delivery valve function/ affecting the injection? - PeachParts Mercedes-Benz Forum

Olivier · #1 09-15-2009, 03:05 PM

Hello,
Just wondering, I was on 10% diesel and the rest on WVO and the car took 3 second to start today, too long. But when it fired up, it was not on all six? The engine was wobbling...
I started 2 times, same story. One or more cylinder was not firing.
I let the engine rest for 30 minutes, tried again, all good.
I was thinking it might be the delivery valves ( after all they are 100,000 old, or missing some compression in one pod or both.
Any imputs?
I'm back now to 15 % dino, tomorrow will tell.
Thank you.
Olivier

Diesel911 · #2 09-15-2009, 05:03 PM

Unless you have found some way to keep your Fuel heated when the Car is not being used your fuel system is full of thick fuel when you 1st start your car.

Just moving the Fuel through your Fuel Supply Pump and Fuel Injection Pump will heat it up a little. Thick Fuel must create a lot of friction in the system. This might explain why after it sat 30 min it started and ran OK.

How do you plan to start if it gets colder in your area?

Olivier · #3 09-15-2009, 05:04 PM

It might be as the weather is getting colder, but the car run fine when started. Tomorrow I'll be on the usual winter mixed, 15%.
Still wondering why some fire and some don't and all was Ok when I let the engine rest? This is what I find odd.
Cheers.

Olivier · #4 09-15-2009, 05:17 PM

Hi Diesel 911.
Funny enough, last year I had a heat exchanger with glow plugs and I never had any trouble starting, even minus 6. I took it off as I didn't want to have a bother with the insurance as it was not declared ( extra electrical) and needed a bit of money and I thought it was not really any use ( I always had it and thought it was a normal starting )... But now that I know how much the pump is sucking, and how fast, I think that this device was actually giving the pump some help to start it all properlly.
Time to buy another one perhaps...

TMAllison · #5 09-15-2009, 08:41 PM

IMO opinion the unheated WVO is going to make for rough starts; most unheated blenders use RUG rather than diesel BTW. I don't like either concept personally.

Might be a good time to check continuity of the GP's. They may be getting crudded up and not be burning so hot any longer.

JEBalles · #6 09-15-2009, 08:52 PM

and while trying to diagnose a problem, use 100% petrodiesel.

Ian White · #7 09-16-2009, 01:57 AM

beware or running unheated WVO, you may have problems with rings sticking... Im going through a similar mess now...

Diesel911 · #8 09-16-2009, 02:25 AM

Quote:

Originally Posted by Ian White

beware or running unheated WVO, you may have problems with rings sticking... Im going through a similar mess now...

Marvel MM oil results sticky rings
Origional thread also has + response
http://www.peachparts.com/shopforum/showthread.php?t=258757&highlight=Marvel
Well it loosened the carbon as the compression has increased in the two low cylinders! # 3 was 320 is now 380 and #5 was 160 and is now 340! Drove it about 20 miles hard and fast, there was some carbon coming out the exhaust! Will be taking iton two longer trips this next week: Monday I'll be going over to the coast (SLO) and the SoCa gtg on next Saturday. The trip over the Grapevine should help!
Email response about if it reduced blow-by
The blow by was reduced and also with the nice drive to San Luis Obispo my rpms are lower than they were before! Before 65@3,250 now 2,850, before 70@3,500 now 3,150? and boy does it have power... but the glow plug light is now out (starts ok but the weather is warm. The relay works, so I'll be checking the plugs) and the fuel gauge is dancing (ground?). Oh, well gives me something to do...

I kind or recommended the above use of Marvel Mystery Oil to free up carboned rings. However, if you try this be sure to blow out any excess after soaking by cranking the Engine. Do not want any Hydraulic lock.

The reason I say the above is that I recommended to a person on benzworld who had Black smoke. He took before and after compression readings and while his compression went up his Black Smoke has switched to White Smoke.
Since he did the MM Oil Soak along with 2 other things including adjusting the ADLA; I am not sure if he cracked some Piston Rings with a Hydraulic Lock or the other things he did resulted in the White Smoke.

I did the MM Oil soak on my Volvo Diesel with good results. However, I was careful to blow out any excess Oil.

The benzworld guy is going to do another compression test over the weekend to as his battery petered out on his last one leavnt 2 cylinders in question.

Olivier · #9 09-16-2009, 05:20 AM

Which Marvel Mystery oil are we talking about? I went to their site and they have different products. A picture would be great.
Thank you.
Olivier

Number_Cruncher · #10 09-16-2009, 08:44 AM

Hi Olivier,

>>but run well on WVO

Is that really true?

I know you're a veg devotee, but what would have to happen to convince you that you're not doing your engine much good using this fuel?

nhdoc · #11 09-16-2009, 09:05 AM

In the post you showed the strainer clogged you said you ran 100% diesel...is that true or was the strainer running WVO too before it clogged?

I suspect the PO of my wagon ran some of that crap in it too which is why I have been fighting fuel system problems since I got it. I just don't understand why people think they can dump what is literally other people's trash into their fuel tanks and then find it puzzling why their finely engineered cars don't run right

moon161 · #12 09-16-2009, 10:18 AM

If I ever crack my OM616 open, I expect I'll find the oil control rings plugged up with slime, which would explain the mad oil use I have. PO had the car converted w/ 2 tank, heat exchanger, but the guy with the wrench said OK to leave grease in the engine in the summer.

While I grease, I can't see the sense in blending unless you're fanatical about certain aspects of it, or just want to throw around a beater 240D until it stops. Look up john_galt on frybrid and biodiesel.infopop.com

Olivier · #13 09-16-2009, 11:01 AM

Quote:

Originally Posted by Number_Cruncher

Hi Olivier,

>>but run well on WVO

Is that really true?

I know you're a veg devotee, but what would have to happen to convince you that you're not doing your engine much good using this fuel?

You will never give up

Diesel911 · #14 09-16-2009, 11:04 AM

Quote:

Originally Posted by Olivier

Which Marvel Mystery oil are we talking about? I went to their site and they have different products. A picture would be great.
Thank you.
Olivier

I had no idea they made other products!
The picture will have to wait as what is left of my plastic bottle is someplacel? in my Garage.

Update here are thos pics.
This is a Qt bottle; but the sell a smaller one also.

Olivier · #15 09-16-2009, 11:06 AM

OK, all this as I was on 10%. I was trying different mix this summer, to see what was the best, form 0% , to 5%, to 8% then 10%.
Now I am back on 15%, it seems to be what the car like.
10 degres ish last nigh, the engine fired up in 2.78 seconds, a wee longer then dino but no hiccups and all on 6.
I'll stick to 15% now.
Olivier
I like to know about this oil though. Is it available in the UK?
Cheers.
Olivier