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740t main fuel pump numbers

S

stim

New member
Joined
Nov 19, 2018
Location
w mass
Need the entire bosch number for 1990 740t wagon- now have 2 on bench 1 in car and lost which is original. With incessant cavitating I want to go back to zero with a new pump filter check valve combo and hopefully not crawl under car again.
Just for kicks, without raising any dust is there a collective opinion on 'as good as bosch' pumps?
Have an ice day
 
Indeed Carter does

Not too pricey i suppose- what baffles me is Bosch numbers. Have found at least several number sets on 740's and wish i could know the designation [year? day/night shift?]
580 464 339..... 580 464 025
 
Redwood Chair said:
Right?

Whatever you do don't give IPD $100 for the right thing.
Click to expand...

$100 to iPd + $12 shipping probably, then another week-2weeks to get it to MO....Rock auto FTW. Don’t forget your 5% off coupon that is ALWAYS available to anyone.

Edit: $82.84 shipped to your front door from rock auto:cool:
 
and from memory to this gnashing of teeth, aren't the last digits of the turbo pump 044?

OP, you can check TASCAparts.com and confirm it. When in doubt, find NOS German made BOSCH.....and mission accomplished.
 
DET17 said:
and from memory to this gnashing of teeth, aren't the last digits of the turbo pump 044?

OP, you can check TASCAparts.com and confirm it. When in doubt, find NOS German made BOSCH.....and mission accomplished.
Click to expand...

That may be the case, but if dimensions are the same, I wouldn?t worry. The NA pump flows plenty enough for most people?s applications.
 
Never heard of ipd suppliers. They don't come up in search lists that i've noticed. No matter-
Thanks for info ALL
 
Filter sock shows no evidence of clogging- does a new one appear the same as a clogged one?
Never seen a new one. Installing a new filter on this account first, much as I love pulling in tank fuel pumps.
 
stim said:
Filter sock shows no evidence of clogging- does a new one appear the same as a clogged one?
Never seen a new one. Installing a new filter on this account first, much as I love pulling in tank fuel pumps.
Click to expand...

The in tank pump is easy to replace too. Are you positive that yours works well? As per cleanflamretraps site, I installed an airtex E8778 over a couple of years ago and all is well. My OE Bosch pump was actually fine, it ended up being corrosion on the sending unit not passing enough current to power up the pump. I replaced it all.
 
stim said:
Never heard of ipd suppliers. They don't come up in search lists that i've noticed. No matter-
Thanks for info ALL
Click to expand...

100281 - Bosch - Main Fuel Pump - 9142045

fullsize_19092.jpg
 
So far> replaced main pump once with a used one and same result. Replaced entire in tank assembly twice [used] with same result. No evident corrosion or rotten rubber on anything, runs smooth to the ear. Main pump gets noisier as tank level lowers, with hesitation after stopping. Since the pump will not operate without full voltage i'm assuming it's ok and some clog factor is at hand.
Read somewhere if the fuel pressure valve isn't allowing return to tank this could cause surging [?]
 
stim said:
So far> replaced main pump once with a used one and same result. Replaced entire in tank assembly twice [used] with same result. No evident corrosion or rotten rubber on anything, runs smooth to the ear. Main pump gets noisier as tank level lowers, with hesitation after stopping. Since the pump will not operate without full voltage i'm assuming it's ok and some clog factor is at hand.
Read somewhere if the fuel pressure valve isn't allowing return to tank this could cause surging [?]
Click to expand...

Did you check/replace the rubber fuel line inside the tank? That causes issue below x amount of fuel. Also, voltage=/=current. Pumps can be receiving 12v but insufficient current. Voltage drop is what causes my car to stutter and die at high altitudes.
 
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