Reply to: RE>Snapped Crankshafts...
A TR4a owning friend of mine told me today how his crankshaft snapped
whilst doing a steady 80 mph on his way to Coventry. This is around
3,500 rpm on a TR4a. It broke between the flywheel and the back rod.
I'm told racing TR's have a low redline of around 5,500 rpm.
Is there a cure for this or is it a design feature ?? I suggested
nitriding the crank and having it the short motor balanced as
individual parts and then as a whole from fan to clutch. Are TR lumps
prone to this problem and is it an oil feed problem or are the cranks
weak ?
TR2-4 cranks ARE prone to this kind of thing. One reason, is that there is
no harmonic balancer on the front. There is a shop, "British Frame and Engine"
in Southern CA that sells a retrofit harmonic balancer for these cars. They
also have lots of interesting TR competition bits.
- Jerry Kaidor
p.s. I have no relationship with British Frame and Engine. I've never even
bought anything from them, just ogled the catalog!
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