V12 5spd conversion - premature clutch throwout bearing failure?
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Clarification: The input shaft can be stabilized one of two ways:
1) A bronze *bushing* that is a solid piece, press-fit into the center of the crankshaft, that has a few thousandths clearance to the tip of the transmission input shaft.
2) A roller *bearing* that supports the input shaft tip. That presses into a machined shoulder in the face of the crankshaft boss that the flywheel mounts to (as depicted in the picture above)
1) A bronze *bushing* that is a solid piece, press-fit into the center of the crankshaft, that has a few thousandths clearance to the tip of the transmission input shaft.
2) A roller *bearing* that supports the input shaft tip. That presses into a machined shoulder in the face of the crankshaft boss that the flywheel mounts to (as depicted in the picture above)
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Yes, good advice. Thanks!
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From: LA
Too much side shake on the pilot shaft is guaranteed to make the TO have intermittent and sometimes constant pressure directly on to the splines. A new bushing should line things up back to spec. Its a wear item so I doubt the shop is responsible for it, couldve been within spec during the install due to it being within tolerance.
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Senior Member
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Too much side shake on the pilot shaft is guaranteed to make the TO have intermittent and sometimes constant pressure directly on to the splines. A new bushing should line things up back to spec. Its a wear item so I doubt the shop is responsible for it, couldve been within spec during the install due to it being within tolerance.
Yes the pilot bushing is a wear item, but the pilot bushing has only 10k km on it, so if it's the cause of the TO wear then something was not quite right with the installation.
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Bob_S
MKI / MKII S type 240 340 & Daimler
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Oct 12, 2021 05:43 PM
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