BOSCH Diesel inline fuel injector

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joolie
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BOSCH Diesel inline fuel injector

Post by joolie » Mon Aug 20, 2007 9:13 pm

I WANT ONE!

Complete with injectors, pipes and the bracket for the XUD7 engine.

Are there any other compatible ones for the TZD, for example a Peugot 306? or perhaps a Xantia?

Must the injector be calibrated, even if its from another TZD?

Are there any BOSH pumps on TZD?
'91 BX MkII 1769cc Turbo TZD Break

running on RME/SVO

IF it aInt BrOKe dON't trY 'n FIx iT.

jeremy
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Post by jeremy » Tue Aug 21, 2007 7:55 am

Both the Bosch and Roto-Diesel pumps are of similar design in that they have one pumping element which rotates to do the pumping. They were introduced during the 50's as they were considered to give better control of timing and were capable of rotating at higher speeds that the in-line pumps which preceded them.

The in line pump had a separate pumping element for each cylinder and were operated by what looked like a camshaft. They were speed sensitive as I found out with a BMC engine in a Land Rover when the camshaft snapped a couple of times.

In-line pumps were still used on some vehicles till quite recently - I think some larger than Transit Ford vans had them and Mercedes may have used them.

I am not aware of any good reason to use one.

Some TD BX are fitted with Bosch pumps which are rotary type . The seals are reputed to be less soluble in vegetable oil than those originally fitted to the Roto-Diesel - which can be changed to a later type which will handle vegetable oil. Experience from this and other boards would suggest that the failure of seals on a Roto-Diesel takes some time.

I'm sure that XUD's of the same age will use similar pumps with detail differences in their adjustment when delivered which is reflected in the model number. How important these details are I don't know. (They'll probably work OK)

I think you can use injectors of a different make providing they are intended for the same task (ie turbo for turbo, similar pressures - they do vary with age - generally getting higher.)

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joolie
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Post by joolie » Tue Aug 21, 2007 10:19 am

Thanks for the info, that put my head straight on a few things. I discovered the inline rotary diference last light and realized my mistake.

But what I didnt know was WHY the Roto Diesel pumps were failing, it was not specified anywhere.

I thought it was a viscosity issue.

Im going to intall the inline heaters, and keep burning veg oil.

Although usually Im burning a blend of biodiesel/vegoil. Would that make the seals last longer?

Can the seals be repaired/replaced.
'91 BX MkII 1769cc Turbo TZD Break

running on RME/SVO

IF it aInt BrOKe dON't trY 'n FIx iT.

jeremy
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Joined: Fri Jul 01, 2005 2:58 am
Location: Hampshire UK

Post by jeremy » Tue Aug 21, 2007 10:30 am

To be honest I'd get the thing working properly on fossil fuel, use it for a bit to make sure I'd git it working properly and reliable then I'd start messing around with conversions.

Many people in UK simply put some veg oil in and don't do any mods at all as far as I can see.

I think kits for conversion of the Roto-Diesel pump can be bought from specialists. In UK Roto-Diesel seems to have gone back to the Lucas name (which sends a shiver of fear down the spine as they were one of the principle reasons the British motor industry failed. Having said that CAV/Roto-diesel were a bit better.)

Geoffrey Gould
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Pumps .

Post by Geoffrey Gould » Tue Aug 21, 2007 12:22 pm

Hi as far as I can remember its the the 'thickness' of the fuel that causes the trouble with the Lucas pumps, the lift pump vanes cant handle the thickness and the vanes break up, also the seals go. The Bosch pump seem to be able to cope OK with out a problem.
Injectors really should be Bosch with Bosch and Lucas with Lucas. as the pressures are very different and while the engine may run it will not be very well and probably not for long.
Cheers.
Geoff.
1991 BX 1-7 td Auto.


I MAY NOT BE ALWAYS RIGHT BUT I AM
NEVER WRONG.

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MULLEY
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x 3

Post by MULLEY » Tue Aug 21, 2007 8:56 pm

I thought with Bosch pumps you could just use normal cooking oil without any engine mods or heaters, of upto a 20% blend ratio with derv?