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crankshaft woes
generaldogsbody - 3/6/15 at 12:38 PM

I have two pinto 205 blocks,one block the bores are no good.The other the cranks no good,so have put the good crank on the good block.I have put a new set of std shells in,Tapped all the caps in place and it turns nice by hand until i tap no 5 cap down.Then it won't turn by hand,but will using a spanner.But when i nip it up you cant even turn it with a spanner,so i can nip 1-4 caps up all is fine,nip no5 up and it won't turn.Any advice please.ps all is clean and mollied up.Just can't see whats wrong.

Dick - 3/6/15 at 01:46 PM

Take the crank back out and remove the bearings from the block and the cap it sounds like you may have some crap between the bearing and the block or the bearing and the cap

avagolen - 3/6/15 at 08:27 PM

I would also check that all of the shells are the same size.

Sounds like the problem I had with a beetle crank when the box of main bearings was labelled wrong.

generaldogsbody - 4/6/15 at 01:49 PM

quote:
Originally posted by Dick
Take the crank back out and remove the bearings from the block and the cap it sounds like you may have some crap between the bearing and the block or the bearing and the cap

Have checked and double checked,it seems to start stiffening up when i nip no4 cap up,and with no5 nipped up,no chance of turning it.Is there such a thing as a bent crank,and is a std 2.0l crank the same spec as a 205 crank.Cheers.

dave_424 - 4/6/15 at 01:52 PM

Yes cranks can be bent, one of my Motorsport engineering tasks at uni was to carry out a full inspection on a zetec engine, turned out to have a bent crank.

DW100 - 4/6/15 at 01:55 PM

No chance you have got the caps mixed up from one block to the other? Or wrong way round or on the wrong journal?

Are you using the bearings that matched the crank?

generaldogsbody - 4/6/15 at 02:26 PM

quote:
Originally posted by DW100
No chance you have got the caps mixed up from one block to the other? Or wrong way round or on the wrong journal?

Are you using the bearings that matched the crank?

No,i made sure of that,and they are new std bearings,everything is good as it should be from 1-3 no4 gets noteably stiffer and when i nip no5 then it wont turn at all.Thats why i think its the crank .I did,nt get chance to test the engine the good crank came off because the crank was already out.Anyway am peed off with it so gonna leave it alone for now,and fix my steam cleaner while weathers good.Thanks.

coozer - 4/6/15 at 03:54 PM

Set the crank on a couple v blocks rotate and check it with a DTI.