clearance: .203
Old Shim: .153
Spec: .250
new shim=(measured - spec) + current shim
.106=(.203 - .25) + .153
The smallest shim I can find is a .120.
Any ideas/thoughts?
At 80k, I figured I'd better do my second check.
I had a total of six valves that needed to be fixed: both intake on #4, 1 intake and both exhaust on #1, and one exhaust on #3.
Fine.
Got the hotcam shim kit, all is good.
Intake valves are no problem. I'm able to match a hotcam replacement shim almost to the thousandth of a millimeter.
My exhaust valves, however, are another issue.
Using the formula in both the Haynes manual and Honda shop manual, I get replacement shims of the size .106-.108 mm. What?!?!?!
Before I cracked the valve covers, I measured every clearance twice, to ensure I was getting the same thing, so I'm quite positive on the clearance numbers.
I double checked the shim I pulled out with a micrometer, so I'm positive on those values.
The numbers:
Cylinder #1, L hand exhaust valve (as you face the valves)
Clearance: .203
Old Shim: .153
Spec: .250
new shim=(measured - spec) + current shim
.106=(.203 - .25) + .153
The smallest shim I can find is a .120.
Any ideas/thoughts?