From: Michael Howell, DO (michael@tsixroads.com)
Date: Sat Oct 16 2004 - 21:54:47 PDT
I was going through old email because I need to replace some of my glow
plugs. I was wondering what you thought of the snap on tool when it
came in? How did you get the rest of the plugs out?
Mike
Tishomingo, MS
M1010
M1009
Ron wrote:
> ALL my glow plugs are toast due to a failed glow plug relay. The relay
>was an aftermarket type, rated for 12 VDC. It could not handle 15, or maybe
>18 VDC and cooked in the ON mode.
> Food for thought. When you have a glow plug that fails, the voltage
>available to the other 7 goes up by 1/8 or 1.5 volts. So with 8 working
>plugs getting 12 volts, an 8 second pre heat with a manual push button works
>fine. But loose one and the other 7 are now seeing 13.5 and that 8 second
>pre heat is too much, so another one fails. Now the other 6 are seeing 15
>volts, so 6 seconds are deadly, so another one fails and we repeat the
>sequence, etc., etc, etc. So what is cheaper, a new glow plug controller
>card that SENSES the preheat temperature and cycles the remaining plugs with
>in limits, or spending a couple of hundred dollars on tools and a bunch of
>hours disassembling the truck and cursing the designers and GM and anyone
>else involved in the piss poor design of this system because the system was
>bypassed with a manual push button? Maybe if you use the push button method,
>you should install an indicator light hooked onto the glow plug side of the
>relay to tell you your glow plugs are cooking after you release the push
>button cause the relay has failed in the "ON" mode and it's already too late
>to save the plugs AND a voltmeter so you can tell when you have cooked a
>plug cause of an extra chipmunk or two.
>
> Meanwhile, back at the engine compartment...
>
> Anyone used the Owens Export glow plug removal tool and have any
>opinions?
>
> How about the Snap On glow plug socket for the 6.2l?
>
> TOOL REVIEW:
> After playing with the OTC 6005 GPR Tool today, I can say it is a clever
>idea if your mushroomed glow plugs are in an engine that is out of the
>truck, mounted on an engine stand with the exhaust manifolds removed. If
>not, you can pass on it.
> A tool that worked pretty good on 3 mushroomed plugs was a GM door trim
>removal tool. It looks like a big tack puller and fit below the threaded
>section of the head of the glow plug and over the shaft of the glow plug
>once the threads cleared the block. Using an air ratchet and 3/8 deep socket
>my friend was able to apply leverage against the plug while spinning it and
>the damaged plugs slowly 'screwed' themselves out.
> The other 5 will have to await the arrival of the Owens and Snap On
>tools.
> Anyone got any other methods, short of C4, that have worked?
>
>
>
>
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