Bosch Fuel Pump Part # for 1981 308 GTSi? Dual fuel filter setup

Hi Shane,

I have a spare pump out of an 81 308 around here someplace. I'll try to dig it out and take a pic.

Jim

 

I have an '81 and can get you the Bosch part number tonight.


Can get a brand new OEM fuel pump too directly from Bosch if you are interested.

 

Shane -- You don't need to start a new thread with every post. It would be far better IMO to have all of your recent prior posts in a single thread because they all relate to you finding, and fixing, a fuel delivery problem on a 2-valve i. <rant off >

It's not the filter set-up that makes the difference in the fuel pumps. When Bosch first introduced the CIS system they built the (non-replaceable) check valve into the fuel pump (probably in an effort to minimize the number of parts) -- call this the "internal check valve fuel pump". Later on, they figured out that the failure rate of the check valve far exceeded the failure rate of the electric motor and pump head so they changed the check valve to a separately replaceable item that screws into the pump -- call this the "external check valve fuel pump". The "problem" is that the internal check valve fuel pump is no longer made, so it must be replaced by the external check valve type fuel pump (unless you find a 30-year old NOS pump) -- this requires some slightly different fittings/hose to connect from the external check valve to the accumulator so you'll probably get to meet/contact/talk with Larry Fletcher (fletch62).

This is not a problem for only your model. Any CIS injected F from the 1980~1983 timeframe has this same issue so we've come across it many times. Here's a good thread from Newman updating his BBi512 for the same issue that has pictures of both types of fuel pumps and the plumbing changes needed:

http://www.ferrarichat.com/forum/showthread.php?t=189796

 

Can't speak to the quality of these but very cheap...

http://www.rockauto.com/catalog/x,carcode,1298561,parttype,6200

 

I'm a little fussy re brands I install on my car. I probably wouldn't chance the really cheap filters. Might as well go with Bosch. But if you need one tonight, I'm sure you can pick up a Fram G3744, Purolator F64857 or similar at Advance Auto or O'Reilly.

 

I believe those Mahle are a quasi-equivalent substitution, but that the early Bosch filter (F PN 115738) is 0450905203 (or Bosch USA 71051):

http://www.rockauto.com/dbphp/x,catalog,23,partnum,71051,d,BOSCH_71051.html

Here's a photo previously posted by someone showing the (slightly smaller) Bosch compared to (maybe another?) Mahle:

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There are a bunch of near equivalents with slightly different OD and/or length (Bosch 71047, Napa 3153, Baldwin BF1177) but as long as it fits in the loop clamp and has the right inlet and outlet threads they all sort of work.