The two bolts underneith are accessible with the housing on or off...

the problem is the one behind the pump...you can get it off with a bit of patience and swearing....

But I have since been unable to put it back on...you do need to take the bracket off with all three bolts to take it out with the housing in place. and If you turn up the wick you will need to do this a couple times..because your results with EGT are very dependent on the wear on the pump and just where it really is now. Meaning what is fine for one car may be way too much for another.. and meanng you can disturb the fine balance of the pump...or not...you realy never know till you drive it.

I can tell that while I have my W116 pump turned up as far as it will take without intercooling ..that it has adversly affected the midrange...meaning the low boost fueling is a bit rich for my taste...but fine offline adn full throttle (below 90 degree ambient temps)

__________________
Proud owner of ....
1971 280SE W108
1979 300SD W116
1983 300D W123
1975 Ironhead Sportster chopper
1987 GMC 3/4 ton 4X4 Diesel
1989 Honda Civic (Heavily modified)
---------------------
Section 609 MVAC Certified
---------------------
"He who fights with monsters might take care lest he thereby become a monster. And if you gaze for long into an abyss, the abyss gazes also into you." - Friedrich Nietzsche

OK, there are three bolts at the IP mounting flange and there is the small bracket at the bottom rear of the IP next to the oil cooler.

You are now saying that there is another bolt, behind the pump?? Where??

you misunderstood me that bracket has three bolts...two under the IP to the block and one to the ip from the back...thats the one you can get off but not back on.....well brandon might...he has longer fingers than me....I gave up trying on that one. Is down way low at the most inaccesible point beween the innermost oil cooler line and the block....you will need a flashlight to see it. A 13mm bolt

__________________
Proud owner of ....
1971 280SE W108
1979 300SD W116
1983 300D W123
1975 Ironhead Sportster chopper
1987 GMC 3/4 ton 4X4 Diesel
1989 Honda Civic (Heavily modified)
---------------------
Section 609 MVAC Certified
---------------------
"He who fights with monsters might take care lest he thereby become a monster. And if you gaze for long into an abyss, the abyss gazes also into you." - Friedrich Nietzsche

Yes, I know this bolt. That's the bolt that I was mentioning must be inaccessible once the oil filter housing is back in place.

So, you cannot leave the bracket attached to the IP and leave this one bolt in place?? The bracket has to come completely off??

exactly...the bracket would prevent the pump from moving rearward if that SOB bolt was in place. I tried...no way around it I found.

__________________
Proud owner of ....
1971 280SE W108
1979 300SD W116
1983 300D W123
1975 Ironhead Sportster chopper
1987 GMC 3/4 ton 4X4 Diesel
1989 Honda Civic (Heavily modified)
---------------------
Section 609 MVAC Certified
---------------------
"He who fights with monsters might take care lest he thereby become a monster. And if you gaze for long into an abyss, the abyss gazes also into you." - Friedrich Nietzsche

OK, thanks for the info. At least I know what I'm now up against.

yeah..you can benifit from our beating our heads against the wall looking for an easier way around it..

You CAN get that bolt off with the housing in place...its just real hard...

if anyone figures out how to put it back on with average sized guy hands let us know. I spent days trying to figure that one out....and the bolt is still off as a result.

__________________
Proud owner of ....
1971 280SE W108
1979 300SD W116
1983 300D W123
1975 Ironhead Sportster chopper
1987 GMC 3/4 ton 4X4 Diesel
1989 Honda Civic (Heavily modified)
---------------------
Section 609 MVAC Certified
---------------------
"He who fights with monsters might take care lest he thereby become a monster. And if you gaze for long into an abyss, the abyss gazes also into you." - Friedrich Nietzsche

Sorry I did not look at this thread again earlier.

It is "possible" to get this bolt out with the oil filter housing in place. But it might take you less time to dismount oil filter housing than to get that bolt out. I have only done this twice, its NOT fun.

BTW- There is only one bolt on the back of the IP, the other two on the bracket are not bolts they are nuts, and they are all 13mm.

Again, sorry I didnt see this thread earlier... anything else I can help with??

Andy, on my three engines (the 2 W116's and the W123) the lower two are in fact bolts just as the rear bolt to the IP.

I got mine off with the housing in place....and I found it far easier than pulling the housing in effort and time. I have not figured out how to put it back on with the housing in place however.

__________________
Proud owner of ....
1971 280SE W108
1979 300SD W116
1983 300D W123
1975 Ironhead Sportster chopper
1987 GMC 3/4 ton 4X4 Diesel
1989 Honda Civic (Heavily modified)
---------------------
Section 609 MVAC Certified
---------------------
"He who fights with monsters might take care lest he thereby become a monster. And if you gaze for long into an abyss, the abyss gazes also into you." - Friedrich Nietzsche

I have done it with the housing in place, the day I got my car running, as Bobk said earlier.

We pulled it out just fine, it was getting it back in later after he left that took so long with that housing in place, if I remember correctly, I used a couple of magnets to help hold the bolt where I wanted it.

Maybe I am mistaking, maybe they are all bolts on that back bracket, and the 3 nuts are on the front...

This thread has PERFECT timing.... while I'm waiting for my driveshaft to show up at home (in the trunk of a friend's car) and since my rear bolt is already not on the IP (long story, below) I can see if its possible for me to get it back on. It would be wonderful to not have to mess with the oil filter housing... save me about 3 hours!!!

I wouldn't drive around too much without that bolt in place... I think the lack of that bolt and typical diesel vibration caused my IP to loosen the lower of the three front mounting bolts. At sustained highway speeds of 80-90, AC, etc (large load and thus large amounts of blowby) it partially blew out the gasket on the IP (as wacky as that sounds, is the MOST logical of all the possibilities), which resulted in leaking 6 quarts of oil every 200 miles. When it was tightened back down, etc can go about 75 before it starts spewing. Been incredibly busy and haven't had the time to fix it, and even with monitoring the bolts it has also brought the timing out of whack in about 7k miles (2.5 months).

I plan to get the IP off of the car tonight, so will post an update sometime to see if that really was my problem...

__________________
John Robbins
'05 E320 CDI - 240k
'87 300TD - 318k