Topic

I am converting my 135 to a 160. I needed to take the crankshaft out to be able to remove the no1 liner which was solidly in place. The others nearly fell out. Having got the crankshaft out I am considering replacing the main bearings. I have a set of 160 Pistons, conrods and liners so I need to consider bearings for them too.

My Crankshaft has 11111 and BBBB markings. My crank ladder has BBBBC and my Pistons are marked 6A.

I think that means that the first 4 bearings are Blue/Green and the rearmost bearing is green/green. For the big ends it looks like Blue/Blue.

Can anyone confirm or correct my deductions?
Are the 160 cranks different from the 135 version? I didn't think so but doubt has been cast.
Thanks in advance

Sorry I can't help much but I think the cranks are the same, a part number search on Rimmers may answer for sure.

They should also be able to supply O/E spec bearings.

There is only 1 crankshaft quoted in Rimmers. The differences appear to be the Pistons. Bearings may be thicker as big ends are A on the Pistons I have. These replace C big ends. I think that means the bearings are thicker but Im not confident yet.

Sorry Dicky, can't add anything to the discussion on this.

All most sure pistons,bearings & conrods are up rated on the 160 but nothing else

I'm off to the engineering shop to check with them.

Post up your findings. It'll help someone in the future.

All K-series bottom ends were standardised to 160 spec by the time Euro2 engines were released - the only different one being the 1.8T, and I gather that there had been plans to standardize on that bottom end, but the company went belly up before that could happen.

Therefore I think that you probably have the best bottom end already - and although marginal at 100bhp per litre, should be fine. The next upgrade step would be forged pistons and rods; the crank is usually good for even higher power and rpm than you've currently got (probably around 220bhp, 8500rpm cut off).