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Old 19 January 2009, 10:21   #41
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Originally Posted by Jono Garton View Post

A few months later I get a phone call to say the prop shaft is a few thou out and its thrown a con rod out the side of the crank case.

But what should I do?

Rock: Jono :Hard Place
What I am trying to get my hear around is how can a prop shaft being a few thou out cause an engine to throw a rod?

The vibration would have to transfer through the gears and up the drive shaft and onto the crank which is in its own bearings, and even if it did induce some kind of vibration I would have thought it would still struggle to cause this sort of effect?

It either got something in there, it seized, or there was a spontaneous failure of some sort .................

............... All IMHO!
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Old 19 January 2009, 11:08   #42
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short of opening the engine up for inspection there is no way of knowing that a smallend, bigend or piston is on it's way out, it would be nice to know what actually caused failure once they strip it down, perhaps thats what they should do now, maybe something completely out of the ordinary that happened then maybe barrus could help
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Old 19 January 2009, 11:50   #43
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What has the person you were brokering the engine for got to say......was it Sidmouth Lifeboats?
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Old 19 January 2009, 12:29   #44
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I'm with Cookee. I don't see what a few thou runout at the propshaft has to do with crankshaft/bigend/conrod failure.

I also can't see a relationship between a DDT readout and a conrod or propshaft.

We need full, correct information if this is to be judged properly.
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Old 19 January 2009, 12:51   #45
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time to get the spanners out me thinks!
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Old 19 January 2009, 17:10   #46
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I wonder what Barrus have to say on it all. Does anyone know if they're involved? Turbodiesel?
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Old 19 January 2009, 17:49   #47
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Having been following this thread, it seems to be dragging in a lot of people unnecessarily. At the end of the day it's between Jono and Jamie and possibly the original seller. I tend to think it should be between the buyer and seller to sort out. We all know that barrus offer excellent service on border case warranty issues but is it really down to them to sort out. I think it was bad luck on Jamie's part but may be if the owner that Jono was acting for as a broker for had a conscience, then may be he would offer a good will gesture.
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Old 19 January 2009, 17:55   #48
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Having been following this thread, it seems to be dragging in a lot of people unnecessarily, and I didn't want to miss out.
I fixed it for you...
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Old 19 January 2009, 19:06   #49
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Quote:
Originally Posted by Cookee View Post
What I am trying to get my hear around is how can a prop shaft being a few thou out cause an engine to throw a rod?

The vibration would have to transfer through the gears and up the drive shaft and onto the crank which is in its own bearings, and even if it did induce some kind of vibration I would have thought it would still struggle to cause this sort of effect?

It either got something in there, it seized, or there was a spontaneous failure of some sort .................

............... All IMHO!
Yep-though if a bearing in the gearbox broke up and the gearbox suddenly jammed at high revs the shock carried through to the powerhead could break a rod.

Following that on though, then there'd be swarf in the lower unit and it'd be obvious.
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Old 20 January 2009, 02:37   #50
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I fixed it for you...
Thanks for that. I feel a lot better now
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