Project Car: 1978 240D 4 speed "Uttini" - Page 11 - PeachParts Mercedes-Benz Forum

funola · #**151** 07-15-2014, 03:16 PM

Quote:

Originally Posted by TheDon

I agree, it could be any one of those things. It would probably be best to get a compression reading anyways to see how healthy the engine is. I'm probably going to take the injectors over to my mechanics place and pop test them/ clean / rebuild them. I'll need to see about a drop timing tool so I can verify it's timed properly as well. The pump doesn't show any signs of it having been moved.

Were you getting fuel out of the cracked injector line nuts at the injectors?

dude99 · #**152** 07-15-2014, 06:17 PM

Are you in a position where tow starting it would be an option? There have been a few cases on here of 617/616 engines that have sat a long time and would not start using convention methods however started with a tow start and were fine after that....

funola · #**153** 07-15-2014, 06:21 PM

If it starts from pull starting and runs well enough , that would be good confirmation of low compression.

dude99 · #**154** 07-15-2014, 07:39 PM

I believe it was Mike-81-240D (on the other side) had a 300D that had been sitting for some time that wouldn't start without a tow. However after the initial start it was fine and had no issues.

A few rings might be stuck resulting is low compression, tow starting it and giving it a good Italian tune up might knock them loose and solve the issue.

TheDon · #**155** 07-15-2014, 08:05 PM

I sent the injectors off to get pop tested and balanced anyways, they will need it. Before I tow start anything I need to bleed the clutch hydraulics. The shifter mechanism really needs a rebuild too.

cooljjay · #**156** 07-15-2014, 09:40 PM

Can you post a video of the car cranking over? So we can see if the starter is turning fast enough?

To get one of these guys, to wake from their slumber, you really need a good starter, cables battery x2.....pull starting it may very well be the way to go.

Here's some pics of the belts, don't mind the arizona sand/dust...

TheDon · #**157** 07-15-2014, 11:52 PM

It seems like it's spinning fast enough to me. I'll take a
Video tomorrow

The belts look better than mine. The chrome on mine is covered in corrosion.

P.C. · #**158** 07-19-2014, 05:07 PM

Update?

TheDon · #**159** 07-21-2014, 01:42 PM

I was in Idaho and then Boston so no new news. I sent my injectors out to be cleaned, balanced and potentially rebuilt if necessary.

Thinking about going out and bleeding the brakes and ten the clutch hydraulics.need to read up on the clutch bleeding as I've heard it can be a pain

funola · #**160** 07-21-2014, 02:08 PM

Quote:

Originally Posted by TheDon

I sent the injectors off to get pop tested and balanced anyways, they will need it. Before I tow start anything I need to bleed the clutch hydraulics. The shifter mechanism really needs a rebuild too.

You do not need to bleed the clutch to tow start. The clutch is always engaged by default. Put it in 4th, turn key to glow/ pull.

ROLLGUY · #**161** 07-21-2014, 03:06 PM

Quote:

Originally Posted by funola

You do not need to bleed the clutch to tow start. The clutch is always engaged by default. Put it in 4th, turn key to glow/ pull.

Bad idea. What happens when it does start and he has no way to disengage the clutch? The car runs into the tow vehicle? Sounds pretty irresponsible (and maybe a dumb idea) to try this. I would make sure the clutch (and brakes) are working properly before trying to pull start a car. That is just the opinion of a responsible individual, you can do what you like.....Rich

funola · #**162** 07-21-2014, 03:15 PM

Quote:

Originally Posted by ROLLGUY

Bad idea. What happens when it does start and he has no way to disengage the clutch? The car runs into the tow vehicle? Sounds pretty irresponsible (and maybe a dumb idea) to try this. I would make sure the clutch (and brakes) are working properly before trying to pull start a car. That is just the opinion of a responsible individual, you can do what you like.....Rich

You are making it a bigger deal than it is. To avoid ramming the tow vehicle, you can shift into neutral without the clutch (whatever you do, don't step on the throttle), you can step on the brakes, you can turn the ign off. Of course, don't try tow starting if you are an uncoordinated klutz. Brakes always a must. Clutch not so.

TheDon · #**163** 07-21-2014, 03:44 PM

I'm probably just going to wait to tow start until I have the brakes working as they should and the clutch pedal

funola · #**164** 07-21-2014, 03:59 PM

Quote:

Originally Posted by TheDon

I'm probably just going to wait to tow start until I have the brakes working as they should and the clutch pedal

You should post a sound file of your engine cranking so I can tell you if you are meeting minimum RPM, which is around 130 (ideally you want 150 or higher). Getting it started with the starter motor is hell of a lot less hassle than tow starting. Now that you have the injectors out, it is the perfect time for a compression test. I'd suggest doing that before the tow start, which is a last resort IMO.