Temp gauge barely rising now Winter. - Alfa Romeo Forum
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Temp gauge barely rising now Winter.

My temperature gauge has always been slow in getting up from Zero. But now that its winter I would rather like some heating.
Only in stationary traffic does it start to rise but once moving cools right back down to the pin again.
Does anyone have any suggestions as to the cause or have any fixes?

Ps: its a '99 156 2.5 Auto

Thanks in advance
 
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You probably need a new thermostat.
There is a guide on fitting. Part shouldnt cost more than £40.

There is a good chance the thermostat is stuck in the open position. Which means the engine is constantly run cold rather than in the close position untill the engine is at full temperture.

Also means the car uses more fuel.
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Originally Posted by scottyf View Post
You probably need a new thermostat.
There is a guide on fitting. Part shouldnt cost more than £40.

There is a good chance the thermostat is stuck in the open position. Which means the engine is constantly run cold rather than in the close position untill the engine is at full temperture.

Also means the car uses more fuel.
Mine's doing exactly the same. Ordered a new stat from Alfaworkshop.co.uk for £46.
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A trick to getting it to warm up faster is to blank some of the radiator off with cardboard.
This stops the cold air rushing forward and cooling the coolant down in the radiator.

Its an interim soloution though and makes your Alfa look a bit pants with cardboard stuffed down there.

Old Taxi drivers and car drivers in colder parts of the world used this trick.
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Def thermostat. easy job to do - good luck!
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Ha a quote from L&M Autos International in High Wycombe for £151 inc VAT to supply and fit. I've had a big service from them before and trust them.
 
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£151 - You should tell them to go jump.
Another reason I do my own work.

Shouldnt cost more than half that.
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Can I butt in and ask what the running temp should be, I many have a similar issue?
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Operating temp should be around 90° C.
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Thanks sdato, I do have a problem then
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After 8 minutes of constant tick over it should reach 80 degrees easily or 5 miles of constant driving from cold. 7 miles in extreme cold conditions
It should settle at 85 degrees when in constant motion above 30 mph and should reach 92 degrees below that speed or in traffic conditions like traffic lights etc. At this point you will hear the fans kick in and the temperature gauge return to 85 soon afterwards.
V6 Busso's tend to run hot in all conditions.

Changing the Thermostat is one of the easiest jobs to DIY and pays for itself within a matter of a few weeks with the fuel economy savings, otherwise you are loosing money hand over fist for nothing.
1.Remove air induction tube
2. Remove the top coolant hose from the housing... A blunt flat screw driver helps to break the seal between the metal and rubber, spray a little lubricant between the two to aid removal and have a large funnel with a pipe to a bucket to catch the excess coolant.
3.Remove the three retaining bolts from the thermostat housing
4.Remove the old thermostat, it may be sticky so use the flat blade screwdriver to pry it Now use a stanley knife blade to clean off the old paper gasket from the bottom surface of the housing.
4. Make sure that you get a new paper gasket comes with the new thermostat (some don't)
fit the new gasket and fit the thermostat and re tighten the bolts.
5. Refit the hose and tighten the clip.. Now top up the expansion tank with fresh coolant and start the engine leaving the filler cap off for now.
6. Turn your interior heater to hot. Wait until the engine is warm and the coolant fan has operated twice. Now open the plastic screw on the driver's side of the top radiator to bleed any air in the system until it flows steady (quite a few turns until its nearly out).
7. Re-tighten the bleed screw and top up the coolant to correct level and now replace the filler cap...
8. Job done... have a cuppa and be proud of your work
 
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Quote:
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Operating temp should be around 90° C.
Yep, even at speed with outside temperatures below freezing.
If not, you need a new thermostat.

That is for Petrol engines (Diesels produce less waste heat, which is why they have auxiliary heaters in cold climates!)
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Yep, even at speed with outside temperatures below freezing.
If not, you need a new thermostat.

That is for Petrol engines (Diesels produce less waste heat, which is why they have auxiliary heaters in cold climates!)
Ahhhh. Sorry to the OP for hijacking btw. Mine runs at 50ish and is Diesel.
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for a diesel should be +80 degrees after the same run in period
 
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Quote:
Originally Posted by scottyf View Post
A trick to getting it to warm up faster is to blank some of the radiator off with cardboard.
This stops the cold air rushing forward and cooling the coolant down in the radiator.

Its an interim soloution though and makes your Alfa look a bit pants with cardboard stuffed down there.

Old Taxi drivers and car drivers in colder parts of the world used this trick.

A friend of mine had a Volvo Amazon a few years ago that had a retractable fabric roller blind over the front of the radiator, controlled by a chain running through a tube to the dashboard.
It was certainly useful, and so neatly done it looked as though it may have been a factory option...though my knowledge of old Volvos is not that extensive!
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You can get a grill blind on certain models of new ford
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You can get a grill blind on certain models of new ford
Yeah... good idea... But wait until start you see Fords littering the country because they overheated when the closing grill system doesn't open

Met police asked VOSA/ ROSPA to investigate the safety of the automatic reverse parking systems on the new Focus after three failures already that resulted in one person being crushed between cars
Ford, innovative..... But reliability?
I used to be a Ford technician many years ago, they still haven't got it right!
 
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You can get a grill blind on certain models of new ford
More for the aero benefit than for temperature control (the thermostat is for temperature control!).
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I'll get a new thermostat, in the meantime a dumb question. It won't harm the engine running cooler than it should, just use more fuel, right?
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Quote:
Originally Posted by Grahameo View Post
for a diesel should be +80 degrees after the same run in period
depends if heater on high
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Quote:
Originally Posted by Grahameo View Post
After 8 minutes of constant tick over it should reach 80 degrees easily or 5 miles of constant driving from cold. 7 miles in extreme cold conditions
It should settle at 85 degrees when in constant motion above 30 mph and should reach 92 degrees below that speed or in traffic conditions like traffic lights etc. At this point you will hear the fans kick in and the temperature gauge return to 85 soon afterwards.
V6 Busso's tend to run hot in all conditions.

Changing the Thermostat is one of the easiest jobs to DIY and pays for itself within a matter of a few weeks with the fuel economy savings, otherwise you are loosing money hand over fist for nothing.
1.Remove air induction tube
2. Remove the top coolant hose from the housing... A blunt flat screw driver helps to break the seal between the metal and rubber, spray a little lubricant between the two to aid removal and have a large funnel with a pipe to a bucket to catch the excess coolant.
3.Remove the three retaining bolts from the thermostat housing
4.Remove the old thermostat, it may be sticky so use the flat blade screwdriver to pry it Now use a stanley knife blade to clean off the old paper gasket from the bottom surface of the housing.
4. Make sure that you get a new paper gasket comes with the new thermostat (some don't)
fit the new gasket and fit the thermostat and re tighten the bolts.
5. Refit the hose and tighten the clip.. Now top up the expansion tank with fresh coolant and start the engine leaving the filler cap off for now.
6. Turn your interior heater to hot. Wait until the engine is warm and the coolant fan has operated twice. Now open the plastic screw on the driver's side of the top radiator to bleed any air in the system until it flows steady (quite a few turns until its nearly out).
7. Re-tighten the bleed screw and top up the coolant to correct level and now replace the filler cap...
8. Job done... have a cuppa and be proud of your work
https://www.alfaowner.com/Forum/engin...twinspark.html
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I'll get a new thermostat, in the meantime a dumb question. It won't harm the engine running cooler than it should, just use more fuel, right?
Running too rich will muck your engine and plugs up and potentially kill ur cats if you leave it unchecked.

Worst case would be unburnt fuel making to your cats, causing it to burn in them.. you'd know if you check at night, they glow red hot if thats happening.

For an hours work, and 40 pounds just get it done.
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Quote:
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£151 - You should tell them to go jump.
Another reason I do my own work.

Shouldnt cost more than half that.
I had 3 quotes and they were all around £150 my stat is covered under my warranty, but they refused to pay out for it at those prices (I think their autodata says its a 60min job and the garages were quoting for 2 hrs). So I'm doing it myself.
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DIY is a cinch - lots of advice in the link posted previously.

Ridiculous to pay £150. 2 hours for a mechanic is a joke.
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