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Passat Overheat Again!!!
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CarGuru > Volkswagen > Passat Overheat Again!!! 20 March 2005 20:03:49

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Passat Overheat Again!!!

Dogwud 19 March 2005 17:44:28
 How long does it take for an engine to cool down???
If you scroll down the Topic list, you'll see the saga of my overheating
Passat. The dealer could find nothing wrong, and since then I drove it
three days without a problem. Until tonight. The thermostat needle
pegged to the right and the display said STOP after only 20 miles. Once
again, it has plenty of coolant in it. After 30 minutes off, it went from
240 degrees to about 200, so i drove ten miles until it pegged again.
Waiting an hour with the hood up, the thermometer hardly moved.
Shouldn't
the engine cool quite a bit after an hour? It makes me think it's
thermostat failure.


Add comment
Joseph Meehan 19 March 2005 19:59:51 permanent link ]
 dogwud wrote:> How long does it take for an engine to cool down???> If you scroll down the Topic list, you'll see the saga of my> overheating Passat. The dealer could find nothing wrong, and since> then I drove it three days without a problem. Until tonight. The> thermostat needle pegged to the right and the display said STOP after> only 20 miles. Once again, it has plenty of coolant in it. After 30> minutes off, it went from 240 degrees to about 200, so i drove ten> miles until it pegged again. Waiting an hour with the hood up, the> thermometer hardly moved. Shouldn't> the engine cool quite a bit after an hour? It makes me think it's> thermostat failure.

I suspect you may find it interesting to replace the temperature sensor
or better yet add a external temperature sensor. Have you had any
indication other than the dash indicator that it is really overheating?

--
Joseph Meehan

26 + 6 = 1 It's Irish Math


Add comment
Woodchuck 19 March 2005 20:55:06 permanent link ]
 A little more insight on your issue. This week we had 2 V6 Passats with
overheat issues.

1- was waterpump
2- was ECT(engine coolant temperature sensor)


1- so since the dealer didn't replace the waterpump while doing the timing
belt replacement... well you already know my 2 cents. The one we did with
t-belt, water pump, tension roller totaled about $900 and our labor rate is
$75 per hour.


2- The other Passat was the ECT. What had happened on this car is coolant
leaks out of the sensor onto the contacts in the connector. This intern
altered the resistance and cause the temperature gauge to read way to high.
In reality the engine wasn't really overheating at all. This can be checked
by removing the connector plug and looking for coolant present.

MY moneys on the ECT!

"dogwud" <dogwud17557@yahoo.­com> wrote in message
news:a0c56cf47319d9­562dd8f294fb70732f@l­ocalhost.talkaboutau­tos.com...> How long does it take for an engine to cool down???> If you scroll down the Topic list, you'll see the saga of my overheating> Passat. The dealer could find nothing wrong, and since then I drove it> three days without a problem. Until tonight. The thermostat needle> pegged to the right and the display said STOP after only 20 miles. Once> again, it has plenty of coolant in it. After 30 minutes off, it went from> 240 degrees to about 200, so i drove ten miles until it pegged again.> Waiting an hour with the hood up, the thermometer hardly moved.> Shouldn't> the engine cool quite a bit after an hour? It makes me think it's> thermostat failure.>


Add comment
MikeK 20 March 2005 20:03:49 permanent link ]
 "dogwud" <dogwud17557@yahoo.­com> wrote in
news:a0c56cf47319d9­562dd8f294fb70732f@l­ocalhost.talkaboutau­tos.com:
How long does it take for an engine to cool down???> If you scroll down the Topic list, you'll see the saga of my> overheating Passat. The dealer could find nothing wrong, and since> then I drove it three days without a problem. Until tonight. The> thermostat needle pegged to the right and the display said STOP after> only 20 miles. Once again, it has plenty of coolant in it. After 30> minutes off, it went from 240 degrees to about 200, so i drove ten> miles until it pegged again. Waiting an hour with the hood up, the> thermometer hardly moved. Shouldn't> the engine cool quite a bit after an hour? It makes me think it's> thermostat failure.>

When the temp pegs and you stop the car and pop the hood, what's
happening to the coolant in the reservoir? When this happened to me (and
it happened all at once and was NOT intermittent), the fluid in the
reservoir was bubbling. That's an indication that it's really
overheating.<g>

If your gauge pegs and therre's no visible indication of a hot engine,
it could be a false alarm like Woodchuck indicates.
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CarGuru > Volkswagen > Passat Overheat Again!!! 20 March 2005 20:03:49

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