Hi: I have a 79 300td and an 82 300td parts car, and I suspect that the 79's vacuum pump is bad. Does anyone know if I can swap in the 82's V. P. and perhaps T the air cleaner hose into the hose coming out of the valve cover? (the 82's VP is not connected to the air filter housing).

Thanks!

Yes, it is possible, with a few changes.

The crankshaft pulley and power steering bracket must be swapped for the 1982 style, or the belt will ride against the piston vacuum pump housing.

I may have also swapped the water pump pulley.


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Thank you!

Hi, and thanks in advance.

I have rookie question: Any thoughts regarding the best approach to detaching the main vacuum hose from the plastic (?) tee hoses with ringed male ends?

Heat?

I just don't want to take them apart diagnostically and damage / ruin them.

Bradley

While cleaning my shop desk this morning I ran across the bushing that caused the vacuum pump on a 240D of mine to fail. There was 2.5mm of lateral slop when I moved the timing device on the intermediate shaft. It had slammed back and forth beating the daylights out of the VP and engine block. I caught it before the engine was destroyed.

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Steve



1985 Euro 300TD 5 spd 218K
1985 Euro 240D 5 spd 120K
1979 240D 5 spd, 40K on engine rebuild
1994 Dodge/Cummins, 5 spd, 121K
1964 Allice Chalmers D15 tractor
1964 VW bug

Giving money and power to government is like giving whiskey and car keys to teenage boys. P.J. O'Rourke

Good catch - did you check the vertical play on the oil pump drive as well?

Because the horizontal bit shuttles back and forth the vertical bit takes a bashing too.



{Note to turbo owners => Only applicable for us non turbo OM617 / OM616 owners!)

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1981 W123 300D ~ 100,000 miles / 160,000 km - project car stripped to the bone

Don't leave that there - I'll take it to bits!

Everything else looked good and the engine is still going. The bushing that the slotted oil pump drive goes through didn't seem to be effected. That engine came out of a parts car I bought that had caught fire and toasted the interior. It had been a nice rust free car which I still have for body parts.

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Steve



1985 Euro 300TD 5 spd 218K
1985 Euro 240D 5 spd 120K
1979 240D 5 spd, 40K on engine rebuild
1994 Dodge/Cummins, 5 spd, 121K
1964 Allice Chalmers D15 tractor
1964 VW bug

Giving money and power to government is like giving whiskey and car keys to teenage boys. P.J. O'Rourke

Rust free - wow really? I've never seen a rust free one before - you make me jealous!

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1981 W123 300D ~ 100,000 miles / 160,000 km - project car stripped to the bone

Don't leave that there - I'll take it to bits!

Yah, its an automatic that was owned by a woman in my neighborhood. She drove home from work, parked in front of the house, heard a buzzing sound coming from under the dash. She came out next morning and it must have looked to her like someone had come during the night and tinted the windows. I guess the lesson is DONT IGNORE STRANGE NOISES.

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Steve



1985 Euro 300TD 5 spd 218K
1985 Euro 240D 5 spd 120K
1979 240D 5 spd, 40K on engine rebuild
1994 Dodge/Cummins, 5 spd, 121K
1964 Allice Chalmers D15 tractor
1964 VW bug

Giving money and power to government is like giving whiskey and car keys to teenage boys. P.J. O'Rourke

what vac output should a om617 have? my pump is cranking about 8 inches of vac.

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1982 300sd from craigslist $800 greased on one tank with NO CONVERSION *edit: now with glowplug heater installed* down here in the hot Texas sun

A good Vacuum Pump should put out 22-24 in Hg.

I don't think My Vacuum was that Low but I was having Hard breaking. And I removed and sprayed out the Vacuum Pump Check Valve that is right under where the Main Line Attaches to the Vacuum Pump and it restored My Vacuum.

Some have found the internal parts of the Check Valve Broken or even missing.

Don't use Brake Cleaner as part of the Valve is Plastic and the Brake Cleaner may soften the Valve.

This is a barrowed pic. All of the parts you see are not supposed to be loose like they are. They are supposed to be inside of the vlave.

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84 300D, 82 Volvo 244Gl Diesel

I would not start your car again until you have pulled the vacuum pump and inspected it.
mine started having low vacuum, and then it took out the chain at 40mph...
pull the pump and inspect it. also inspect the pump cam ramp that drives the pump for wear, also measure any play in the timing device the ramp is mounted to. if all checks out, then put it back together, and find your vacuum leak. 8 is far too low.

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John ongoing strip party!!! HELP ME keep the cars out of the crusher! A/C Thread
"as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do!
84 240D 5speed & 84 300 4Speed
67 rs Camaro, Dodge Pickup, parts cars 78 300D, & 93D(no doors?),85 SD, 83 SD, 85 300D, 85Euro 300TD, 87 300TD, 95E320 T
Daily Drivers 82 SD, 87 300TD, 87300TD!!!!,

A few random thoughts. I see no reason the end play of the ramp component cannot be checked with the chain on. Using a dial gauge.

Also never having a 603 type pump apart but looking at a picture. Could not the bearing shaft be pressed out and an open bearing just replaced with a caged or sealed one? Should be far less than 15.00 for a decent one at a bearing supply place. The shaft diameter is critical but a small outside diameter diferance not so much if this turns out to be a real oddball size. I doubt it would though.

Just from the posted picture unless I am missing something the bearing change looks doable. If this is true the choice of a replacement bearing must be considered.

Also does lifespan of the pump depend partially on vaccum leaks? The pump would experience more work and wear possibly with vacuum leaks. I
posted this last item a long time ago as a possible good reason to get rid of vacuum leaks besides the operational considerations of having them.

There must be some reason people have not been changing the bearing out. Perhaps just because after failure it is not possible usually and the mind is preoccupied with the damage.

Pre emtive strikes are another thing though. I could see people missing that. The swiveling yoke could be rebushed if there is enough meat to do it as well. I suspect it has no bushings but again have not looked at them. If bushed again a bearing supply house should have suitable replacements if required. In otherwords is an at home pre emptive partial rebuild of the parts that may cause serious issues possible? The 603 pump is far from cheap new.