Raising the dead - 300sdl killed by gasoline - Page 3 - PeachParts Mercedes-Benz Forum

layback40 · #31 09-08-2012, 02:59 AM

Quote:

Originally Posted by PackerEdgerton

I have always understood that WD40 used as starting fluid with a diesel is a huge no-no?

Sincerely,

PE

Would be interested to know where you got your information from.

Quote:
t walgamuth

it is a substitute for ordinary fuel and can be used to start when the fuel pump has lost prime. It will not help start in cold weather. Actual Ether starting fluid can be fatal to a high compression diesel.
it is a substitute for ordinary fuel and can be used to start when the fuel pump has lost prime. It will not help start in cold weather. Actual Ether starting fluid can be fatal to a high compression diesel.

X2 with Tom.
Though I have used it in cold weather. Have run a diesel on WD40 for more than 30 sec before concluding a fuel supply problem.
On a 60x motor its good to save your starter. It will remain running as long as you keep spraying.

PackerEdgerton · #32 09-08-2012, 11:30 AM

I'm not challenging the idea of using WD40. It is simply that in forum postings (mostly diesel forums, both here and at dieselplace, thetruckstop.us, etc., some people have said that it is bad to use any kind of starting fluid, including WD40.

The reasoning I have heard is that diesels run on compression ignition, and therefore have much higher compression, and that EVEN WD40 can cause preignition, which would be damaging to the engine.

Sincerely,

PE

bigblockchev · #33 09-08-2012, 12:48 PM

Starting fluid is ether. WD40 is basicly kerosene. Using ether in an IDI engine that has Glow plugs can explode before the engine is on the compression stroke. This can cause damage to the injector precups and nozzles among other things.
On the other matter I would be interested to know if the engine has been hydraulic locked by fuel. If the starter stops cranking suddenly I would want to pull the Injectors to relieve pressure. This would also give an opportunity to check the injector nozzles. The 603 starter is indeed a geared starter which is about 1.2KW compared to the 5 cyl which is about .8 or .9KW if memory serves. It is more powerful but not quite as robust.
Cheers Dan

Shifted · #34 09-08-2012, 10:16 PM

Granted I am a new user on the forums, so no real reason to listen, however I have successfully used a rag soaked in gasoline pressed against the intake many times to get the engine started and fuel system primed in several diesel engines, including my 300D.

southofantarctica · #35 09-12-2012, 09:08 PM

Good news! The start is back in and it cranking like a champ now!

The bad is nothing else has changed...
Starting to doubt the working of my lift pump. Can't seem to be able to get any of the new diesel to go anywhere. Does it (the lift pump) need to be primed? Some way to test it? I've been searching, but haven't found anything. Still looking though.

Is there any more specific way to use the WD40? Approximately how much should be shot in?

Any thoughts would be much appreciated!

TnBob · #36 09-12-2012, 09:49 PM

The manual pump is still active using your jug of diesel.

Pump it up until the resistance is very obvious.

Start cranking the motor with all the injectors just barely cracked. You should be
getting a fuel drip/leak at each one assuming your IP is functioning.

Id forget anything until you confirm your fuel delivery is working.

southofantarctica · #37 09-12-2012, 10:01 PM

There is no manual hand pump on mine. It's attached to the IP and is with an inlet and an outlet hose, nothing else.

The injectors are cracked, no fuel leaking out though.

mplafleur · #38 09-12-2012, 10:25 PM

That's correct, there is no hand pump.

It takes a LOT of cranking to fill up the injection pump and pre-heater and filters

t walgamuth · #39 09-12-2012, 10:25 PM

Take off the air cleaner and spray wd40 directly into the intake manifold after running your glow plugs. Continue spraying until it will run without spraying it in.

southofantarctica · #40 09-12-2012, 11:32 PM

I disconnected the lift pump line before the screw on filter and I am not even getting a drip out of it. Absolutely nothing. Logic seems to say if it was working properly, I should be at least getting something out of it, right? Does my juice jug of diesel need to be pressured or am I totally missing something?

PackerEdgerton · #41 09-12-2012, 11:55 PM

No your container of diesel does not need to be pressurized.

Perhaps you should be taking a few pictures of what you're seeing. Perhaps you have something hooked up improperly. I regularly run diesel purge using a bottle and a couple of fuel lines. Do you not see any fuel flow through the see-through primary fuel filter?

When you use the WD40 trick into the intake, are you getting any firing at all?

You need to give us some video or more details in order for us to help you.

PE

layback40 · #42 09-13-2012, 02:42 AM

Quote:

Originally Posted by southofantarctica

Good news! The start is back in and it cranking like a champ now!

The bad is nothing else has changed...
Starting to doubt the working of my lift pump. Can't seem to be able to get any of the new diesel to go anywhere. Does it (the lift pump) need to be primed? Some way to test it? I've been searching, but haven't found anything. Still looking though.

Is there any more specific way to use the WD40? Approximately how much should be shot in?

Any thoughts would be much appreciated!

Person 1 stands at front of car & holds finger on a full pressure can of wd40 so that it is spraying into the air inlet.
A couple of seconds later, person 2 who is in the car with the GP's glowing, turns the key to crank the motor with foot hard down on gas peddle.
Person 1 continues to spray the wd40 into the air inlet after it starts.
When it picks up extra revs, say goes over 2,000 rpm, person 1 reduces the wd40 spray but does not stop spray if the motor starts to die.
If all is well, eventually the car will run without wd40.

I dont think I missed anything.

t walgamuth · #43 09-13-2012, 03:09 AM

Quote:

Originally Posted by layback40

Person 1 stands at front of car & holds finger on a full pressure can of wd40 so that it is spraying into the air inlet.
A couple of seconds later, person 2 who is in the car with the GP's glowing, turns the key to crank the motor with foot hard down on gas peddle.
Person 1 continues to spray the wd40 into the air inlet after it starts.
When it picks up extra revs, say goes over 2,000 rpm, person 1 reduces the wd40 spray but does not stop spray if the motor starts to die.
If all is well, eventually the car will run without wd40.

I dont think I missed anything.

x2

Also if it has good compression you will hear the starter change speed at each compression stroke. If the rings are shot and or the cylinder walls scored deeply, which can happen with running gasoline, when you crank it over the starter will turn fast and not vary in tone.

southofantarctica · #44 09-13-2012, 10:44 PM

I hadn't had the clear filter is not in place, just a hose going directly into the jug. After continuing to try, I was still not getting anything out of the lift pump. I disconnected the hose from the lift pump and place a finger over the opening to feel if there was suction when cranking. Still nothing. No suction, still as a stone. Ordered another lift pump and hopefully that will fix it.

Photos:
#1 General view of what is going on.

#2 Disconnected line to screw on filter

#3 Disconnected everything

alamostation · #45 09-13-2012, 11:41 PM

I could be all wrong here and my information is related to a VW diesel Rabbit I had 30 years ago.

The trouble with gas instead of diesel isn't the fact that it won't run. It will run but nail like Hell.

The bigger problem is that gasoline is abrasive and will rapidly wear on the close tolerances of the injector pump that diesel fuel is supposed to lubricate.

Don't be surprised if you can run the car on WD-40 sprayed into the intake but not on diesel fuel routed through the injector pump. If the previous owner ran it until it quit, my bet is that he ran it until the injector pump was ruined.