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All Other GM Diesels Discuss any other GM Diesel engines... 5.7l Olds, Chevette Diesel, or anything else that doesn't fit anywhere else... |
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#1 (permalink) |
Gear Grinder
Join Date: Nov 2019
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5.7 Olds Injector Pump Question
I bought a just about perfect 1980 Eldorado diesel, I know about them and was aware of their reputation. I have been driving it awhile and it suddenly started acting weird, last week i was driving it home and it was losing power and wouldn't respond when i would depress the throttle. I limped it home but several times it died while idling. I have been researching the injector pumps and read about the plastic ring that degrades and clogs the return line and this causes problems. I haven't had time to look at it, but i read to look for fuel coming out of the return line, also if the pump is bad whats a rebuild like, i am a mechanic so not afraid of working on cars but am afraid of messing up an injector pump. I have poppet injectors, but i am confused about rebuild kit and where to find the replacement metal ring.
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1980 Eldorado diesel 5.7L Last edited by OkDually; 11-09-2019 at 12:46 PM. Reason: prefix/sig |
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#2 (permalink) |
Ronald Reagan fan
![]() Join Date: Sep 2003
Location: Newfoundland/Alberta,Canada
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It’s a easy pump to fix.A local stanadyne shop will have a rebuild kit with o-rings and seals with a new flex ring.I think it’s part number 24370.
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1996 GMC Sierra ext.cab Z71....with new genuine GM 6.2 660 short block,4L80E/6.5TD cylinder heads,DS4 5521S,82' 6.2 rocker arms,acdelco TP1069/Racor 20S fuel filters,4" diamond eye exhaust,3.73 G80 locker,stanadyne 37818 injectors 1996 Chevy K1500 Z71.....with '99 6.5 506 goodwrench van engine,88-93 6.2 diesel Napa y-pipe,'87 700R4,acdelco TP630F/Racor 20S fuel filters,Bosch non-turbo injectors,stanadyne blue tag 5088 1993 Chevy K1500 Z71...with 97' 6.5 TD 506 block,82' 6.2 rocker arms,stanadyne 37818 injectors,stanadyne blue tag 4911,DSG girdle,reman 700R4,Banks boost/pyrometer gauges,acdelco TP1069/TP943 fuel filter system,4” diamond eye exhaust/2 piece crossover 2008 Mercedes Benz E320 3.0 V6 turbo diesel 2013 Volkswagen Passat 2.0 TDI |
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#3 (permalink) |
Diesel Veteran
Join Date: Mar 2012
Location: St. Paul/Minneapolis MN USA
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Its not too hard to get the top off these pumps. IIRC you kinda slide it away from the front of the car as you lift it to clear the shutoff solenoid. A look at what is floating in the fuel there will tell you a lot about the condition. If its clean fuel you should check other places before condemning the pump. If there is crap floating in the fuel there its done and needs a rebuild. If its clean chances are good the gasket will be in good shape too and go back on and seal so you aren't out much more than some time.
What part of the us/world you in? Cloth or leather interior? I still have my 80 Eldo and its got a good pump on it if you are not too far away from MN.
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98 Burb K25 4.10's 250K miles, new to me, pretty clean and stock. 95 Burb K25 3.73's CRASHED 250K miles, looks to have been rebuilt at least once, stock, bad rust, DE exhaust w/walker muffler, 8' western plow. 81 Buick Riviera GAVE AWAY with the infamous Olds 5.7 diesel possibly still going strong. 15 VW Golf wagon, TDI. Did the buyback on my 13 Jetta TDI wagon so it was basically a trade up. 96 Burb K25 3.42's SOLD at 340K miles, told it was all original, close race between engine wearing out or body completely rust out. |
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#4 (permalink) |
Gear Grinder
Join Date: Nov 2019
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I live in Spokane Washington, so if you have a good working pump i would be interested in it as a spare, it would also allow me a little more time to learn on mine as i take it apart. My eldo has leather, stainless top, sunroof and just about every possible option, its a really nice driving car. and i am surprised by the mileage even with it being a diesel.
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1980 Eldorado diesel 5.7L |
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#5 (permalink) |
Diesel Veteran
Join Date: Mar 2012
Location: St. Paul/Minneapolis MN USA
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Sounds like a nice car and you are a little far from me to make a whole parts car deal practical. At the moment I don't really want to just sell parts off it.
80 is an oddball year for the diesels. Partway through the year they switched from the pencil to micro injectors. 81 they added the cold advance so that makes a micro with no advance a half year item. Rebuild kits are not a problem because they were somewhat universal but the exact pump can be tricky. Later pumps should work and you can add the advance wiring since its the same circuit as the fast idle and glow inhibit. Other odd thing about the 80 is the heads. There was only the part year that had the micro injectors and external EGR. 81 had the micro but internal EGR like a gas engine. IF you are looking at intake gaskets the ones you need have the 2 square gaskets for the crossover and the intake ports are also pretty square. The later and more common internal EGR gasket set has more rectangle crossover gaskets with the small egr port in the middle of them and the intake ports are also more narrow and rectangle. If you get the wrong ones you end up with leaks into the crankcase which isn't good for a diesel.
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98 Burb K25 4.10's 250K miles, new to me, pretty clean and stock. 95 Burb K25 3.73's CRASHED 250K miles, looks to have been rebuilt at least once, stock, bad rust, DE exhaust w/walker muffler, 8' western plow. 81 Buick Riviera GAVE AWAY with the infamous Olds 5.7 diesel possibly still going strong. 15 VW Golf wagon, TDI. Did the buyback on my 13 Jetta TDI wagon so it was basically a trade up. 96 Burb K25 3.42's SOLD at 340K miles, told it was all original, close race between engine wearing out or body completely rust out. |
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