2H Glowplugs

hi Willem,
looking in my 2H engine manual it says they used either a super glow type with a variable delay glow timer or a fixed delay glow timer. The plugs type is not mentioned but it does say not to apply more than 7V when testing the plugs or they could be damaged.

If you have a multimeter or a small test light the plugs are easy checked once you removed the busbar that connects all of them together. There may be resistors fitted on top of the plug ( my motor did not have these) or a current sensor fitted at the end of the busbar. A good glow plug has near zero resistance on the Ohm scale of the multimeter or your small test light should come on if you connect one end of it to the battery+ and the other to the glow plug tops in turn.

When I bought my troopie second hand back in '91 only one of the 6 plugs worked. No wonder she was reluctant to start on cold mornings ;-)

Klaus

Hey Willie

If it's either 6 or 8.5 V, would not the multi from the bus bar to earth give you the requisite voltage reading? Saves pulling the hooa apart.

Cheers ya old bastard.

a squirt bottle of that south african jungle juice will get her going every time :-))

I thought $12 was a bargain for glow plugs?

Hi Willem
When you have removed the busbar measure the resistance between the terminal and earth on the head along side the plug they should all be much the same. They do have a set resistance, some one with a manual should be able to help there. there is 2 maybe 3 different systems and they are all described in the W/S manual, one is fixed time , one temperature controled, the other is manual control.
The supply voltage on glow plugs need not be 6 or 8 volts as the power is shared by 6 glow plugs thus reducing voltage.
If you quote the chassis number Toyo should be able to tell you all the details you need , they have the info it is just a bit of a hassle getting it
Hope this is of some help
Ray

I just spoke to my mate who's an auto sparkie. He said to also check if it has a glow plug relay behind the glove box. The contacts get gunked up and this may be the cause. He advises to wait a little longer after the glow light has gone out, see if it makes any difference.

G'day Willem,

Trust all well with you. We had an '84 model up for about 9 years. Did replace a couple of glow plugs during that time and very vaguely remember them being 6.3 v.
I did as suggested above, took bus bar off and tested each with m/meter.

When replacing I used a very small of anti-seize on thread, but replaced the vehicle, before ever removing them again.

Am flying to William Creek early Sat morn(departing Longreach), for UHF Telemetry Field Day. Will be back in Birdsville that night, and dropped off here, on return trip. Was going to drive down, but it's a long way, when you can't afford the time to go.

Overcast here tonight, with a few spits of rain. Satmap looks good, maybe Ingrid is going to come to the party.

Regards,
Bob.

Hi Willem,

84 model is the "super glow" system and have about 4 seconds before the light goes out. The first 60 series had a 20 second glow.

With the superglow system, all current goes through the intake element before reaching glow plugs. This effectively reduces the voltage at the plugs to less than 7 volts. Each glow plug pulls about 10amps.

So when one glow plug fails, the voltage supplied to the other 5 plugs will increase; this causes the other plugs to fail, so they tend to all go out in sympathy!!

Just check that you have volatge at the plugs, which rules out a problem with the relay, then do as others suggest, remove the bar, and check each plug for continuity to earth. Any plugs that do not have continuity to earth are dead. Trying to measure the resistance of a glow plug is a waste of time because it is very very low.

Your choice whether you just replace the dead plugs or replace the lot. I'd be doing the latter as they are a relatively cheap item these days, and keep the old ones as spares.

Cheers
Phil