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 Post subject: 900 fuel pump
PostPosted: Mon Mar 30, 2020 3:21 pm 
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Joined: Tue Aug 04, 2015 12:18 am
Posts: 82
Location: Scotland
Car Model: 900
Can anyone confirm if this is correct fuel pump for a '79 900GLE?

Drowning under the different alleged part numbers and "universal" compatibility.
Cheers guys.

Pierburg 7.21659.70.0 Fuel Pump

https://www.onlinecarparts.co.uk/pierburg-965153.html


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 Post subject: Re: 900 fuel pump
PostPosted: Tue Mar 31, 2020 7:29 pm 
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Joined: Sun Apr 16, 2017 7:16 pm
Posts: 190
Location: Leeds
Car Model: 900 Turbo 1980 gotta be green
Hi, I've got a 1980 900 Turbo and expect that your GLS is fuel injected with an in tank fuel pump just like mine.
My car was a barn find that stood for 30 years and the pump was wrecked.

Image

I started a search for a replacement pump and found it quite tricky firstly as your car (like mine) will have spade connector terminals whereas the later cars had a round post electrical connector as shown in your photo.

I've just dug my spare pump out and taken a photo.

Image

At the time I needed a pump quick and did manage to buy a brand new one off ebay. It was slightly slimmer than the original and this meant I has to use an bicycle inner tube to wrap wound the pump so it clamp up nicely into the big black rubber seal that fits into the tank. It worked fine with no issues.

Just had a look at my ebay purchase list from 2018 and it says that I bought this one - which must have changed spec as it doesn't have spade connectors any more. I didn't have to do the spade to ring connector modification for certain. Its £29.15.

I would just cut the spade connectors of the car loom and replace with the ring connectors. It depends how original you want the car to look.
https://www.ebay.co.uk/itm/FUEL-Electri ... Swlq9eIpPm

Is the one you are looking at for 'in-tank' applications. I've not seen one before with the black rubber type finish. Looks the part but the price is top end.

Just remember to get the tape measure out and follow the guide in the Haynes manual for fitting it into the top rubber seal so the whole assembly drops in perfectly.

Cheers Jonathan


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 Post subject: Re: 900 fuel pump
PostPosted: Tue Mar 31, 2020 9:14 pm 
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Joined: Tue Aug 04, 2015 12:18 am
Posts: 82
Location: Scotland
Car Model: 900
Cheers

Not pulled pump yet, there's half a tank of varnish in there.

Yes it looks like yours with the spades.

When i searched the suggested saab part numbers for the year, bay of evils was throwing out all kinds of Bosch numbers that were allegedly compatible. Proper minefield of confusion!

I was happy with Pierburg pumps when had old Mercs, hence posting the one above. It is still suggested as compatible, the black appears to be a cover for aiding
fitting to 60mm dia, that can be removed. Pump dia is 43mm

Will dig out the old Haynes manual, Bentley starting at '81 means not 100% helpful


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 Post subject: Re: 900 fuel pump
PostPosted: Tue Mar 31, 2020 10:53 pm 
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Joined: Sun Apr 16, 2017 7:16 pm
Posts: 190
Location: Leeds
Car Model: 900 Turbo 1980 gotta be green
Half a tank of varnish. Haha remember that well. It stinks like half sherry and half petrol and is still stuck to my garage floor.

Take tank out and if it’s plastic like I expect then use caustic soda crystals and hot water. Looked like new after 10 mins. Don’t get it near metal though.


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 Post subject: Re: 900 fuel pump
PostPosted: Wed Apr 01, 2020 7:16 am 
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Joined: Wed May 12, 2004 9:53 pm
Posts: 17445
Location: Devon
JonBentley wrote:
I would just cut the spade connectors of the car loom and replace with the ring connectors.

If you're sticking to Ebay then the tabs are available here:
https://www.ebay.co.uk/itm/6-3mm-Straig ... 1639497998

Angled ones are available from RS Components, although I haven't looked to see what pack sizes are available. Flat ones can become angled ones quite easily :wink:

No wiring mods required, then.

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 Post subject: Re: 900 fuel pump
PostPosted: Wed Apr 01, 2020 12:24 pm 
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Joined: Tue Aug 04, 2015 12:18 am
Posts: 82
Location: Scotland
Car Model: 900
I've ordered one of these for 25 quid, cheapest that allegedly fits.

https://www.ebay.co.uk/itm/SAAB-900-2-0 ... SwY0teJDCV

Decided a cheapy will allow me to check things out just now, better quality one can be sourced when closer to going on the road(a long way off)

Thinking i may have old coils kicking around that might donate spade tabs if needed :wink:

Pump i originally posted concerned me as suggested operating pressure of 6.5 bar, my memory of K-Jet was always 5bar pump used


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 Post subject: Re: 900 fuel pump
PostPosted: Wed Apr 01, 2020 6:19 pm 
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Joined: Sun Apr 16, 2017 7:16 pm
Posts: 190
Location: Leeds
Car Model: 900 Turbo 1980 gotta be green
Didn't even know there were such things as screwed post to spade connector converters. Logged that one in my head for another day.

I'm getting curious. It wouldn't be the 5 door GLS that was on gumtree recently would it :geek:


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 Post subject: Re: 900 fuel pump
PostPosted: Wed Apr 01, 2020 6:37 pm 
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Joined: Tue Aug 04, 2015 12:18 am
Posts: 82
Location: Scotland
Car Model: 900
Um........ Erm.......... :bag:


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 Post subject: Re: 900 fuel pump
PostPosted: Wed Apr 01, 2020 6:56 pm 
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Joined: Sun Apr 16, 2017 7:16 pm
Posts: 190
Location: Leeds
Car Model: 900 Turbo 1980 gotta be green
Well I'm really pleased whatever it is as its great that someone else has one of the very early 900s (part 99 and part 900). Can't wait for the photos to start coming in.
Every part is a dilemma as to whether I should be look at a 99 or 900. Bill at Saab bits has been great at directing me on what is appropriate.


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 Post subject: Re: 900 fuel pump
PostPosted: Wed Apr 01, 2020 7:36 pm 
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Joined: Tue Aug 04, 2015 12:18 am
Posts: 82
Location: Scotland
Car Model: 900
Espin99 gave me a scratch that i didn't even know i had an itch for!

I actually like her in her multiple shades of red, it's character :lol:

Plan is to get her running and check the box, take it from there.


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 Post subject: Re: 900 fuel pump
PostPosted: Thu Apr 02, 2020 7:18 am 
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Joined: Wed May 12, 2004 9:53 pm
Posts: 17445
Location: Devon
Mr Haynes wrote:
Pump i originally posted concerned me as suggested operating pressure of 6.5 bar, my memory of K-Jet was always 5bar pump used

I'm not that familiar with the K-Jet system but isn't there a pressure regulator of some sort somewhere in the system? That would mean the pressure can never be too high and the pressure rating of the pump would only denote its maximum capability rather than the system pressure. If that is the case then surely you only need to find a pump rated at *at least* 5 bar.
Or maybe I'm wrong but I thought the only injection system Saab used where the pump regulated the system pressure was D-Jet. I know the D-Jet pump had an extra port for fuel return to the tank but I'm no expert on D-Jet either and perhaps that was just an emergency relief if the pressure got too high (e.g. due to a blocked hose).

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 Post subject: Re: 900 fuel pump
PostPosted: Thu Apr 02, 2020 9:33 am 
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Joined: Sun May 21, 2006 11:18 pm
Posts: 4289
Location: REMAINING UNFAITHFUL TO FACTORY STANDARD SPECIFICATIONS SINCE 1988
Car Model: OLD SAABS,VOLVOS&VW...
K-JET RUNS AT A LINE PRESSURE OF 6 TO 6.5 BAR (AROUND 90-100 PSI) STRAIGHT FROM THE PUMP. 99/900 TURBO.

K-JETRONIC RELIES ON A CLEAN SUPPLY OF FUEL,WHICH IN ITSELF KEEPS THE STAINLESS STEEL PISTON CLEAN,IN THE FUEL DISTRIBUTION UNIT.

THE FIRST RULE OF THUMB,WHEN TRYING TO GET AN OLD SYSTEM WORKING,THAT HAS BEEN LAID UP LONGER THAN 2-3 YEARS,IS -DO NOT TRY- AND START IT!!

ANY FUEL THAT WAS IN THE PLASTIC LINES 99/900 WILL ALSO BE CONTAMINATED,THE FUEL DISTRIBUTION UNIT,WILL LIKELY HAVE THE PISTON JAMMED WITH VARNISH.IT IS A FINITELY ENGINEERED ASSEMBLY.

THE FUEL ACCUMULATOR,(MOUNTED NEXT TO TANK)DIAPHRAGM WILL LIKELY HAVE RUPTURED ALSO.

THE 'WARM UP REGULATOR' WILL ALSO LIKELY BE CORRRODED INTERNALLY,THE BI-METALLIC STRIP UNABLE TO ALTER THE FUEL PRESSURES,FOR THE STARTING/WARM UP CYCLE.....

ALL FUEL LINES,SHOULD BE REPLACED 'BILL J' DID HAVE SOME IN STOCK.
THE FUEL DISTRIBUTION UNIT, NEEDS TO BE STRIPPED DOWN,CLEANED AND REBUILT BY A PROFFESSIONAL OUTFIT.
LIKELY NEW INJECTORS WILL BE REQUIRED.


FROM EXPERIENCE,INJECTORS THAT HAVE NOT BEEN USED FOR A LONG TIME,TEND TO STICK IN THE 'CLOSED' POSITION.
THIS MEANS THAT EVEN WHEN THE FUEL PUMP IS ENERGISED,AND PRESSURE IS THERE,THE INJECTORS MAY NEED TO BE LEFT FOR A DAY OR TWO,UNTIL THEY 'FREE' OFF INTERNALLY......

AND OF COURSE RENEW FUEL FILTER.

IN SHORT RENEW EVERYTHING,OR YOU ARE THROWING GOOD MONEY AFTER BAD, THE CAR WILL NEVER RUN RIGHT....

I HAVE EXPERIENCE,OF NON-GENUINE BOSCH IN-TANK FUEL PUMPS.THE ISSUE WITH THE PIERBURG ONE PICTURED,IS THE FUEL EXPOSURE,TO THE SLEEVE THAT IT COMES WITH,AS IN A SAAB,THE PUMP ALWAYS SITS IN THE TANK,SUBMERGED.

THE SLEEVE WILL DISINTEGRATE,OVER TIME.......

THERE IS A REASON SAAB CHOSE 'BOSCH' COMPONENTS.

MOTOR FACTORS SHOULD STILL BE ABLE,TO LOCATE THE CORRECT 'BOSCH' PUMP,IT IS USED ON MANY OTHER VEHICLES

OTHER MANUFACTURERS,HAD THE PUMP MOUNTED REMOTELY,NEAR THE FUEL TANK.

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 Post subject: Re: 900 fuel pump
PostPosted: Thu Apr 02, 2020 11:45 am 
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Joined: Tue Aug 04, 2015 12:18 am
Posts: 82
Location: Scotland
Car Model: 900
Thanks for your replies.

I should really have a look for my K-Jet manual, refresh my memory as been a good while since playing with it in anger.

At the moment really only want to check engine and box aren't dead, no rush to get on road. If i can get away without rebuilding them it would be a bonus.

Decided to order the cheapy pump purely for testing, correct bosch can be sourced at a later date.

Have seen BillJ's fuel lines, they were already on my list for other car :wink:

So far only stuck an old battery in to see what was alive, pump obviously not being silent. Turned over for couple of seconds so engine not seized. Electrics seem to be pretty much intact. Quick look underneath suggests not too bad.

Interior is nice, takes you back to the 70's :lol:


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 Post subject: Re: 900 fuel pump
PostPosted: Thu Apr 02, 2020 2:32 pm 
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Joined: Sat Jan 20, 2007 6:33 pm
Posts: 48581
Location: NETTLEHAM, LINCOLNSHIRE
Car Model: 99GL C900 Jag XF & FIAT500
Mr Haynes wrote:
Espin99 gave me a scratch that i didn't even know i had an itch for!

I actually like her in her multiple shades of red, it's character :lol:

Plan is to get her running and check the box, take it from there.


Nice to see someone was willing to take it on :D

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 Post subject: Re: 900 fuel pump
PostPosted: Thu Apr 02, 2020 5:12 pm 
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Joined: Sun Apr 16, 2017 7:16 pm
Posts: 190
Location: Leeds
Car Model: 900 Turbo 1980 gotta be green
Hi. I suppose like me at the time when I was resurrecting my 900T after a 30 year layup, you just wanted to see it start, run and drive. I think you need to know its worth continuing.
I changed the rotor arm, plug leads, air filter, oil filter and oil first.

I cleaned the tank out really thoroughly, put in a new fuel pump 'borrowed' from my then spares car.
I ran the system with the fuel line disconnected to see what came out of the line. Not much in my case so I reconnected it. This was the inlet to the manifold, not the inlet to the fuel filter.
I turned the key. It wanted to run but just wouldn't.

My big mistake was not to change the fuel filter. It started straight away after that.
So my advice is change the fuel filter, and get some of the special washers off bill for the fitting on the pump, and the fuel filter banjo connections. The old ones will disintegrate and it will leak like a sieve for want of a couple of quid of washers.

So having got it running (badly) then you have to decide what next. Martin at JamSaab explained to me a few years ago before I started on what became the spares car that you need deep pockets to put an Saab back on the road. He wasn't wrong. My wife weeps when she sees me looking for bits.

My fuel accumulator had failed. It leaked but didn't stop the car running but was replaced before the MOT.
The warm up regulator was an expensive £200 rebuild as the car just wouldn't run well enough to drive on the road. Still passed the MOT with a dead one though!

I've, (maybe very fortunately) never changed the injectors or the pipes off the k-Jet to the injectors.
I have never touched the K-Jet distributor and view it as the work of the devil.

Enjoy.


Last edited by JonBentley on Thu Apr 02, 2020 5:31 pm, edited 1 time in total.

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 Post subject: Re: 900 fuel pump
PostPosted: Thu Apr 02, 2020 5:26 pm 
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Joined: Tue Aug 04, 2015 12:18 am
Posts: 82
Location: Scotland
Car Model: 900
Later engine a straight swap? :idea:


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 Post subject: Re: 900 fuel pump
PostPosted: Thu Apr 02, 2020 6:24 pm 
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Joined: Sun Apr 16, 2017 7:16 pm
Posts: 190
Location: Leeds
Car Model: 900 Turbo 1980 gotta be green
The water pump was a major issue for me on the b series engine and was the centre of my woes.

Straight after starting the engine my lovely clean oil looked like chocolate milk so I knew either the CHG or water pump had failed letting coolant into the oil. I'm pretty certain now that it was the water pump which is driven off a jack shaft in the engine. Martin at JamSaab helped me out as he had 1 or 2 old stock his shelf but I think people are starting to go down an electric pump route (there's one in the 'Classic Workshop' who has just succeeded this week. Maybe worth considering if an original is completely unobtainable.

The later H engine has a better completely different water pump but is still a K-Jet. I wouldn't be scared of it from my own experience as its been fine for me, but that said I would be straight down the specialist if it went wrong as I don't have the skills to take it on.


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 Post subject: Re: 900 fuel pump
PostPosted: Fri Apr 03, 2020 1:35 pm 
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Joined: Tue Aug 04, 2015 12:18 am
Posts: 82
Location: Scotland
Car Model: 900
Have come across the Bosch Classic website, may be of use to some

http://www.bosch-classic.com/en/interne ... tpage.html


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 Post subject: Re: 900 fuel pump
PostPosted: Fri Apr 24, 2020 4:46 pm 
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Joined: Tue Aug 04, 2015 12:18 am
Posts: 82
Location: Scotland
Car Model: 900
Pump metal retainer ring is well stuck.
Suggestions anyone?


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 Post subject: Re: 900 fuel pump
PostPosted: Fri Apr 24, 2020 8:21 pm 
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Joined: Sun Apr 16, 2017 7:16 pm
Posts: 190
Location: Leeds
Car Model: 900 Turbo 1980 gotta be green
There's a complete in-tank fuel pump with rubbers - the lot on ebay for £49.00. Might save you some messing about and cost, if you don't have to purchase all the individual parts.

https://www.ebay.co.uk/itm/Saab-900-cla ... 000%7C7000


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