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Joined: Oct 2002
Posts: 64
CEG\'er
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OP
CEG\'er
Joined: Oct 2002
Posts: 64 |
The temp guage on my 1998 Merc Mystique Zetec keeps dropping down and coming back up to normal operating temp. I've had the thermostat changed, so that's not the problem. I was told that it's probably a bad sending unit. My question is, which sensor is the one to the temp guage on the dash? There's one on the top of the thermostat housing and one under it. If someone would happen to have the part number, I'd appreciate that as well. Thanks everyone! 
'98 Mystique Zetec w/ auto trans
103,900 miles
Kenwood KDC-MPV7017 CD/MP3 HU
Kenwood KFC-6889ie 6x8" 3-way speakers
'96 Mystique Zetec ATX
108,000 miles
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Joined: Apr 2003
Posts: 1,085
Hard-core CEG\'er
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Hard-core CEG\'er
Joined: Apr 2003
Posts: 1,085 |
Bottom one = to gauge
top one = to computer
Change thermostats to 180* F
2012 Lotus Evora
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95 Mystique MTX - GONE 395,000 Kms
--------- Both Zetecs
'97 Contour Mtx - stock - GONE
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Joined: Mar 2002
Posts: 2,319
Hard-core CEG'er
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Hard-core CEG'er
Joined: Mar 2002
Posts: 2,319 |
If by "dropping down" you mean all the way to cold, then check for loose electrical connection at the sender unit first.
98 Mystique LS v6 atx 163,000km
97 Contour LX v6 atx 163,000km
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Joined: Aug 2003
Posts: 31
New CEG\'er
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New CEG\'er
Joined: Aug 2003
Posts: 31 |
Had the exact same problem on mine. It's the one underneath the thermostat that's bad.
Mark, Contour GL 2,0 ATX, -98
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Joined: Oct 2002
Posts: 64
CEG\'er
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OP
CEG\'er
Joined: Oct 2002
Posts: 64 |
Hey, thanks for the info, guys. Now does anyone have any tips for getting at that sensor. It's not in the easiest place to get to. Will everything have to come out to get to it?
'98 Mystique Zetec w/ auto trans
103,900 miles
Kenwood KDC-MPV7017 CD/MP3 HU
Kenwood KFC-6889ie 6x8" 3-way speakers
'96 Mystique Zetec ATX
108,000 miles
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Joined: Apr 2003
Posts: 1,085
Hard-core CEG\'er
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Hard-core CEG\'er
Joined: Apr 2003
Posts: 1,085 |
Originally posted by lekmedm:
Hey, thanks for the info, guys.
Now does anyone have any tips for getting at that sensor. It's not in the easiest place to get to. Will everything have to come out to get to it?
Resonater , thermostat , hose , anti freeze - under two hours from opening the hood to washing your hands.....
2012 Lotus Evora
---------
95 Mystique MTX - GONE 395,000 Kms
--------- Both Zetecs
'97 Contour Mtx - stock - GONE
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Joined: Oct 2002
Posts: 64
CEG\'er
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OP
CEG\'er
Joined: Oct 2002
Posts: 64 |
Aw, nuts... I just had the thermostat replaced.  If I do this myself, how much coolant (and mess) can I expect to come gushing out of there? I'd like to make this as quick and painless as possible.
'98 Mystique Zetec w/ auto trans
103,900 miles
Kenwood KDC-MPV7017 CD/MP3 HU
Kenwood KFC-6889ie 6x8" 3-way speakers
'96 Mystique Zetec ATX
108,000 miles
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Joined: Aug 2003
Posts: 31
New CEG\'er
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New CEG\'er
Joined: Aug 2003
Posts: 31 |
I wouldn't do it myselfe. It's not expencive to fix it, and they will do it right.
Mark, Contour GL 2,0 ATX, -98
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Joined: Feb 2003
Posts: 1,012
Hard-core CEG\'er
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Hard-core CEG\'er
Joined: Feb 2003
Posts: 1,012 |
Originally posted by lekmedm:
Aw, nuts... I just had the thermostat replaced.
If I do this myself, how much coolant (and mess) can I expect to come gushing out of there? I'd like to make this as quick and painless as possible.
I don't know how different is on the zetec...But I just did mine on the SVT and I only lost a minimal amount of fluid. As long as you get the new one in under 30 seconds you should be fine...Good luck.
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