Cooper S block & main bearing cap markings

[Andrew1967]

I have just brought home an S block without main bearing caps BUT I have also found a set of matching stamping caps.

Is the block stamped anywhere to correspond (hopefully) with the cap stampings ?

Cheers

Andrew

[Peter Laidler]

I'm not sure I really understand Andy. If you brought this block from someone in, say Leeds and you have have a set of caps in your garage in Dorset, then the chances that they are a matched block/caps pair are so remote as to be........... well.... Do you do the lottery often?

I could have got this wrong or mis-read it but caps and blocks are machined/matched sets

[Andrew1967]

They came from the same place/person Peter but the block was here and the caps were there, if you get my meaning.

I was under the impression (maybe incorrectly) that the block is stamped somewhere with the same number as the caps to ensure they are matched.

[smithyrc30]

The block is stamped by the water pump at the tappet chest side near the head face, so if you are looking directly at the timing gear face of the block, it is stamped in the upper right corner on a small machined area. Well it is on the two S blocks in the garage...

[Andrew1967]

Thanks Simon, I'll check it out

[Cammsjb]

IMG_2995.JPG

Similar to this?

[Andrew1967]

Struggling to find anything

[Andrew1967]

Found it....stamped on the face that would be the mounting face for a manual fuel pump.

Best thing.... the number matches the caps

[251 ENG]

Does the number start with 1P ?

[Andrew1967]

Yes it does Simon...... does that signify anything

[rich@minispares.com]

its what simon would pay for it.....


I think for safety's sake I would get it checked / line bored if required


what sort of idiot looses the caps of a perfectly good s block...

[Andrew1967]

its what simon would pay for it.....


I think for safety's sake I would get it checked / line bored if required


what sort of idiot looses the caps of a perfectly good s block...

[251 ENG]

Always room for one more

[Andrew1967]

Now now, that's greedy

So is there any significance in the '1P' Simon apart from its value

[251 ENG]

What's the full number might be able to give you a rough date

[Andrew1967]

I was wondering if they could be dated by the numbers Simon

1P 3473

[251 ENG]

Somewhere between august 66 and April 67 .

I would estimate about October 66

[Andrew1967]

Thanks Simon

When I take the engine off the box of the unit I got with he car, I'll let you know those numbers

Cheers

Andrew

[CooperTune]

The one I have here at the house is marked P 5209 with the matching caps thin flange. It has always seemed to me the S blocks were line bored at the factory and left with the machining marks unlike the A+ blocks which appear to have been finished with a hone. I know some shops offer align honing, I have always worried about stone and shoe wear. Due to the length of the mandrels the small areas to be honed and spacing the operator has to be really good and the mandrel dressed properly. Steve (CTR)

Can you date this one?

[251 ENG]

P5209 , would say car build date early 1965