Identifying 1275 engine

[philthehill]

Off set bore to 0.040" if you can or the bores allow.

MG Metro cam will work well.

[andrew.searston]

Brilliant thanks for the help. Do you know the cam number for mg metro. Is it the turbo cam

[andrew.searston]

What do you think to these, can I use the original cam followers as they look in good condition

[ampwhu]

interesting as I looked at the camshaft I have today and can't find any part number on it. it does look like the pictures above. is there anyway of identifying what it is I have got?

[philthehill]

Out of the two cams posted above I would go for the 264 Evo.
http://www.retrominisltd.co.uk/index.ph ... ts_id=1251
If you have access to the Vizard book it gives very good descriptions (with timing figures)of many of the cams currently available and how to identify BMC cams. Most aftermarket - if not all have the numbers stamped on the front or rear end.
Even though your cam followers look to be good you should never fit used cam followers to a new cam. Cam followers wear to the cam and if put to a new cam will rapidly wear the cam lobe with ultimately drastic results. Cam followers are cheap compared to a new cam.

Make sure that you replace the oil pump and it is suitable for the camshaft. The oil pump is the beating heart of the engine.

ampwhu
All the camshafts look the same but there are distinct difference between them - see the Vizard book for the different markings.

Put a few photos of your camshaft on here and between us we may be able to identify it.

Phil

[ampwhu]

hello Phil, I didn't forget about this but have just managed to get to my parts to get a picture of the camshaft.

1275 camshaft1.JPG (31.6 KiB) Viewed 711 times

1275 camshaft2.JPG (27.31 KiB) Viewed 711 times

as mentioned, i can't see any markings on it. Would you have an idea from the pictures?

[philthehill]

From what I can see you have a standard 1275cc camshaft.

[ampwhu]

on a 0.020" bore, I've been told that makes it 1293cc, is that ok?

I dropped the block off today to the engineer shop. I also collected a standard 12G940 from ESM on exchange as well.

i'm after a road going engine with a 3.7 diff (I have the diff)

[ampwhu]

thought of another question. the oil pump off the old engine had 4 screws holding it on. it's a star drive. new ones seem to have 2 screws holding them on. is that sufficient?

[philthehill]

The two bolt oil pumps became de-rigour on later 1275cc engines.
There should be no problems encountered.

http://www.minispares.com/product/Class ... o%20search

[ampwhu]

still on the subject of pumps. Would a mechanical pump supply enough fuel for a Hif carb on a 1275 engine? or is it better using the SU electric pump. I seem to recall the 1500 midget using a mechanical pump.

[philthehill]

There should be no problem with using a mechanical pump even with a Hif carb.
If you do fit a mechanical pump make sure that you include the spacer that fits between pump and block.

[IslipMinor]

One big advantage of the electric pump is that it primes the carburettor ahead of starting the engine. With a mechanical pump the engine has to be turned over a number times on the starter to fill the float chamber. Probably not a problem with a car that is regularly used, but after a week or so, there is not likely to be much fuel left in the float chamber. I would stick with the electric pump because this.