Can I run my om617 without the vac pump for a couple of seconds? I realize it'll probably spray some oil, but, it is like running it without the valve cover (messy but doable) or is it gonna be much worse?

I think it will make quite a mess. I have never run one without it before but I think it caps off quite a bit of oil pressure. Why do you need to run without it?

I was wondering the same thing. Sure would be a simple way to exclude it as a source of the knock. Wish I knew the answer.

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1977 300d 70k--sold 08
1985 300TD 185k+
1984 307d 126k--sold 8/03
1985 409d 65k--sold 06
1984 300SD 315k--daughter's car
1979 300SD 122k--sold 2/11
1999 Fuso FG Expedition Camper
1993 GMC Sierra 6.5 TD 4x4
1982 Bluebird Wanderlodge CAT 3208--Sold 2/13

I don't think it will be near as messy as no valve cover. I don't think it would be that messy at all actually.

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Michael LaFleur

'05 E320 CDI - 86,000 miles
'86 300SDL - 360,000 miles
'85 300SD - 150,000 miles (sold)
'89 190D - 120,000 miles (sold)
'85 300SD - 317,000 miles (sold)
'98 ML320 - 270,000 miles (sold)
'75 300D - 170,000 miles (sold)
'83 Harley Davidson FLTC (Broken again) :-(
'61 Plymouth Valiant - 60k mikes
2004 Papillon (Oliver)
2005 Tzitzu (Griffon)
2009 Welsh Corgi (Buba)

It probably won't be all that messy....there is no "pressure" in there...maybe a bit of blow-by, but minimal.

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-diesel is not just a fuel, its a way of life-
'15 GLK250 Bluetec 118k - mine - (OC-123,800)
'17 Metris(VITO!) - 37k - wifes (OC-41k)
'09 Sprinter 3500 Winnebago View - 62k (OC - 67k)
'13 ML350 Bluetec - 95k - dad's (OC-98k)
'01 SL500 - 103k(km) - dad's (OC-110,000km)
'16 E400 4matic Sedan - 148k - Brothers (OC-155k)

Cover it with a tupperware or something- keep the engine from sucking in anything you don't want in there, keep the timing chain from picking up a stray this or that.

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CC: NSA

All things are burning, know this and be released.

82 Benz 240 D, Kuan Yin
12 Ford Escape 4wd

You're four times

It's hard to

more likely to

concentrate on

have an accident

two things

when you're on

at the same time.

a cell phone.

www.kiva.org It's not like there's anything wrong with feeling good, is there?

x2. Cut something plastic and use a couple of mounting bolts to hold it in place. I'd be more concerned about the fan blowing something into the opening than I would a bit of oil coming out.

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Charles
1983 300D, bought new, 215k+ miles, donated to Purple Hearts veterans charity but I have parts for sale: http://www.peachparts.com/shopforum/showthread.php?t=296386

Yeah it wasnt messy at all, there is some oil on the rotating parts in there but none sprayed out.

The knock still there, gonna go update my other thread about it. This thread was just so that people know that it is possible to run it without the pump if you are troubleshooting noise.

I tried this on my 603... it is WAY more messy then running with no valve cover. There is an oil jet pointing straight out... and it moves a lot of oil in a very brief time Running at idle with no valve cover made almost no mess in my expierence.

-Jason

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1991 350SDL. 230,000 miles (new motor @ 150,000). Blown head gasket

Tesla Model 3. 205,000 miles. Been to 48 states!
Past: A fleet of VW TDIs.... including a V10,a Dieselgate Passat, and 2 ECOdiesels.
2014 Cadillac ELR
2013 Fiat 500E.

Try this, grab hold of your timing device and and see how much lateral play you have. I bought a 240 that had trashed the VP because the bushing in back of the timing device had warn and the timing device was "slamming" into the block with every pump of the VP. That caused a "grove" in the block so there must have a "noise" associated with that. The VP probably looked fine untill the "slamming" finally took it out. I never heard the engine run as I bought the car because of a fire in the cabin. But check that lateral play

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1985 Euro 240D 5 spd 140K
1979 240D 5 spd, 40K on engine rebuild
1994 Dodge/Cummins, 5 spd, 121K
1964 Allice Chalmers D15 tractor
2014 Kubota L3800 tractor
1964 VW bug

"Lifes too short to drive a boring car"

What is the timing device? That round thing that the vacuum pump 'rides' on? the one that looks like it has springs on the other side of it? Can it come out?

Yep, thats it, in back of that T/D there is a brass bushing, which is a "ware item". anyway I had about 3.5 mms of lateral play which is way too much but I dont know whats allowable. Its something to check when you have the VP off, I had never heard of the problem before I saw it. I believe "Kerry" had a smellier problem.

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1985 Euro 240D 5 spd 140K
1979 240D 5 spd, 40K on engine rebuild
1994 Dodge/Cummins, 5 spd, 121K
1964 Allice Chalmers D15 tractor
2014 Kubota L3800 tractor
1964 VW bug

"Lifes too short to drive a boring car"

Trust me - it will be messy. I inadvertently did this when I was in the middle of swapping the VP on my old 300TD.

You see, the engine lub system squirts oil into the VP. If the VP is not in place, guess where the oil goes.....

Also, the engine does not create the vacuum. Only the VP does that.

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the sooner you start... the sooner you'll get done If it ain't broke, don't fix it.. Its always simpler to tell the truth...
2007 Honda Accord EX
2007 Honda Accord SE V6
96 C220
97 Explorer - Found Another Home
2000 Honda Accord V6 - Found Another Home
85 300D - Found Another Home
84 300D - Found Another Home
80 300TD - Found Another Home
Previous cars:
96 Caravan
87 Camry
84 Cressida
82 Vanagon
80 Fiesta
78 Nova
Ford Cortina
Opel Kadet
68 Kombi
Contessa

That would be something like starting the car with the instrument cluster out oops

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1985 Euro 240D 5 spd 140K
1979 240D 5 spd, 40K on engine rebuild
1994 Dodge/Cummins, 5 spd, 121K
1964 Allice Chalmers D15 tractor
2014 Kubota L3800 tractor
1964 VW bug

"Lifes too short to drive a boring car"