Beware of "available at your local auto parts store". Brand will make a significant difference in longevity. Many here have reported Autolite plugs not even lasting a season but they can get you by in a pinch. The best brand for this is Bosch, and NAPA is a good local source if you're in a rush. Better yet, order them here at Peach Parts, you might be surprised how quickly they can get them to you!

__________________
Sam

84 300SD 350K+ miles ( Blue Belle )

Before I knew better I bought Autolite Glow Plugs. I live in S CA and it is not cold here.

I changed the Glow Plugs and did not have a Reamer. 6 months later when I got a Reamer I removed the Autolite Glow Plugs and found that 2 of them had the tips swollen and I had to use a Vice Grips and a lot of twisting and Spraying with WD-40 to get them out. I was afraid they were not going to come out at all.

I replace the Autolites with Monarks as I had already bought them. Monarks are not good either. One of the Monarks failed a year later.

I replaced them with Bosch over 3 years ago and have had no Glow Plug Failures since then.

There are local places that sell Bosch Glow Plugs but they are like $15-$16 each.

Somewhere in the Forum there is pics of Autolite Glow Plugs where it looks like the tip actually exploded.

__________________
84 300D, 82 Volvo 244Gl Diesel

I think this is what you refer to.

Autolite remanufactured starters, are they any good?

Glow Plug Help


.

__________________
ASE Master Mechanic
asemastermechanic@juno.com

Prototype R&D/testing:
Thermal & Aerodynamic System Engineering (TASE) Senior vehicle instrumentation technician.
Noise Vibration and Harshness (NVH).
Dynamometer.
Heat exchanger durability.
HV-A/C Climate Control.
Vehicle build.
Fleet Durability
Technical Quality Auditor.
Automotive Technical Writer

1985 300SD
1983 300D
1984 190D
2003 Volvo V70
2002 Honda Civic

https://www.boldegoist.com/

Apply dielectric grease to the glow plug when reinstalling, or no?

__________________
1982 240D - 292,000 miles and counting
Same family for 33 years
Newly rebuilt Monark injectors
Newly replaced clutch
New Bilstein shocks

A never-seeze compound also works.

__________________
84 300D, 82 Volvo 244Gl Diesel

I've never put anything on them. No problems so far.

__________________
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 400,xxx miles
08 Suzuki GSX-R600 M4 Slip-on 22,xxx miles
88 Jaguar XJS V12 94,xxx miles. Work in progress.

I don't think you have to on the Engines with Iron Cylinder Heads unless live some place where it is extremely damp.
I have seen pics of Engines on the Forums that have scaly rust on them. If you live someplace that sort of thing happens it could be a good idea to put something on the Threads of the Glow Plugs; even if it is some Wheel Bearing Grease.

But, on the Engines with the Aluminum Head you need to put something at least on the threads of the Glow Plug.

__________________
84 300D, 82 Volvo 244Gl Diesel