If you page down this site shows where the freeze plugs on the injection pump side are.

https://www.benzworld.org/threads/om617-engine-reseal-make-that-a-rebuild.3068366/

Post 3 has a pic of where the freeze plugs are on the opposite side.

OM617.952 block available near Boston for free

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84 300D, 82 Volvo 244Gl Diesel

Thanks. Yep, it’s the one right by the pump up near the front of the engine. The pump doesn’t give much space for any kind of tool.

I’m leaning in the direction of disassembly of the filter and pump to properly change both plugs. It’s just the lazy devil in me trying to find some way to sneak the leaking plug in without all the work.

I have to wait for the MB plugs. If I’d ordered the Febi they were in stock at Pelican and I could have will called them. Oh well, probably better put down the wrenches and spend some time with family this week.

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79 300TD “Old Smokey” AKA “The Mistake” (SOLD)
82 240D stick shift 335k miles (SOLD)
82 300SD 300k miles
85 300D Turbodiesel 170k miles
97 C280 147k miles

It's cold and yucky outside so here a couple pics of the plug driver. It's about 19" overall which I'm guessing is going to be too long to fit between the block and the inner fender with enough room to hit it with a hammer. It can be cut shorter but even then, I don't think it will work for the pump side of the block. From the pics linked above, the plugs are too well hidden by the pump and filter. The other item is the plug remover. It's not so useful. I just drive a sheet metal screw into the plug near the edge then pry it out.

Michael

Attached Thumbnails

   

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Usta haves '69 250/8, '76 280C, 1971 250C 114.023, 1976 450SEL 116.033
Current have, 1983 300SD 126.120

Michael,

Thanks for looking at that. I was still holding on to some hope I wouldn’t have to remove my pump but hey, I’m gonna do it right.

Got some neat things coming up that interrupted the freeze plug leak conundrum tho. My local glass installer got me a new windshield and is going to put it in Monday. So I decided I better not disassemble the car in case we need to move it around. It was kind of a surprise. He said he’d look for glass a couple of weeks ago.

Then the Santa Ana winds tore through socal last night. Took some tiles off my roof and left them hanging treacherously over the eaves. I need to secure those before a family member gets killed.

I’ll post back with photos as I tear this thing down. It actually looks pretty routine. I think I’d just been avoiding it because I didn’t want to deal with the oily mess when the filter comes out. On all my cars when the filter gasket has leaked I just tighten the bolts an 1/8 turn and the leak has stopped. I’ve never had to remove one.

Then my ip gasket started leaking a few years ago. Then I noticed the PO had rounded off the bolt holding the IP on. No fancy S wrench will get it off now. Everything has to come out and I have to hit it with an extractor.

After it is all out I’d love to time it. I think it can benefit from a degree early. All these cascading issues. I think it’s time to tackle the things all in one blow…after the glass goes in.

Happy Thanksgiving!

Time to pay attention to my family.

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79 300TD “Old Smokey” AKA “The Mistake” (SOLD)
82 240D stick shift 335k miles (SOLD)
82 300SD 300k miles
85 300D Turbodiesel 170k miles
97 C280 147k miles

Sounds like it's kinda busy at your house this week!

Is the glass for a W126? I desperately need a windshield for the 300SD. I've reached out to a couple or 3 installers and either gotten no response or nope, not even gonna try.

Happy Thanksgiving

My family is napping...

Michael

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Usta haves '69 250/8, '76 280C, 1971 250C 114.023, 1976 450SEL 116.033
Current have, 1983 300SD 126.120

Yes, it’s for the 82 300sd. It has gotten pretty pitted over the years. I figured if I’m going to keep the car I should replace it while I still could find glass.

Apparently they are getting it from these guys.

https://www.pilkington.com/en/us/automotive/automotive-agr

We will see how it goes. I’ve changed a few old style glass and seals but the w126 is a glue in style. I’m not too familiar with the removal of one of those. I’ve seen a tool that uses a thin wire to cut the urethane like a cheese cutter. I’m gonna let the pros handle this.

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79 300TD “Old Smokey” AKA “The Mistake” (SOLD)
82 240D stick shift 335k miles (SOLD)
82 300SD 300k miles
85 300D Turbodiesel 170k miles
97 C280 147k miles

I wish my windshield was only pitted; see attached pic.

My hood hinges had not been connected for like 10 years and I had the hood propped with a stick. I went inside my house and while gone a strong gust of wind forced the hood back and into the windshield.

Attached Thumbnails

 

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84 300D, 82 Volvo 244Gl Diesel

Diesel911, yours looks worse than mine!

When we bought the car, the wipers had a date code of 2013. To say that the glass is scratched is an understatement. We also managed to crack the lower left corner while installing the hood.

ykobayashi, if you'd let me/us know how the install went, I'd appreciate it.

Michael

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Usta haves '69 250/8, '76 280C, 1971 250C 114.023, 1976 450SEL 116.033
Current have, 1983 300SD 126.120

ok I finished it up. About six hours of work. I went pretty slow.

Here are the highlights or lowlights.

Took two hours to get the pump and filter out. My rounded off nut on the IP came out easily with a six point socket.



Once it was out it was easy to punch the plugs out. And then put them back in. Got one up near the IP and one down near the oil filter.

Did I push it in too far? I tried to do it like it was when I pulled it. I looked at my 300d and they're at about this depth.



The plug was pitted on the backside. I believe this is how it failed. It got a pinhole. Looks like I'll be doing the other side at some point. Till then I think I'll keep a can of bars leak in the trunk just in case it starts leaking when I'm far from home.

The middle of the plug seemed to have a brown shellac on it. Not rust. Maybe bars leak added in the past.



Kind of a bummer when I put my filter back on I noticed one of the three legs on this oil backflow valve was gone. I may have knocked it off when I took the filter housing out. It was a tight fit. Or maybe it just broke. Hope I don't need it. It's called the Star Valve in the FSM. Looks like a valve t keep oil in the filter when you shut the car down. I decided to just run it like this. Hope it doesn't matter.



All back together. I still need to time it.

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79 300TD “Old Smokey” AKA “The Mistake” (SOLD)
82 240D stick shift 335k miles (SOLD)
82 300SD 300k miles
85 300D Turbodiesel 170k miles
97 C280 147k miles

You've been way more productive than I've been lately!

I'd say you got the plug in to the right depth although I'm not an expert. My assumption has always been that it should go in just deep enough that the outer edge of the plug is fully into the bore so that it can "bite" into the bore for better retention since that's probably the largest dimension of the plug.

I'd avoid Bar's Leak like the plague based on the current condition of my truck. A can or two was used in the past to deal with a leaky radiator. I've had a few explosive issues since then, blew the upper hose one time and most recently, blew the lower hose, broke the thermostat housing and popped a plug out of the block. Put all back together only to find I'd also cracked the block. Finding a good used Ford FE 390 has been more difficult than finding a MB diesel block. My thinking is that the Bar's Leak stuck the radiator cap shut, causing a build up of pressure well beyond design specs. No matter how well I purged the cooling system, there was a bunch of gunk built up in the radiator neck and on the cap seal. Even after replacing the radiator and water pump plus flushing the junk out of the cooling jacket around the plug that later blew out.

How hard was it to pull the oil filter off? Did you pull the pump first? I ask for a friend with a leak behind the filter housing.

Michael

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Usta haves '69 250/8, '76 280C, 1971 250C 114.023, 1976 450SEL 116.033
Current have, 1983 300SD 126.120

Yeah I’m sore. Took an ibuprofen and I’m hitting the hay.

It wasn’t hard to pull off. I have a huge collection of socket extensions, tiny ratchets, wobble joints. Also useful was a cut down Allen key to get between the power steering case and one of the socket caps.

What was hard was getting the turbo oil line back on. It didn’t perfectly line up with the banjo bolt and it was difficult to get the bolt started. Also I had to take the oil cooler line mount off to free up the lines a bit. This was hard to get off and on.

I pulled the IP and filter. My ip had a damaged bolt on the rear mount that I’ve been meaning to pull out for years.

I don’t think I could have gotten the pump off without removing the filter. It’s tight in there. I’ve heard people doing it but it is tight.

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79 300TD “Old Smokey” AKA “The Mistake” (SOLD)
82 240D stick shift 335k miles (SOLD)
82 300SD 300k miles
85 300D Turbodiesel 170k miles
97 C280 147k miles

Oh no. I started the car and it was fine. No leaks.

I left the ip bolt at the back of the pump loose so I could tweak the timing then lock it down.

After I checked timing I noticed the back bolt worked it’s way loose from the engine vibes.

There appears to be no way I can get this thing back in without tearing a lot of stuff down…again.

Any tricks to sneak it in there?

I recall reading someplace that people often leave the bolt off because it’s too much of a hassle. Is this dumb?

Such a downer. Part of the reason I went back there and did all this work was to remove the rounded off bolt that was in there. Now I have no bolt.

ETA - hey I found diesel 911’s thread about removing the pump. I think I’ll try some the tricks like removing the rack bolt, loosening the oil lines and pulling the male oil fittings off the filter housing.

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79 300TD “Old Smokey” AKA “The Mistake” (SOLD)
82 240D stick shift 335k miles (SOLD)
82 300SD 300k miles
85 300D Turbodiesel 170k miles
97 C280 147k miles

Update! Got the bolt in. I took off the rack bolt and upper cooler hose. There was just enough room to slip my hand in. I held the bolt and washer with a small magnetic pickup tool from above as I worked it in. I held the washer on with bearing grease.

All cleaned up. Hoses all in. Time to test drive. Looking forward to seeing through my new windshield.

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79 300TD “Old Smokey” AKA “The Mistake” (SOLD)
82 240D stick shift 335k miles (SOLD)
82 300SD 300k miles
85 300D Turbodiesel 170k miles
97 C280 147k miles

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“Whatever story you're telling, it will be more interesting if, at the end you add, "and then everything burst into flames.”
― Brian P. Cleary, You Oughta Know By Now

Yes!

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84 300D, 82 Volvo 244Gl Diesel