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Doug Zielke's Avatar
 
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Quote:
Originally posted by Siena911
Lo and behold I have a spun bearing on Cylinder three.
The crank journal and conrod look pretty well scored up ....
Jakes,
Please post a few sharp images of the carnage. It would be greatly appreciated. And best of luck with the re & re.
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Old 05-13-2004, 06:24 PM
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No worries!!!!

You guys want carnage, I will show all this weekend. It's meant to be good weather as well, so I will be starting early, lookout for pics sometime this weekend.

Cheers Jakes
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Old 05-14-2004, 01:47 AM
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Finally!!! The moment of truth.

The oooh and aaahhh moment, when the case halves are separated.



Now for the carnage that you guys were after. Number three is completely trashed, there were only slivers of bearing left. As you can see the conrod and crank are pretty well scored up. I have posted a pic of the rest of the bearing shells 1 thru 6 from left to right.




[img]
http://forums.pelicanparts.com/uploads2/Jake_Exhau1084868361.jpg[/img]



I was really surprised as to how trashed they look as well. I am not too sure as to how much of that is due to contamination of the oil when No three went. Number six looks like it was beginning to lose some of the material that covers the brass/copper looking material.


I am going to try and strip the rest of the stuff by the end of this week and hopefully get it to the machine shop by the end of next week.

Cheers Jakes
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If you want to run with the big dogs, you can't pee like a puppy!!!

92 Rover Metro 1.1 (54 manly horsepower) - Dont knock it it does 60 mpg!!!
81sc / 3.2 litre transplant (Broken BIG Time )
SCWDP deserter - HP junkie wannabe
Old 05-18-2004, 01:21 AM
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I didnt pick up any issues while driving?? I think the reading was around 3, It was a long time ago, but when it happened and I felt the slight hesitation, whilst scanning the gauges, the only one that caught my attention was the temp which was elevated by a couple of mm from normal.

Could a blockage have caused starvation?

Any clues as to what to look out for.

Cheers Jakes
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If you want to run with the big dogs, you can't pee like a puppy!!!

92 Rover Metro 1.1 (54 manly horsepower) - Dont knock it it does 60 mpg!!!
81sc / 3.2 litre transplant (Broken BIG Time )
SCWDP deserter - HP junkie wannabe
Old 05-18-2004, 02:13 AM
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How many miles on the motor? I have an 84 3.2 and spun the same bearing at 118,000 mi. I couldn't find a cause I just figured too many hard track miles. I had a hard time finding a replacement crank so I had my old crank repaired and I used a used con rod that weighed the same as my other ones. Had my heads rebuilt and the pistons and cylinders were in excellent shape so I reused them with new rings. The motor runs excellent with at least 5000 track miles. The total cost was very reasonable including the wile you’re there stuff.

Tim
Old 05-18-2004, 06:19 AM
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You're a good man, Jakes.
Thanks for those delectable images of destruction.
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Old 05-18-2004, 07:34 AM
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Quote:
I'd guess oil pressure problem...
too high? too low?
Old 05-18-2004, 07:52 AM
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Tim L, I'm not sure how many miles on the motor, as the previous owner had an engine swap done.

Doug, you made me chuckle. Have you seen any images that were too much for you yet

Sonic. Can too high a pressure cause problems like this?

What I'm really hoping for is that I can find out exactly what caused the problem. It would drive me nuts not knowing what the cause was.

Thanks guys

Jakes
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If you want to run with the big dogs, you can't pee like a puppy!!!

92 Rover Metro 1.1 (54 manly horsepower) - Dont knock it it does 60 mpg!!!
81sc / 3.2 litre transplant (Broken BIG Time )
SCWDP deserter - HP junkie wannabe
Old 05-18-2004, 08:37 AM
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How do the pistons and cylinders look? I doubt you will find any thing out of the ordinary. The bearing was probably going bad for some time and you only heard it when it was completely gone.

Tim
Old 05-18-2004, 09:12 AM
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Tim,

I still need to clean them up and have a decent look at them. At first glance I could still see the honing pattern on the cylinders, which I suppose is a good sign.

I will clean them soon and post pics.

What did you do wrt the oil cooler. Did you clean or replace it?

Cheers Jakes
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If you want to run with the big dogs, you can't pee like a puppy!!!

92 Rover Metro 1.1 (54 manly horsepower) - Dont knock it it does 60 mpg!!!
81sc / 3.2 litre transplant (Broken BIG Time )
SCWDP deserter - HP junkie wannabe
Old 05-18-2004, 09:57 AM
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What the hell does "spun a bearing" mean?
What bearing, and 'spun'?
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Old 05-18-2004, 10:17 AM
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Kurt,

The way I understand it is that the bearing (caps, half moon shaped thin pieces) remain stationary within the conrod. When there is an oil starvation or blockage the bearing starts to seize. when it does it starts binding to the crankshaft and the whole bearing starts turning within the conrod, thus damaging both the conrod and the crankshaft, as can be seen by the pics above.

On one of the other conrods in my car the conrod big end surface (where the bearing sits) is smooth and you can still see a cross hatch pattern on it.

Hope this makes some sense.

Cheers Jakes
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If you want to run with the big dogs, you can't pee like a puppy!!!

92 Rover Metro 1.1 (54 manly horsepower) - Dont knock it it does 60 mpg!!!
81sc / 3.2 litre transplant (Broken BIG Time )
SCWDP deserter - HP junkie wannabe
Old 05-18-2004, 10:49 AM
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Nice work Jakes! Now all you've got to do is fix it!

Cheers,

Tim.
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Old 05-19-2004, 01:49 AM
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