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  #1  
Old 01-09-2020, 02:09 PM
Turbo190D's Avatar
1987 190D Turbo
 
Join Date: May 2017
Location: AL, USA
Posts: 148
83 300SD - no start

I'm trying to get the motor to fire on my parts car. The motor is the main thing I want on it, I plan to swap it into my truck later. Anyway the car has sat for nearly a decade. "Ran when parked" of course. I disconnected the fuel lines from the tank and have the fuel circulating from a bottle connected right at the pump. Diesel leaks out when I prime the fuel pump, which may be a problem, who knows. As I turn the engine over, diesel does seem to go through the system (or at least it comes out of the return line above the primary fuel filter). There's no air filter in it so I'm pretty sure that it's getting air to the cylinders. Typically with cars I do the "fuel, air, spark" check but I honestly don't know what the equivalent of spark is for diesels. My 190 sat for a long time before I bought it but it fired up as soon as I tried to crank it. Since this one won't fire I'm at a bit of a loss. Any troubleshooting tips?

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2010 Mercedes E350 4Matic - 77k miles
1986.5 Nissan D21 V6 4x4 - 276k miles
1987 Mercedes 190D 2.5 Turbo - 3??k miles
1983 Mercedes 300SD turbo parts car
2017 Honda CBR500R - 15k miles
2016 Suzuki GSX S1000 - 9k miles



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  #2  
Old 01-09-2020, 05:47 PM
dkr dkr is offline
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Posts: 644
Quote:
Diesel leaks out when I prime the fuel pump
Replace the primer pump from the mushroom to the black one. IIRC, it's a quick fix -- just two bolts and they are easy to get to. You will have lots of trouble getting it started if you can't prime it, and the primer pump is introducing air into the system.

Dkr.
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  #3  
Old 01-09-2020, 06:52 PM
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can you blow some propane or WD-40 into the intake? Seems to me Iíve heard thatís a safe way to get one to run, but Iíve been wrong before..
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  #4  
Old 01-09-2020, 10:16 PM
Turbo190D's Avatar
1987 190D Turbo
 
Join Date: May 2017
Location: AL, USA
Posts: 148
Thanks guys. I found the primer pump piece, says its an actual Bosch one, got it on ebay for $16. Hopefully that'll sort the issue. I want to hear this thing run before I pull the engine out of it.
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2010 Mercedes E350 4Matic - 77k miles
1986.5 Nissan D21 V6 4x4 - 276k miles
1987 Mercedes 190D 2.5 Turbo - 3??k miles
1983 Mercedes 300SD turbo parts car
2017 Honda CBR500R - 15k miles
2016 Suzuki GSX S1000 - 9k miles



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  #5  
Old 01-10-2020, 12:56 AM
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Location: Long Beach,CA
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When you loosen the Fuel Injection Hard Lines at the Injectors is there Fuel coming out of the.

Is the Glow Plug system working?
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  #6  
Old 01-10-2020, 07:01 AM
t walgamuth's Avatar
dieselarchitect
 
Join Date: Apr 2005
Location: Lafayette Indiana
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Quote:
Originally Posted by doofus View Post
can you blow some propane or WD-40 into the intake? Seems to me Iíve heard thatís a safe way to get one to run, but Iíve been wrong before..
Propane seems a very bad idea. I have never heard of it advocated.

Wd 40 though is pretty much just like diesel and can be used to start an engine with an air bubble in its injection system. You can spray it directly into the intake after removing the air cleaner with no danger. Just keep spraying until the engine will run on its own.
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[SIGPIC] Diesel loving autocrossing grandpa Architect. 08 Dodge 3/4 ton with Cummins & six speed; I have had about 35 benzes. I have a 39 Studebaker Coupe Express pickup in which I have had installed a 617 turbo and a five speed manual.[SIGPIC]

..I also have a 427 Cobra replica with an aluminum chassis.
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  #7  
Old 01-10-2020, 07:17 AM
oldsinner111's Avatar
once a happy man
 
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propane works good
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  #8  
Old 01-10-2020, 08:06 AM
Shadetree
 
Join Date: Jan 2010
Location: Back in SC upstate
Posts: 1,634
I'd adjust the valves and make sure the glow plugs are working before I turned the key. This time of year a fight with a diesel which needs valve adjusted or glowing glow plugs is fruitless and puts way too much work on a starter, imo.

Installing the primer pump was a good start.
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  #9  
Old 01-10-2020, 10:08 AM
ollo's Avatar
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Diesel equivalent of gas engine spark is the glow plug and compression. Problems with either one can cause a no start.
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  #10  
Old 01-10-2020, 02:21 PM
Turbo190D's Avatar
1987 190D Turbo
 
Join Date: May 2017
Location: AL, USA
Posts: 148
All good information to know. I've got some WD-40 laying around. I'll try some of that if I can't get it to turn over. It's been in the 60s (F) the last few days here in AL so I figure it's not too cold even if the plugs aren't warming to maximum. I'll read up on adjusting the valves and how to check the plugs though just in case.
__________________
2010 Mercedes E350 4Matic - 77k miles
1986.5 Nissan D21 V6 4x4 - 276k miles
1987 Mercedes 190D 2.5 Turbo - 3??k miles
1983 Mercedes 300SD turbo parts car
2017 Honda CBR500R - 15k miles
2016 Suzuki GSX S1000 - 9k miles



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  #11  
Old 01-10-2020, 05:35 PM
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apparently the propellant in WD-40 used to be propane, but is now carbon dioxide.
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  #12  
Old 01-11-2020, 12:18 AM
t walgamuth's Avatar
dieselarchitect
 
Join Date: Apr 2005
Location: Lafayette Indiana
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Quote:
Originally Posted by oldsinner111 View Post
propane works good
on a diesel?
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[SIGPIC] Diesel loving autocrossing grandpa Architect. 08 Dodge 3/4 ton with Cummins & six speed; I have had about 35 benzes. I have a 39 Studebaker Coupe Express pickup in which I have had installed a 617 turbo and a five speed manual.[SIGPIC]

..I also have a 427 Cobra replica with an aluminum chassis.
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  #13  
Old 01-11-2020, 12:20 AM
t walgamuth's Avatar
dieselarchitect
 
Join Date: Apr 2005
Location: Lafayette Indiana
Posts: 37,219
Quote:
Originally Posted by doofus View Post
apparently the propellant in WD-40 used to be propane, but is now carbon dioxide.
so does a diesel still run on it?

__________________
[SIGPIC] Diesel loving autocrossing grandpa Architect. 08 Dodge 3/4 ton with Cummins & six speed; I have had about 35 benzes. I have a 39 Studebaker Coupe Express pickup in which I have had installed a 617 turbo and a five speed manual.[SIGPIC]

..I also have a 427 Cobra replica with an aluminum chassis.
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