Volvo Community Forum. The Forums of the Volvo Owners Club

Forum Rules Volvo Owners Club About VOC Volvo Gallery Links Volvo History Volvo Press
Go Back   Volvo Owners Club Forum > "Technical Topics" > 700/900 Series General

Notices

700/900 Series General Forum for the Volvo 740, 760, 780, 940, 960 & S/V90 cars

Information
  • VOC Members: There is no login facility using your VOC membership number or the details from page 3 of the club magazine. You need to register in the normal way
  • AOL Customers: Make sure you check the 'Remember me' check box otherwise the AOL system may log you out during the session. This is a known issue with AOL.
  • AOL, Yahoo and Plus.net users. Forum owners such as us are finding that AOL, Yahoo and Plus.net are blocking a lot of email generated from forums. This may mean your registration activation and other emails will not get to you, or they may appear in your spam mailbox

Thread Informations

940 separate temperature gauge

Views : 1759

Replies : 28

Users Viewing This Thread :  

Reply
 
Thread Tools Display Modes
Old Jan 27th, 2019, 21:39   #1
jpliddy
VOC Member
 

Last Online: Feb 15th, 2024 18:04
Join Date: Dec 2006
Location: stoke on trent
Default 940 separate temperature gauge

hi has any one fitted a independent/seperate temperature gauge to a 940 ?
jpliddy is offline   Reply With Quote
The Following User Says Thank You to jpliddy For This Useful Post:
Old Jan 28th, 2019, 01:10   #2
Laird Scooby
Premier Member
 
Laird Scooby's Avatar
 

Last Online: Today 02:08
Join Date: May 2012
Location: Lakenheath
Default

Quote:
Originally Posted by jpliddy View Post
hi has any one fitted a independent/seperate temperature gauge to a 940 ?
Jim - in the interest of understanding what you're asking, why would you want to fit a separate independent temperature gauge? What temperature are you looking to measure - engine or outside air?
__________________
Cheers
Dave

Next Door to Top-Gun with a Honda CR-V & S Type Jag Volvo gone but not forgotten........
Laird Scooby is offline   Reply With Quote
Old Jan 28th, 2019, 08:41   #3
jpliddy
VOC Member
 

Last Online: Feb 15th, 2024 18:04
Join Date: Dec 2006
Location: stoke on trent
Default jpliddy

Hi dave it's too keep an eye on the coolant temperature I've never been able to fix mine so thought if it's not a big job just fit another coolant gauge useing existing temperature sensor at front of engine on my 940 diesel
If it's possible?
jpliddy is offline   Reply With Quote
The Following User Says Thank You to jpliddy For This Useful Post:
Old Jan 28th, 2019, 08:54   #4
Laird Scooby
Premier Member
 
Laird Scooby's Avatar
 

Last Online: Today 02:08
Join Date: May 2012
Location: Lakenheath
Default

Quote:
Originally Posted by jpliddy View Post
Hi dave it's too keep an eye on the coolant temperature I've never been able to fix mine so thought if it's not a big job just fit another coolant gauge useing existing temperature sensor at front of engine on my 940 diesel
If it's possible?
It's possible Jim but most aftermarket gauges need their own sender units/temperature sensors to function correctly.

What's actually wrong with your current temperature gauge? Have you investigated the sensor/sender unit? Have you tested the gauge itself works? Is your engine just running cold because it needs a new thermostat maybe?

Diesels are well known for taking a long time to warm up and even when being driven, unless they're driven hard, often dont get up to full working temperature which means they never get to their full efficiency.

Does the existing temp gauge move at all?
__________________
Cheers
Dave

Next Door to Top-Gun with a Honda CR-V & S Type Jag Volvo gone but not forgotten........
Laird Scooby is offline   Reply With Quote
Old Jan 28th, 2019, 19:10   #5
jpliddy
VOC Member
 

Last Online: Feb 15th, 2024 18:04
Join Date: Dec 2006
Location: stoke on trent
Default jp liddy

hi dave
ive had problems with the thermostat gauge for years it it just reads zero a lot then will kick into life and go to 10 o clock then back again i have swopped the gauge . had joints soldiered if i unplug the sensor at the front of the engine it still reads 10 0 clock then back to zero so i gave up but do you have a thought what might fix it it used to sit at 12 o clock when working fine years ago
regards jim i have a spare header tank with the float in the bottom but no wiring for it .
jpliddy is offline   Reply With Quote
Old Jan 28th, 2019, 19:40   #6
Laird Scooby
Premier Member
 
Laird Scooby's Avatar
 

Last Online: Today 02:08
Join Date: May 2012
Location: Lakenheath
Default

It sounds like the fuel gauge in my 760 Jim - all the work ethics of a 1970s coal miner!

First thing to do is to ascertain exactly what the gauge is doing in relation to engine temperature.

https://www.ebay.co.uk/itm/Temperatu...O/392187836370

If you invest in one of those, take the car for a 5-10 mile drive at a decent sort of speed, stop somewhere safe and leave the engine running, pop the bonnet and aim that at the thermostat housing (usually where the top hose joins the engine) and read the temperature, it should be in the high 80s, preferably about 88C give or take a few degrees. If it is reading 88C ish then by rights the temp gauge should be at the 12 o'clock position.

If not, there's a very high chance your thermostat needs renewing. You can also use that device to check for hot or cold spots on your radiator, wheel berings, brakes and so on and many uses around the home too - it's invaluable for balancing a central heating system for example.

One thought - nobody has decided to wind PTFE tape around the temp gauge sender/sensor threads have they? If so, that will cause problems, had that on mine (except it was the EFi sensor they'd done it to! ) and it causes the circuit to break, leaks round the sensor and so on.
__________________
Cheers
Dave

Next Door to Top-Gun with a Honda CR-V & S Type Jag Volvo gone but not forgotten........
Laird Scooby is offline   Reply With Quote
Old Jan 28th, 2019, 20:49   #7
jor
VOC 20573
 
jor's Avatar
 

Last Online: Jul 10th, 2023 23:14
Join Date: Mar 2007
Location: wembley
Default

Jim,

You are certainly right to worry about coolant, as if something goes wrong the head is finished..
As no doubt you have seen from many posts the symptoms you describe are from the joints in the pcb, diagnosed in my car by thumping the dash, which results in a temporary cure. Although several posts recommend the solder method, none actually point to which are the joints to solder - should anybody know please say!
If you cannot get the gauge to work, all you can do is try to minimize the possibility of coolant loss. If the hoses have never been changed perhaps now is the time if you can find them (I think that volvo have stopped making them) - ebay does have 350655861205, but that's for the 760 and I don't know whether or not the measurements are the same.
In which case all that's left is the admittedly expensive method of using evans waterless coolant, which boils at 375 degrees, so the pressure in your system won't exceed atmospheric. Besides the cost of the stuff itself you are supposed to ensure that all the water is removed by using some kind of flush.
Another precaution taken by some was to get an 850 coolant reservoir, which has a coolant level sender, so if you know somebody who knows how to connect it you can be warned of loss.
BTW I could not find the brake pad tool so do not even know if it is volvo or not...

jor
__________________
Volvo 940 SE 1994 D24Tic.
BMW C1 85 mpg
jor is offline   Reply With Quote
Old Jan 28th, 2019, 21:04   #8
Laird Scooby
Premier Member
 
Laird Scooby's Avatar
 

Last Online: Today 02:08
Join Date: May 2012
Location: Lakenheath
Default

Quote:
Originally Posted by jor View Post
BTW I could not find the brake pad tool so do not even know if it is volvo or not...

jor
I think that was Tofufi aka Jim that linked to the brake pad wind-back tool on the other thread?
__________________
Cheers
Dave

Next Door to Top-Gun with a Honda CR-V & S Type Jag Volvo gone but not forgotten........
Laird Scooby is offline   Reply With Quote
Old Jan 28th, 2019, 22:50   #9
baggy798
🤍💙💗
 
baggy798's Avatar
 

Last Online: Yesterday 19:35
Join Date: Mar 2006
Location: Lichfield
Default

Yeah, I have. It required extensive modification of the cluster but I wanted it to look OEM as possible.



Installing one elsewhere would be a lot easier (like in the bottom left of the pic behind the indicator stalk).

Don't know the thread diameter for the D24 sender but adapters are available.

Should be able to tap into the stock gauge wiring (positive, negative, and sender signal wire).
__________________
MY97 940 CD LPT Super Sports Edition 2 Turbo, Midnight Purple, 174,000 miles.
baggy798 is offline   Reply With Quote
Old Jan 28th, 2019, 23:48   #10
jpliddy
VOC Member
 

Last Online: Feb 15th, 2024 18:04
Join Date: Dec 2006
Location: stoke on trent
Default

Thanks for your thoughts everybody hi baggy your gauge looks good did you have a faulty gauge im thinking its not the gauge itself as I've changed it. But is there more complex things ive got to do to fix my problem
jpliddy is offline   Reply With Quote
Reply


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT +1. The time now is 09:29.


Powered by vBulletin
Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.