Two of the glow plugs on the 91 have been in there about 55k miles...the other three are more recent. One of the old plugs is bad, the other still works. I will replace both at the same time when I take it in....but I want to wait till it needs other work done. Everything else in perfect shape right now!

If that other plug goes out, think I could make through a New England winter on three plugs?

For what it's worth, I'm confident compression is good.

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14 E250 Bluetec 4Matic "Sinclair", Palladium Silver on Black, 160k miles
06 E320 CDI "Rutherford", Black on Tan, 180k mi, Stage 1 tune, tuned TCU
91 300D "Otis", Smoke Silver on Tan, 145k mi, wastegate conversion, ALDA delete

19 Honda CR-V EX 79k mi
Fourteen other MB's owned and sold
1961 Very Tolerant Wife

GPs on a 602 is a pretty easy DIY with basic tools.

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CENSORED due to not family friendly words

I don't have experience with OM602. What I can tell you is that Om603 will not start with 3 GP in SoCal weather. It happened to my 300SDL. However no one can tell for sure what might happen. I would always try to have all working GP if it were my car.

Btw, GP don't go out one by one. One or more can go out at the same time or very close.

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Not MBZ nor A/C trained professional but a die-hard DIY and green engineer. Use the info at your own peril. Picked up 2 Infractions because of disagreements. NOW reversed.

W124 Keyless remote, PM for details. http://www.peachparts.com/shopforum/mercedes-used-parts-sale-wanted/334620-fs-w124-chasis-keyless-remote-%2450-shipped.html

1 X 2006 CDI
1 x 87 300SDL
1 x 87 300D
1 x 87 300TDT wagon
1 x 83 300D
1 x 84 190D ( 5 sp ) - All R134 converted + keyless entry.

The NA 602 2.5 that I had started pretty easy one plug down, IDK about 2. I used it in a real cold winter for us, -15 or -20F.

I forget if that was an intake off job or not, to do the glow plugs. Worst part of intake off work on the 602 is remembering where all the vacuum hoses go and getting them there.

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CC: NSA

All things are burning, know this and be released.

82 Benz 240 D, Kuan Yin
12 Ford Escape 4wd

You're four times

It's hard to

more likely to

concentrate on

have an accident

two things

when you're on

at the same time.

a cell phone.

www.kiva.org It's not like there's anything wrong with feeling good, is there?

Cold starting also depends on the condition of your injectors and the cranking speed as well as compression

Got a block heater that will keep everything toasty?
A massive cold crank top notch battery?
Do you feel lucky?

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95 E300D gave away
77 300D, 227k, station car
83 300CD 370k, body gone away to the rust gods, engine is in a Yota pickup, going strong
89 190E 2.6- 335k, no more
79 VW FI Bus- 154k summer driver
59 VW Beetle ragtop- 175k
12 VW Jetta- 250k
74 MG Midget-78k

One afternoons work? Not sure why you're waiting.

My naturally aspirated OM602 wouldn't start with a couple of bad glow plugs. I replaced them all.

Based on what I've seen a 617 do in a Nevada winter with two GPs out, I wouldn't want to find out the hard way in a New England winter. 617 glow plugs are stupid easy. Not sure about a 602.

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Whoever said there's nothing more expensive than a cheap Mercedes never had a cheap Jaguar.

83 300D Turbo with manual conversion, early W126 vented front rotors and H4 headlights 401,xxx miles
08 Suzuki GSX-R600 M4 Slip-on 26,xxx miles
88 Jaguar XJS V12 94,xxx miles. Work in progress.
99 Mazda Miata 183,xxx miles.

IDI diesels need GP's to start, especially in winter and especially in a New England winter (I would guess).

The equivalent would be Northern Iowa or MN I would think. That car would not start in Iowa in February...TBH, even southern Iowa.

Steve

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Steve A
92 W140 OM603
97 VW Jetta TDI
90 Passat variant TDI 6 speed MT
94 Chevy K1500 6.5TD
05 E320 CDI
+ others

My OM617 5 cyl will start on 2 glow plugs on a 50F morning, but takes some encouragement and it starts out very rough. I recall that 3 working glow plugs is the minimum for the dash lamp to light, so that might be M-B recommendation. I did verify that it won't start on no glow plugs, even with much cranking on a 75 F day, as I once had the GP relay box out for crash repairs and just wanted to move the car. I had to jumper 12 V to 3 glow plugs to get it to fire.

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1984 & 1985 CA 300D's
1964 & 65 Mopar's - Valiant, Dart, Newport
1996 & 2002 Chrysler minivans