w115 240d help - Page 2 - PeachParts Mercedes-Benz Forum

nachoman · #16 02-02-2021, 04:37 AM

this has been 12 months at least ( i even scrapped a series 1 w114, which had way too much rust )

nachoman · #17 02-11-2021, 02:47 PM

I do have another few questions
where can i get the bozio or monark injectors for the om616?
is there a vacum pump repair kit ?
and can the injection pump be rebuilt or best to source one from another model ? ( like a w123 )

cleeves · #18 02-11-2021, 10:21 PM

monarks - google "5 cyl 617 diesel engine fuel injector diy rebuild kit". buy it. should work with 616 except you use 4 instead of 5. check with retailer though. use penetrating oil overnight when needed to break things loose, don't screw up the balancing and lapping, and torque things properly.

vacuum pump - get mity vac and troubleshoot and replace rubber hoses with pelican parts kit or elsewhere. may need new diaphragm.

replace, not rebuild, injection pump, if it cannot be ungunked easily. it is one of the most robust parts in the car but very complex and not DIY friendly.

-Henry

nachoman · #19 02-12-2021, 03:37 AM

thanks , cant seem to find anyone with the injectors... mercedesource has them , but shipping internationally is a challenge at the current moment

cleeves · #20 02-15-2021, 08:52 PM

Quote:

Originally Posted by nachoman

thanks , cant seem to find anyone with the injectors... mercedesource has them , but shipping internationally is a challenge at the current moment

Ah, gotcha. That's who i was suggesting ... good luck.

-Henry

Screwdriva · #21 02-16-2021, 11:56 AM

https://kermatdi.com/i-926-mercedes-early-om-616-617-nozzle.html

I would suggest replacing the nozzles only after performing the steps in my previous post unless the car is running terribly.

CDTurbo001 · #22 02-16-2021, 04:27 PM

I'm with Screwdriva.

If these engines were poorly maintained or never driven aggressively, the rings and pistons get very built up with carbon which increases blowby and decreases compression. Swapping a W123-spec 5 cyl. engine in can be done, but isn't 100% bolt-in. Doing anything you can to make sure the crankcase is venting properly, the internals of the engine are clean, and the fuel system is operating properly should come before deeming a OM61x engine worn and in need of rebuild.

nachoman · #23 02-20-2021, 05:00 PM

Auto-RX is not available in my country.
So I will give the diesel purge a try first.

ive got fresh oil and filters in , and adjusted the valve guides.
also put in some diesel fuel injector cleaner in the fuel tank, although not sure if its made any difference

Sugar Bear · #24 02-20-2021, 05:56 PM

nachoman I'm not trying to be critical but thought you would want to know...valve guides are not adjustable only replaceable. The adjustments made are to the valve clearance between the sliding surface of the camshaft and the rocker arm often referred to as a valve adjustment.

Since AutoRx isn't available you could try a ring soak with a solvent like SeaFoam.

Put clean quality oil, get it hot and push it hard. Go full throttle uphill and let it coast downhill repeatedly, this may free up mildly sticky rings. It won't free a completely stuck ring.

Good luck!!!

nachoman · #25 02-20-2021, 08:08 PM

Sorry , you are correct ( i get my terminology mixed up )

Sugar Bear · #26 02-20-2021, 08:45 PM

No need to apologize...keep up the good work...get that thing hot and push it!

Screwdriva · #27 02-21-2021, 02:03 PM

Quote:

Originally Posted by nachoman

Auto-RX is not available in my country.
So I will give the diesel purge a try first.

Auto-RX wasn't available here either. They ship internationally. I'd suggest ordering 3 bottles. It's worth the trouble to get it.

Diesel purge is a great first step.

nachoman · #28 02-22-2021, 02:03 PM

Ok and here is an odd question
when i stand back and look at the front / rear of my car , it look that the drivers ( remember we drive on the opposite side of the road

) is leaning..
is this the shocks, springs or rubber bushes etc causing this ?

Screwdriva · #29 02-23-2021, 01:39 PM

I had the same problem. (I'm based in London and was raised in Sydney)

I recommend starting with the front and rear sub frame mounts, then sway bar links and the rear differential rubber mount. Use OE Mercedes rubber parts only - yes, still available and lasts 2-3X longer than the Chinese garbage out there. If you don't know when these parts were changed, then the new rubber will really transform the car. I'd wager the rubber has long since dried up and crumbled to bits.

If that doesn't solve the problem, then replace your shock absorbers. Bilstein Heavy Duty are the best bang for the buck.

When you are done, you will have the best handling Mercedes model ever manufactured. It's unlike any other model they made.

nachoman · #30 11-13-2021, 10:21 PM

So an update on progress.
installed new rear sub frame mounts
the lean is gone now

did the diesel purge... no noticeable difference , except the idle was higher but that was fixed with some adjustments to the throttle linkage assembly..

Handling wise and ride wise , it is quiet and smooth , so no complaints there.
engine wise , it needs more power !!!