If the interference fit is correct, a puller only should be necessary for removal.
Heating the hub to about 100C (212F) for installation.
Åke

 

Correct.

 

Is there an install/remove procedure documented anywhere please? Have searched to no avail.
As an aside a little relevant due to mention above of main bearing damage caused by poor harmonic damping, there is an interesting read on Jag XK engine issues here - http://www.jagweb.com/aj6eng/xk-engine/page6.php
Oval journals anybody? No mention of the damper being considered.
jp 83 Euro S AT 57k

 

jpitman2, 928 crankshafts have proven to be quite robust. Barring catastrophic failure, the main and rod journals rarely wear. The bearings take the brunt.

 

6.5.0


And wear, we're not special here.

 

Sorry, dont see the relevance of this observation? Did you read the Jag item - they made the journals oval on purpose?
jp 83 Euro S AT 57k

 

JP,

Seems to be some confusion here- the journal is the crank part of the bearing, the shells were made with some degree of ovality or at least that is my understanding for whatever it is worth. . This is common on big industrial machines wherein the ovality is used to pump the oil around the bearing or so I understand.

No idea if this is common on automobile engines or not. Bearing dynamics, especially in big end bearings are very complex - something of a dark art. The entire point of having shell bearings is to have a replaceable wear element stemming from the days when big ends and mains did not last too long. When I first started riding British motorcycles in the early 70's "big end" failures were more or less "expected". If the bearing does fail in service both the shell and the journal are invariably damaged as evidenced by TBF on the auto's - that is truly catastrophic as in terminal for the engine given the web cracking that invariably goes with it- no lube oil can withstand such "trauma".

.

 

Fred,
I understand what journals and bearings are. If you read the info at the link, a Mr Bywater who worked at Jaguar tells about them making the MAIN JOURNALS oval on purpose to try to change the note produced that resonated with the body of the Mk X cars. Considering discussion above about effects of poor harmonic balancers on main bearings, it seemed a little relevant to me.

Why is it that whenever I post a question, and another comment, nobody answers the question? Not even to say "Dont know"?

jp 83Euro S AT 57k

 

JP,

It is a very interesting article and I seem to remember reading this article earlier when researching info about my 1996 Vee12 Daimler Century that is due a major rebuild.

The article states clearly that they made the big end bearings oval and in 1978 fatally went to round shell bearings to reduce costs.

Apologies if I missed something here

 

jpitman2, please accept my apologies, I completely misinterpreted all of that.
Consider me chastised.

 

When you get your balancer from Greg, it should come with printed instructions.

 

Yes, they do....although removal is not part of those instructions, but assumed to be logical.

 

Not being snarky, but in my experience when somebody ASSUMEs something, it makes an *** out of U and ME. From the above, is it safe to ASSUME that removal of the balancer, some heating of the hub and a puller will get the hub off undamaged, and suitable for a re-instal? Trying to avoid any chance of getting into something that is beyond my skill level.
jp 83 Euro S AT 57k

 

I've just used a standard hub puller you find at Autozone, although mine is slightly nicer than those, they should work. No heat required on the two I took off.

 

I’ve used heat in the past: when you think you need a cheater to turn the puller... you need some heat.