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TDI 101 Got a simple/basic TDI question? Are you a newbie (new to the forums). Feel free to post your question here.

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Old September 6th, 2005, 20:39   #1
Mark_J
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Default glow plug for coolant heating

There are supposed to be 3 glow plugs for coolant heating. I have searched in the repair manuals and haven't found anything relating to the location of these. I have a 1997 Passat and if someone knows where they are located I'd be very grateful.

Thanks,
Mark
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Old September 6th, 2005, 21:00   #2
whitedog
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Default glow plug for coolant heating



Just to the rear of the valve cover you can see the three connectors going down to them.
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Old September 6th, 2005, 21:06   #3
rdkern
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Default Re: glow plug for coolant heating

Looks like an A4 to me. I can't find anything in my Bentleys concerning the "coolant gps". I haven't seen anything in my engine compartment either. I'm also curious.
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Old September 6th, 2005, 21:09   #4
whitedog
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Default Re: glow plug for coolant heating

Quote:
Looks like an A4 to me. I can't find anything in my Bentleys concerning the "coolant gps". I haven't seen anything in my engine compartment either. I'm also curious.
A4, B3, C9, D432... I dunno. That's where they are located on other cars. Good luck.
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Old September 6th, 2005, 21:35   #5
compu_85
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Default Re: glow plug for coolant heating

I remember the A3/B4 guys had posted about them... but I can't find any pics of them on the pics server

-J
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Old September 7th, 2005, 16:40   #6
BKmetz
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Default glow plug for coolant heating


The coolant glow plugs on the A3/B4 TDIs are in an aluminum manifold on the back of the head facing the firewall. This is the same area as the A4 TDIs. They are hard to see because the intercooler plumbing is in the way.

The relay and fusible link for the coolant glow plugs are on the firewall next to the N-75 solenoid switchover valve. There is a clear plastic cover over the fusible link.
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Old September 8th, 2005, 12:28   #7
TDIBill
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Default glow plug for coolant heating

The coolant glow plugs are on the driver's end of the head just below the vacum pump location on an A4 motor.

TDIBill
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Old September 8th, 2005, 13:19   #8
cattlerepairman
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Default glow plug for coolant heating

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The coolant glow plugs are on the driver's end of the head just below the vacum pump location on an A4 motor.

TDIBill

...IF you happen to have manual transmission. The automatics do not have coolant glow plugs.
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Old September 8th, 2005, 18:42   #9
Joe_Meehan
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Default glow plug for coolant heating

Nice Photo. I am looking for the engine coolant temp sensor that might trigger a CEL code P0118 for Circuit High Input. It appears to be one of the two (of three) devices with plugs on them that are shown just below and to the left of #4 attached to the engine where the heater and radiator hoses attach. Is that correct, and if correct do you know which one.

Both of the ones toward the camera have checked out OK based on resistance readings at two different temperatures. Do you know if these three devices are not connected with a four prong connector in later cars (mine is a 2002 NB)?

Thanks anyone???
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Old September 8th, 2005, 19:18   #10
whitedog
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Default glow plug for coolant heating

those three are the coolant glowplugs. the temp sensor may be in that same housing, just pointed to the rear of the car.
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Old September 14th, 2005, 21:06   #11
Mark_J
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Default Re: glow plug for coolant heating

Found them on the drivers side of the head, clustered aroung where a coolant hose goes into the side of the head.

Tbanks every one,
Mark
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Old September 14th, 2005, 21:48   #12
compu_85
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Default Re: glow plug for coolant heating

Are your coolant plugs bad? Do these things actually wear out?

-J
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Old September 15th, 2005, 10:19   #13
jasonTDI
 
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Default Re: glow plug for coolant heating

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Are your coolant plugs bad? Do these things actually wear out?

-J
Yes the do wear out but it's real uncommon. I have replaced ONE single plug in a couple of years on all the TDI's I see.
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Old September 19th, 2005, 20:49   #14
Mark_J
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Default Re: glow plug for coolant heating

Found that they wern't bad. I removed the wires and cleaned the contacts and terminals, this seemed to fix my engine code issue.
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