HP pump question

toddao · Post by **toddao** » Wed May 16, 2007 9:23 am

Is there a difference between the HP pump used on petrol and diesel models? I'm looking at a pump described as ' suitable for all BX petrol models'. It looks the same but would it fit my 1.9D? Thanks

ken newbold · Post by **ken newbold** » Wed May 16, 2007 11:17 am

I could get you one if you need one. There is one I know to be good in a local scrap yard, but he's likely to want £20-25 for it.

roscoe · Post by **roscoe** » Wed May 16, 2007 2:00 pm

The 16V pump sits in the same position as the diesel one but has a different pulley diameter on it - think it is 90mm vs 100 or 110mm for the diesel. I read somewhere recently that there were three pulley sizes on the pumps - diesels were largest, 16V smallest, with the rest of the petrol ones in between. Haven't seen anyone successfully remove the pressed on pulley from the pump, so unless it's the right diameter you won't be able to use it.

Post by **docchevron** » Wed May 16, 2007 2:04 pm

The 16v pump is very different to the diesel pump, so even if you changed the pulley, you'd have to use the valver adjuster/idler wheel, and the mounting cage, and re-pipe the car to fit the pump, more trouble than it's worth really...

toddao · Post by **toddao** » Wed May 16, 2007 3:40 pm

Thankyou for the replies everyone. I'd only seen a bad picture of the other pump, so superficially it looked the same. Never seen the set-up in a petrol BX. It's a new item so I thought I'd get it in and replace my old one. Apparently new ones are dear. Passed up on a new diesel one last month for €40.
Thanks for offer Ken, I'll let you know after weekend when the new accumulator sphere is in.