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  View original topic: 71 fastback and 73 square back both fi. same pump??????
chrizzzzz Wed Aug 13, 2008 12:06 pm

Could anyone answer this one?

architect_7 Wed Aug 13, 2008 1:04 pm

chrizzzzz wrote: Could anyone answer this one?

Yes. There are differences between the '68/'69 and the '70-'73, but they will all interchange.

Russ Wolfe Wed Aug 13, 2008 2:54 pm

The 68/69 pump is not worth putting in. They were a bad design, and that is why Bosch redesigned the pump.

architect_7 Wed Aug 13, 2008 4:28 pm

Russ Wolfe wrote: The 68/69 pump is not worth putting in. They were a bad design, and that is why Bosch redesigned the pump.

Would it work in a pinch?

Design wise, what is wrong?

Thank in advance! :D

KTPhil Wed Aug 13, 2008 7:48 pm

Not sure what is wrong, but I can guess. The later pump's motor is bathed in the gas so it runs cooler, probably extending it's life.

JSMskater Thu Aug 14, 2008 12:30 am

KTPhil wrote: Not sure what is wrong, but I can guess. The later pump's motor is bathed in the gas so it runs cooler, probably extending it's life.

other than that, the only difference i can think of is that one of the outlet nipples faces a different direction than the other two. Russ? care to elaborate?

KTPhil Thu Aug 14, 2008 8:38 am

New style may have been cheaper to manufacturer, too--fewer parts, less assembly required.

Russ Wolfe Thu Aug 14, 2008 4:02 pm

JSMskater wrote: KTPhil wrote: Not sure what is wrong, but I can guess. The later pump's motor is bathed in the gas so it runs cooler, probably extending it's life.

other than that, the only difference i can think of is that one of the outlet nipples faces a different direction than the other two. Russ? care to elaborate?

They were not cooled by the gas, and they were very problematic.
I have several of them in my junk box, that I took off because I could not trust them. They would quit when they got hot.



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