I used to do it all the time on my MGB, which was a daily driver and
suffered the abuse of about 10-15,000 miles a year for the fifteen years
I drove it. This winter I will undertake the same thing with the TR6.
>From what I have read and from the people I have talked with, it's the
same thing on a Triumph
I always used a feeler guage to push the upper half of the bearing out,
careful not to scratch anthing. Lubricate the upper half of the new one
and slide it back in, careful to make certain that the little tab thingie
gets into its groove. (You can only take them out and put them in one
way, 'cause of that little tab.) I figure it's cheap engine insurance to
do it every 20-30,000 miles and it's not that tough. Seal the pan well
and nobody will know it's an LBC, 'cause it won't leak enough!
You can Plasti-Guage the crank to make sure that it's not too worn, but if
there is still a good surface on the old bearing, you should be fine.
'Course if you follow my advice and the whole thing blows up, I don't know
nothin'!! ;-)
If I'm wrong I'm sure someone will let us both know!
Take care and good luck
Michael
On Tue, 6 Oct 1998, Shane F. Ingate wrote:
>
> All,
>
> This weekend I am going to embark on a most perilous adventure;
> replacing big-end and main bearings in "Rags" to bolster poor
> oil pressure at idle (and preserve the crankshaft).
>
> I'm pretty sure I can do this (and new thrust washers and new oil
> pump) in situ, without having to remove the crankshaft.
>
> My plan is to use standard size bearings in my 75K mile motor; I'll
> be doing a major rebuild in 4 years (or 20K miles or motor-death,
> whichever comes first :) anyway, so I dont think there is a need to
> worry about oversized bearings, unless someone can convince me otherwise.....
>
> My real concern is replacing the upper shell of the main bearings;
> Many folk in the V8 world believe I may have a problem installing
> the new upper shells and getting them to seat correctly; their advice
> is to just replace the lower main shell. Does this sound like
> OK advice?
>
> Do folk have preferred source of vendors for bearings?
>
> Any other tips and gotchas?
>
> Thanks in advance....I'll write up the adventure (for this neophyte
> mekanik :) and let you all know how it goes.
>
> Cheerio, wish me luck!
>
> Shane Ingate in San Diego
>
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