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Mercedes 300D Suggestions

2231 messages,  Last post on Nov 11, 2009 at 9:21 AM

You are in the Classic Cars Forum. Your Host is mr_shiftright

What is this discussion about? Mercedes-Benz 300-Class, Engine, Fuel System, Diesel, Coupe, Sedan

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#2216 of 2231 Re: Cranks, but won't start [goldcar] by Mr_Shiftright HOST Sep 18, 2009 (8:25 am)
Replying to: goldcar (Sep 18, 2009 8:09 am) You might be able to start the car on one glow plug, by attaching a battery jumper cable to cylinder #1 glow plug and then squirting in just a bit of starting ether. If it kicks off, you know you have a glow plug circuit problem.   How old are these glow plugs? They do wear out you know.   Or you could just try a little starting ether in the air filter housing. That might get you going.   If the car runs then, then you know it's time to replace glow plug circuit parts.   The "fuse" is just a chunk of metal but 80 amps is a serious fuse and I wouldn't bridge it. It's easy to check, just look in the black box there on the left inner fenderwell. Replies to this message: goldcar (Sep 20, 2009 2:16 pm) Mr_Shiftright (Sep 20, 2009 3:00 pm)
#2217 of 2231 Re: Cranks, but won't start [Mr_Shiftright] by goldcar Sep 20, 2009 (2:16 pm)
Replying to: Mr_Shiftright (Sep 18, 2009 8:25 am) All 5 glow plugs are bad, based on the testing I did following the Diesel Giant instructions. I replaced two of them with the Autolite glow plugs I bought from my local Kragen (they don't carry the Bosch in stock). With them and a squirt of starter spray got it running.   I ordered new bosch premium glow plugs for all 5 cylinders. Once they come in, I'll replace the 3 bad ones and the 2 autolites.   Any idea what that box in the middle of my picture is (few posts back) ?   It seems that the throttle linkage that attached to it broke off. I'm just wondering how bad this is. Replies to this message: Mr_Shiftright (Sep 20, 2009 3:00 pm)
#2218 of 2231 Re: Cranks, but won't start [goldcar] by Mr_Shiftright HOST Sep 20, 2009 (3:00 pm)
Replying to: goldcar (Sep 20, 2009 2:16 pm) I don't know what that is---maybe the vacuum pump? My book doesn't identify it and it's been a long time since I worked on one.
#2219 of 2231 cruise control by bcparsons Sep 23, 2009 (1:13 pm)
The cruise control on my 1984 300D Turbo practically never works. Just drove 450 miles and it never engaged. It has worked only once in the last 6 months. Replies to this message: Mr_Shiftright (Sep 23, 2009 1:51 pm) dotish (Sep 24, 2009 10:40 am) Mr_Shiftright (Sep 24, 2009 12:17 pm)
#2220 of 2231 Re: cruise control [bcparsons] by Mr_Shiftright HOST Sep 23, 2009 (1:51 pm)
Replying to: bcparsons (Sep 23, 2009 1:13 pm) Probably the amplifier....common problem. I think you can buy them rebuilt online. Replies to this message: dotish (Sep 24, 2009 10:40 am) Mr_Shiftright (Sep 24, 2009 12:17 pm)
#2221 of 2231 Re: cruise control [Mr_Shiftright] by dotish Sep 24, 2009 (10:40 am)
Replying to: Mr_Shiftright (Sep 23, 2009 1:51 pm) My 1980 300D's cruise control works intermittently. When it's not working (most of the time) the car gradually accelerates after it's engaged until I cut it off. I gave up trying to use it some time ago. Could this problem be caused by the amplifier as well? Thanks. Replies to this message: Mr_Shiftright (Sep 24, 2009 12:17 pm)
#2222 of 2231 Re: cruise control [dotish] by Mr_Shiftright HOST Sep 24, 2009 (12:17 pm)
Replying to: dotish (Sep 24, 2009 10:40 am) definitely possible. It's been a while since I've worked on one. The Haynes manual I'm looking at right now unfortunately doesn't cover this system.
#2223 of 2231 Broken bolt on oil filter housing/cover on 85 300TD by reugenio Sep 26, 2009 (12:28 am)
When tightening the cover to the oil filter housing,one of the bolts broke.Because the remaining portion of the broken bolt is too short to screw in the nut,oil will spill from the top of the housing.How will I take out the damaged bolt and replace it with another bolt so I can firmly close the oil filter housing cover? Replies to this message: brillanze (Sep 26, 2009 5:06 am) Mr_Shiftright (Sep 26, 2009 6:29 am) burdawg (Sep 26, 2009 10:58 am)
#2224 of 2231 Re: Broken bolt on oil filter housing/cover on 85 300TD [reugenio] by brillanze Sep 26, 2009 (5:06 am)
Replying to: reugenio (Sep 26, 2009 12:28 am) There are bolt extracting bits that you can buy -sets are anywhere from $30-50. They work with your drill and get the bolt out. I have also used a tap -make sure it is one that goes in clockwise, so when you screw a bolt in that is the size of the newly tapped hole, unscrewing it will also unscrew the old bolt (hopefully). The bolt extractors are much easier, and if you break a lot of bolts ( I certainly do!) worth the money. You might also be able to rent a set at Home Depot or even Auto Zone. Also -a friendly mechanic might do this for you inexpensively. Good Luck!
#2225 of 2231 Re: Broken bolt on oil filter housing/cover on 85 300TD [reugenio] by Mr_Shiftright HOST Sep 26, 2009 (6:29 am)
Replying to: reugenio (Sep 26, 2009 12:28 am) Oh, are there still some threads left on the broken portion of the bolt. If so, you might be able to "double-nut" it, screwing two nuts on the broken stud, tightening them together, then unscrewing the bottom nut.   If there's no room to screw on two nuts (there should be, as those studs are pretty long aren't they?) then maybe small vice grips.   You'd better be DARN sure that no filings of any kind get into the bottom of the oil filter housing, if you have to do any drilling.   But it looks like from the picture I'm looking at, that no drilling will be required to extract this long stud.

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