I didn't ask about the tolerances. I simply trusted the machinist.
Because of personal recommendations, I took the head to Automotive Precision
Machinery in Atlanta. The bill was about $600 for re-surfacing the head and
3 angle and assembly. This did not include parts. Upon disassembly, I found
the valve seats single faced.
They had the crankshaft nitrited and upon assembly I found it not true. I
took it back and they heated it and bent it back to what seemed like perfect
to me. I don't know if that's normal but watching your crankshaft visibly
bent is like watching sausage being made....or worse, watching an abnormal
sex act.
I would not recommend them to others.
Richard Taylor
TR-4 #196
-----Original Message-----
From: Tim Murphy [mailto:timmurph@fastbytes.com]
Sent: Wednesday, August 29, 2012 7:39 PM
To: 'Richard Taylor'; FOT@autox.team.net
Subject: RE: [Fot] Wrist Pin / Piston Slap
Just out of curiosity (and not to start another thread on valve guide
clearance:)) what clearance were you running with the bronze guides?
Tim
-----Original Message-----
From: fot-bounces@autox.team.net [mailto:fot-bounces@autox.team.net] On
Behalf Of Richard Taylor
Sent: Wednesday, August 29, 2012 6:24 PM
To: FOT@autox.team.net
Subject: Re: [Fot] Wrist Pin / Piston Slap
At Road Atlanta, I had #4 exhaust valve bond to its bronze sleeve. The head
has new valves and guides and is back on the engine. Now, at an idle, there
is a wristpin (or piston slap) apparently damage caused when the two
elements united and was unlocked by the piston. Above 1250 RPMs, it goes
away. My thought is to simply put in a new piston, rings, wristpin and
connecting rod.
If it is that simple, where can I order just one 89MM piston/wrist
pin/connecting rod?
Richard Taylor TR-4 #194
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