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#1
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Anyone else had repeated problems with the preglow relay (OM 617) in extreme cold?
On my '85 300d, I have had this occur now with three different preglow relays.... When the temperatures drops to about -20 deg C (- 4 deg F) or below, and the car is parked outside all day where I work (no plug-in), the relay won't engage by itself.
That is to say: I have to open the hood and tap or press on the side of the relay for it to engage. Then it works fine. Sometimes, the action of springing open the hood is sufficient. I always blamed this on the relays being old. However, this winter I have one in there that has seen maybe 9 months of use - albeit it's a Huoco. The others were Bosch and Hella and of unknown age.
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Mac 2002 e320 4matic estate│1985 300d│1980 300td Previous: 1979 & 1982 & 1983 300sd │ 1982 240d “Let's take a drive into the middle of nowhere with a packet of Marlboro lights and talk about our lives.” ― Joseph Heller, Catch-22 |
#2
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I'm thinking you have a run of bad relays...
perhaps your hood is allowing water to collect on them?
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John HAUL AWAY, OR CRUSHED CARS!!! 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! My drivers: 1987 190D 2.5Turbo 1987 190D 2.5Turbo 1987 190D 2.5-5SPEED!!! 1987 300TD 1987 300TD 1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere! |
#3
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The moisture aspect had occurred to me as well, which was one reason I bought the Huoco relay, which has the correct orientation for a w123 - that is, the harness with the plugs and electrical connector comes up from below, meaning the relay cover should prevent most or all moisture intrusion (the blank end of the cover faces the windshield when installed).
If you use a relay not from a w123, some are oriented to have the harness connect from the other end of the relay, meaning that the open end of the cover is facing up and toward the windshield, where it is vulnerable to moisture. I know that Clacker, who lives near me, has had the same issue on at least one OM617 relay. I am just curious if it may be a localized issue due to our area's climate, which is moist all year 'round (humidity all summer, lots of freeze-thaw cycles and of course snow in the winter months).
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Mac 2002 e320 4matic estate│1985 300d│1980 300td Previous: 1979 & 1982 & 1983 300sd │ 1982 240d “Let's take a drive into the middle of nowhere with a packet of Marlboro lights and talk about our lives.” ― Joseph Heller, Catch-22 |
#4
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Might be a candidate for a manual glow setup - the classic Ford starter solenoid replacing the electronic glow complexity of the MB unit.
...just a thought. Personally, I'd never go back and the coldest temps we ever see around here is still above freezing. . . . .
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#5
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We've had no issues with my dad's 300SD... or with my 300D. Both were able to start at low temps. The 602 started up in -15F without block heater. The 617 started but wasn't enthusiastic about it as I recall
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Cruise Control not working? Send me PM or email (jamesdean59@gmail.com). I might be able to help out. Check here for compatibility, diagnostics, and availability! (4/11/2020: Hi Everyone! I am still taking orders and replying to emails/PMs/etc, I appreciate your patience in these crazy times. Stay safe and healthy!) 82 300SD 145k 89 420SEL 210k 89 560SEL 118k 90 300SE 262k RIP 5/25/2010 90 560SEL 154k 91 300D 2.5 Turbo. 241k 93 190E 3.0 235k 93 300E 195k |
#6
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Perhaps if you take them apart and coat the contacts etc with some dielectric grease it would keep moisture from freezing key points together... just a thought
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2004 F150 4.6L -My Daily 2007 Volvo XC70 -Wife's Daily 1998 Ford F150 -Rear ended 1989 J-spec 420SEL -passed onto its new keeper 1982 BMW 733i -fixed and traded for the 420SEL 2003 Volvo V70 5 Speed -scrapped 1997 E290 Turbo Diesel Wagon -traded for above 1992 BMW 525i -traded in 1990 Silver 300TE -hated the M103 1985 Grey 380SE Diesel Conversion, 2.47 rear end, ABS -Sold, really should have kept this one 1979 Silver 300D "The Silver Slug" -Sold |
#7
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I've had no glow relay issues in the cold ever on any of our diesels....my 190 has an older Bosch relay and its been doing fine in single digit temps all week.
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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) |
#8
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If you simply it with a manual circuit... probably no chance of problems the rest of your life... or if there are... the cause will be easy to find and cheap to fix...
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1980 240d , chain elongation, cam marks reference: http://www.peachparts.com/shopforum/showthread.php?threadid=10414 http://www.peachparts.com/shopforum/diesel-discussion/305365-9-degrees-chain-stretch.html evap fin cleaning: http://www.peachparts.com/shopforum/showthread.php?t=156207&highlight=evaporator A/C thread http://www.peachparts.com/shopforum/diesel-discussion/297462-c-recommendations-mb-vehicles.html |
#9
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Okay, so I am hearing that I'm the Wile E. Coyote of preglow relays?
I had a Ford solenoid arrangement on my old Coupe. My biggest drawback is that I don't want to mess with the interior of the 300d by installing a switch. The other option is, of course, one of Funola's modified relays.... Which keeps things closer to stock but still requires a switch somewhere.
__________________
Mac 2002 e320 4matic estate│1985 300d│1980 300td Previous: 1979 & 1982 & 1983 300sd │ 1982 240d “Let's take a drive into the middle of nowhere with a packet of Marlboro lights and talk about our lives.” ― Joseph Heller, Catch-22 |
#10
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Why can't you hide the switch a little up under the dash... OR make it a FOOT SWITCH... like the old starter switches were....
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1980 240d , chain elongation, cam marks reference: http://www.peachparts.com/shopforum/showthread.php?threadid=10414 http://www.peachparts.com/shopforum/diesel-discussion/305365-9-degrees-chain-stretch.html evap fin cleaning: http://www.peachparts.com/shopforum/showthread.php?t=156207&highlight=evaporator A/C thread http://www.peachparts.com/shopforum/diesel-discussion/297462-c-recommendations-mb-vehicles.html |
#11
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Let me understand this... you would rather have a stationary vehicle... than one with a non stock switch on the dash.... ?
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1980 240d , chain elongation, cam marks reference: http://www.peachparts.com/shopforum/showthread.php?threadid=10414 http://www.peachparts.com/shopforum/diesel-discussion/305365-9-degrees-chain-stretch.html evap fin cleaning: http://www.peachparts.com/shopforum/showthread.php?t=156207&highlight=evaporator A/C thread http://www.peachparts.com/shopforum/diesel-discussion/297462-c-recommendations-mb-vehicles.html |
#12
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Quote:
I am not for putting a hole in the dash of a two-owner, 119k mile car to accommodate a momentary switch, if I can avoid it. Foot switch won't work with my 14 EEE feet and 6 ft 4 ins height. My left foot is resting firmly on the floor most of the time.
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Mac 2002 e320 4matic estate│1985 300d│1980 300td Previous: 1979 & 1982 & 1983 300sd │ 1982 240d “Let's take a drive into the middle of nowhere with a packet of Marlboro lights and talk about our lives.” ― Joseph Heller, Catch-22 |
#13
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You could hang a switch around the steering column just in the winter...on the left side so no one would see it....
__________________
1980 240d , chain elongation, cam marks reference: http://www.peachparts.com/shopforum/showthread.php?threadid=10414 http://www.peachparts.com/shopforum/diesel-discussion/305365-9-degrees-chain-stretch.html evap fin cleaning: http://www.peachparts.com/shopforum/showthread.php?t=156207&highlight=evaporator A/C thread http://www.peachparts.com/shopforum/diesel-discussion/297462-c-recommendations-mb-vehicles.html |
#14
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Quote:
I had also considered putting a switch with a cover into the tray area behind the shifter, somehow. That would give an excuse to use one of the funky 'arm the nuclear warhead' switches with a flip-up safety cover .
__________________
Mac 2002 e320 4matic estate│1985 300d│1980 300td Previous: 1979 & 1982 & 1983 300sd │ 1982 240d “Let's take a drive into the middle of nowhere with a packet of Marlboro lights and talk about our lives.” ― Joseph Heller, Catch-22 |
#15
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If you go that route, make sure you get a momentary switch not an on-off switch.
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