Crankshaft pulley for a BMC 1.5 diesel

I'm trying to source one of these which are a bit like hens' teeth.

Given this diesel engine is a variant of the B-series 1500 engine, are there any "compatible" pulleys from the other Austin/BL/Morris range?

Reply to
Fredxx
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These engines are /amazingly/ common in marine use - usually under the Thorneycroft or BMC label. Might be worth trying a marine engineer, though be warned that any component in marine use will be more expensive than the equivalent bit in any other use..

Reply to
Andy Breen

The engines are very common in the narrowboat scene but the pulleys don't seem to be or command a high price. I was hoping to hear anyone's experience of compatibility as I've heard conflicting stories.

Many thanks for your reply.

Reply to
Fredxx

Diesels like this have a much lower maximum RPM, so the gearing of waterpump and generator may well be different from the petrol version - but just how this might be implemented I don't know. I do remember having a crank pulley on a B Series begin to fail - the rivets holding the pulley to the boss came loose.

Reply to
Dave Plowman (News)

They also have a harmonic balance. My MGB has one and the Austin 1800 etc

Reply to
Rob

Any chance the OP could give us the measurements of the pulley? A photo might be helpful. My thinking is that this must have been a pretty standard item, or made up from standard bits - I'd be very surprised if this was a "custom made" part for this one particular application. Also, what happened to the original one? Was it missing from your engine, or as Dave hinted, perhaps the rivets have come loose - in which case it is repairable. Let's have the back story!

Regards,

GMacK

Reply to
Geoff Mackenzie

The crankshaft pulley on the BMC 1.5D appears a solid affair with a heavy mass of metal in front of the v-pulley. It doesn't appear to incorporate a rubber damper I've seen on some A-series engines. I've never worked on B-series before and so have no idea what variants are available. There are no rivets.

The reason I need one is because I don't want to disrupt the current use of the engine whilst I try and fit a second alternator to the engine.

Reply to
Fredxx

Just had a look at a photo I have and I believe it does have a damper which accounts for the "heavy mass"!!

Reply to
Fredxx

The rubber in the damper is not readily visible on those tts only thin.

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Reply to
Rob

See why Fred wants an alternative...

Reply to
Dave Plowman (News)

Did you say this because of the price of a new unit from Moss?

The one on my B is still original and that's 1962.

r
Reply to
Rob

Yes.

They're not really a service item which can push the price of new parts up.

Reply to
Dave Plowman (News)

I would say that if I needed one, could have a good second hand item within 1/2hr for 5 bucks. Those in the Moss catalogue at that price are exorbitant. My guess is they are a lot cheaper here, over the counter from the manufacturer in Melbourne or even a MG parts specialist. Moss are a bit over the top.

Reply to
Rob

It's likely the Moss item is re-manufactured?

New damper pulleys for my SD1 cost quite a bit too - but are cheap secondhand.

Later B Series engines certainly had them - but then that engine was a substantial development of the earlier one with larger crank bearings, etc. Dunno if the crank pulleys are interchangeable.

But I also dunno anything about the diesel. Given the original B Series would break cranks quite readily, it could be it has a stronger one.

Reply to
Dave Plowman (News)

My B is a 1962 which was #650 off the production line and that has a balance.

Parts listing for the MGB tells me they had three pulleys, early, then thru to 74, then 18V 75 on. The picture is showing a balance.

I didn't know that there was a diesel either.

Reply to
Rob

The 'B' is of course pretty well the last variant of the B Series. (I know it changed from 3 to 5 main bearings) And being the biggest is more likely to need a vibration damper.

I wonder if there were more pulleys for things like air con? The power steering pump on the 1800 was driven off the dynamo. Dunno if the Marina offered such things. Or if one was ever stuck on the back of an alternator.

I knew it existed, but that's about all. Think it was based on one of the

1600cc versions?
Reply to
Dave Plowman (News)

In the earlier days it was a 1.5 diesel and later on it was based on the

1622 block presumably they ran out of 1500 blocks. Early A60s and Morris Oxfords had diesel engines mainly taxi drivers wanted them. If looking for spares remember these engines were fitted to the vans as well like the J2,J4 and the Sherpa. The Post Office had loads of them. We always used to wind up the snobby MGB types by referring to the MGB as a two seater Sherpa!. Robbie
Reply to
Roberts

There are probably as many working BMC B-series diesels in use as petrol variants. Except they tend to be confined to the narrowboats and other marine applications. They are regarded as a pretty good workhorse where parts are more available than other engines such as Perkins.

Reply to
Fredxx

Only the 1800 version changed to 5 main bearings. The 1500 stayed with just

3!

I thought the 1600 was a different engine again? The sizes of diesel engine I'm aware of in common use are the 1.5 and 1.8.

Reply to
Fredxx

What about the 1600 variants that went into the later MGAs?

Reply to
Roger Chapman

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