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Old 12-20-2004, 04:50 PM
phidauex's Avatar
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Join Date: Oct 2004
Location: St. Louis, MO
Posts: 806
Mercury in Retrograde, a holiday tale about glow plugs

My mother recently told me that Mercury was in retrograde, and that the astrological phenomenon was largely targeted toward vehicular abnormalities. As soon as she detected the cosmic vibrations of a retrograde Mercury, she ran outside to find a spurting gas leak from the fuel line on one of her old VW Beetles. Her friend Sage's alternator stopped charging as well, heralded by the vicious machinations of a wayward planet.

She told me this shortly before my girlfriend and I drove from Missouri to Colorado, as a warning to keep an eye on my vehicle's condition. I was unconcerned, because the '82 300TD was in tip-top shape, and had just recieved a complete routine service. However, upon arriving in Colorado, I realized there was a problem. Normally I ignore my mother's crack-pot ravings, since they are usually the shameful result of a diseased mind, worthy more of pity than consideration. However, this time I looked up to the sky and felt Mercury's baleful gaze upon my engine. With the car in Colorado and half our trip completed, I began to have trouble starting the car. With each crank of the engine, and each failed start, I got very uneasy.

I applied to my skin a tincture of essential oils, and marked myself with ashes. Clutching a dream-catcher in one hand and my trusty digital multimeter in the other, I attempted to open the hood of the car. As I pulled the grill tab, I heard laughter in my ears as the tab snapped off in my hand.

20 minutes later I had utilized a bless'd charm and some zip-ties to repair the hood latch, and was finally able to reveal the engine compartment. With a zealous fervor, I began troubleshooting the electrical system. The engine would crank fine, but the pre-glow lights were not lighting up, meaning there was a problem in the glow plug system. I disconnected the relay and began checking the glow plugs one by one. Lo and behold, plugs #1 and #3 were open-circuit. The diesel engine will start when one glowplug is out, but with two out, the engine could not preheat enough to overcome the chilly weather and malevolent planets.

That evening I eventually was able to start the car by boiling a few gallons of water, and slowly pouring the hot water over the cylinder head. As the temperature of the head rose, so to did my chance of starting on only 3 plugs. A few solid cranks later, and my brother and father who had come out to help me cried out in victory as the engine sprung to life. It misfired horribly, and the smoke of unburned fuel belched from the rear, but it ran. After several minutes, all 5 cylinders were firing, and the engine smoothed down. I allowed it to idle until it reached operating temperature, and drove it to my girlfriend's house.

Our prognosis was clear, keep the engine warm until replacement glowplugs could be aquired. With some help from TomJ, I learned that AutoZone carries a Bosch plug, P/N 80006 that is a good fit for $7.99. Checker also carries a suitable plug, of the Autolite brand for $8.49.

The car got us to and from Boulder and Denver, starting just fine as long as the engine was not allowed to return to ambient temperature. Upon arriving home, my dad and I ripped out the offending plugs and replaced them. I'll be replacing the other three soon, since once one plug goes, the rest usually follow close behind. With new plugs, the car started like it was brand new, and has continued to do so ever since, safely returning us to Missouri. Even this morning when the weather was a bitter 18 degrees F, it started on the first try.

Clearly Mercury's vile retrograde is no match for a little perseverance, and a holy multimeter. Go in peace, my children, and keep your eyes on the little things this winter.

Peace,
Sam

P.S. Anyone got a grill pull-tab assembly from a W123? The bright yellow zip-ties are doing the job, but aren't the classiest looking thing in the world...

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"That f***in' biodiesel is makin' me hungry."

1982 300TD Astral Silver w/ 250k (BIO BNZ)
2001 Aprilia SR50 Corsa Red w/ 5.5k (>100 MPG)

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Old 02-05-2014, 11:43 PM
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Join Date: Feb 2014
Posts: 4
Looking for info and came across your old post.

This is some funny stuff, Sam. Glad you were able to get it working. Ten years ago. Did you end up marrying that girl?

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