V40 Overcooling

log man · Dec 11th, 2011, 23:14

Hi, We have a Volvo V40 1.8 petrol 2001, with an overcooling problem. Tested thermostat which seems to be working ok. Any suggestions as to what I should look for next?

log man · Dec 11th, 2011, 23:41

Bit more info...

It only seems to get to the normal running temp & rpm when it is left to tick over (temp half way, 750rpm).

But.. on start up and whilst driving the idel is up at about 1100rpm and the temp gauge is down to only 2 lines up.

Any advice would be a great help!

stevo48 · Dec 12th, 2011, 00:00

Replace the thermostat as that is almost guaranteed to be the problem and at £5ish its a cheap fix.

SIAMBLUE · Dec 12th, 2011, 00:17

It could be a faulty temp sensor, did you take it out and check it over when you had the stat out?

Gary.

log man · Dec 12th, 2011, 10:17

temp sencer ok thermostat ok could it be ecu ?

stevo48 · Dec 12th, 2011, 15:55

Quote:

Originally Posted by log man

Hi, We have a Volvo V40 1.8 petrol 2001, with an overcooling problem. Tested thermostat which seems to be working ok. Any suggestions as to what I should look for next?

How did you test it?
If you used the hot water method it is not conclusive proof that the stat is ok.

kebab10 · Dec 12th, 2011, 18:57

As stated before just change the thermostat. Not a big job and cheap to boot. And, you will find that this forum sectiion is for the newer S40 and V50 and others as well. The V40 section is just a tad above this one. In there you will find how to change the stat and lots of other info. Okay.

log man · Dec 12th, 2011, 20:52

I have replaced with new thermostat and temp sensor, but still same fault...

stevo48 · Dec 12th, 2011, 21:42

Is the electric radiator cooling fan staying on or are you perhaps just getting a faulty reading from the temperature guage?

Dec 11th, 2011, 23:14	#1
log man ANDY Last Online: Dec 12th, 2011 22:33 Join Date: Feb 2011 Location: wiltshire	V40 Overcooling Hi, We have a Volvo V40 1.8 petrol 2001, with an overcooling problem. Tested thermostat which seems to be working ok. Any suggestions as to what I should look for next?

Dec 11th, 2011, 23:41	#2
log man ANDY Last Online: Dec 12th, 2011 22:33 Join Date: Feb 2011 Location: wiltshire	V40 Overcooling Bit more info... It only seems to get to the normal running temp & rpm when it is left to tick over (temp half way, 750rpm). But.. on start up and whilst driving the idel is up at about 1100rpm and the temp gauge is down to only 2 lines up. Any advice would be a great help!

Dec 12th, 2011, 00:17	#4
SIAMBLUE Premier Member Last Online: May 24th, 2024 01:16 Join Date: Dec 2003 Location: Ilford, Essex. View Photos By: SIAMBLUE	It could be a faulty temp sensor, did you take it out and check it over when you had the stat out? Gary. __________________ V70 P2 facelift D5 6sp manual E4 Sport SE Ocean Race Blue pearl (2005) 97k, standard.

Dec 12th, 2011, 10:17	#5
log man ANDY Last Online: Dec 12th, 2011 22:33 Join Date: Feb 2011 Location: wiltshire	over cooling? temp sencer ok thermostat ok could it be ecu ?

Dec 12th, 2011, 20:52	#8
log man ANDY Last Online: Dec 12th, 2011 22:33 Join Date: Feb 2011 Location: wiltshire	V40 Overcooling I have replaced with new thermostat and temp sensor, but still same fault...

Dec 12th, 2011, 00:00	#3
stevo48 Premier Member Last Online: Jul 9th, 2020 20:08 Join Date: Dec 2007 Location: Halifax West yorkshire	Replace the thermostat as that is almost guaranteed to be the problem and at £5ish its a cheap fix.

Dec 12th, 2011, 18:57	#7
kebab10 Premier Member Last Online: Jul 24th, 2015 16:09 Join Date: Sep 2008 Location: oxford	As stated before just change the thermostat. Not a big job and cheap to boot. And, you will find that this forum sectiion is for the newer S40 and V50 and others as well. The V40 section is just a tad above this one. In there you will find how to change the stat and lots of other info. Okay.

Dec 12th, 2011, 21:42	#9
stevo48 Premier Member Last Online: Jul 9th, 2020 20:08 Join Date: Dec 2007 Location: Halifax West yorkshire	Is the electric radiator cooling fan staying on or are you perhaps just getting a faulty reading from the temperature guage?

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