All looks good to me :thumbs:

 

take in account that the temp gauges of many 156's give false readings, 70+ on the meter means 80+ measured with Alfadiag. If the meter stays on 60- than you have a knackered stat for sure..
Many members changed stats only to see that the temp still stays at 70+....

 

fair does +1:thumbs: i appreciate your input,they still be able to do basic test of thermostat regardless of their reading on gauge ,if hose stays cold then heats up after say ten mins ,it could show to a point how accurate their gauge is maybe

 

And just because someone has replaced one within the last year or so doesnt mean its not gone again, i changed mine less than a year ago and have just had to change it again this week due to it taking ages to warm up and never going above 60 now its up to 90 within a few miles and im not freezing on my short trip to work, gave the not so old one a bit of a looking at after i cut open the housing and its stuck half open, this one by the way was an expensive one from a well known supplier, the new one was a cheaper one from the local parts place so only time will tell if it lasts any longer (only car in the 30 or so ive owned that ive ever had to change the stat twice)

 

+1 replaced "summer" stat ( could see daylight through old one when removed:wow with new Alfa one, it was DOA temperature never got above 70 in GTV. even in heavy traffic. New one perfect after 6 months:thumbs:

 

forgot to quote spuds message
i think that is typical of diagnosis on most sites regards any component ie maf sensors prime culprit ,because it was last replaced say last julember :cheese:it doesnt need to be looked at again
hopefully in this instance a basic check should waggle that important finger in the correct direction

 

I changed stat before few months. Bt temp is 70-75. Winter heater is good, I think. What you think, gauge is maybe ?

 

just do basic check and see if thermostat is working correctly,and to just check gauge.... when hose starts getting warm should indicate on gauge approximately 90c,so could give an indication how accurate your gauge is:thumbs:

 

Don't forget to check the Jiggle pin? Do thermostats still have these?

 

Not looked at one recently, but I don't think they have them any more.

 

Isn't the sensor available seperately for about a fiver? Was gonna change my t/stat (£80+) then found the sensor for a fiver, and thought I'd try that. Still done nothing about it though, been busy poly bushing.

 

sensor on stat has nothing to do with the basic function of a thermostat


the sensors purpose is to measure temperature and relay it to ecu,regardless then a output is sent to gauge


if you follow the basic test of the thread it will give you an idea you either need or dont need a new thermostat:thumbs:

 

Will give it a go..possibly tomorrow...just wondering how long I think is is acceptable before I slink towards the car on valentines day.

 

think youll be treading on thin ice there so straight after breaky:cheese:

 

It means will be better to change stat sensor? Cos I changed only stat

 

not really if sensor is cheap enough yeah by all means but doesnt make you gauge accurate though ,alfa gauges( temp gauges) are known to be not the most accurate

 

I agree with the diagnosis on here ... but for me Step 1 is ALWAYS to plug it into the diagnostics and check what temp the ECU thinks the car is running at ... quick and easy (and 100% accurate :thumbs

 

wont tell ya thermostat is duff tho only the gauge is reading wrong:thumbs:

 

with regard to overheating, my GT V6 overheated for the first time yesterday, whilst under normal driving the temp read 90, but every time I gave it the beans the gauge shot up ( I obviously eased off) then when on over run downhill it cooled back down. I stopped, opened the bonnet to find the radiator fans were running as normal, , oil was fine, plenty of water in the header tank, (a bit rusty coloured) but the top of the engine and the exhaust manifold were cold. Tell me its something simple like the thermostat !! Only serviced last week

 

water pump ,not sure but have these plastic impellor on,as this could be your problem

just do basic check for your thermostat to check on that,
thermostat check is not part of the service and is more often overlooked

 

Often the cause of failed stat's especially new ones is little or no antifreeze/coolant or just water in the system, coolant is a corrosion inhibitor also...

 

Now I've had mine down to a guy who's plugged it in since my gauge barely comes to 60. He has said the stat is opening and shutting as it should be and did an emmisions test to check it wasn't overfueling. He has said it is the sensor that feeds the gauge reading. He is an Alfa specialist, but wanted £110 parts and £75 labour since he said the stat should be changed at the same time. Now first which sensor is this that needs to be changed? Any pics if possible? And do you think i'm just getting milked for the extra. I know I can get the sensors at about £13 each trade. Just dont know which one I need.

 

if he was alfa specialist i would have assumed he would have plugged in to ecu and said if gauge was accurate or not to sensor
gauges are notorius inaccurate but if you check your stat your self with the check described at bigginning of this thread you shouldnt go wrong:thumbs:

 

Did the "check" with mine. Remains cold until gets up to temp.

Takes 2 miles to get 90, then when stat opens, drops to 70 (indicated on gauge). After a few minutes of driving, goes up to 90 and the loop begins again.

Getting 280 to the tank of town driving Defo exhaust has a hole somewhere so maybe that is affecting mileage rather than stat???

 

the kangorooing is not right ... sounds like the stat is a bit sticky

mpg: my 1.6 is appaulingly bad,
280 to the tank, but too much town driving.
380 with 80% motorway miles.
a friend gets 400+ everytime!!! makes me mad! he does 50% motorway miles!

oh, my stat works apparently, kangarooing dial, between 70 and 90 but last few months its been 60-80...?

... sounds like it was a bit sticky ... now it's stuck ...

 

Just went down the road and got the parts £55 for the lot.
As for mileage...I got 380 from my last tank round town. Only the baby 1600 though.

 

mpg: my 1.6 is appaulingly bad,
280 to the tank, but too much town driving.
380 with 80% motorway miles.
a friend gets 400+ everytime!!! makes me mad! he does 50% motorway miles!

oh, my stat works apparently, kangarooing dial, between 70 and 90 but last few months its been 60-80...?

 

Remember as well that if you have an oilburner it will take longer to warm up than a petrol.

 

Now im just a little lost. Today the gauge finally came off of 60. All the way upto 100 in traffic then dropped down to 70 again when I got moving. And back upto 90 just as soon as the traffic got slow again. Not fitted the parts yet. Now shall I just carry on and fit a new stat and sender or is it possible its just magically fixed itself?

 

have you done basic thermostat check at beginning of this thread

 

Yeah did the check yesterday and the pipe seemed to be getting warm pretty quickly. But maybe not. Will try from cold tonight again. Its just puzzling me a little now. Unless it is just sticking in there occasionally? But then it doesn't explain the engine finally getting warm today after about 600 miles of driving so far.

 

if top pipe was getting warm quickly it means your thermostat is passing and NEEDS replacing:thumbs:

 

Thats the difference between hot and warmish. worked for me and my 22 years of being a mechanic

 

My 2c it looks like a dodgy stat, cheap and easy "fix" do this and see if it solves the problem.Then if it doesn't solve the problem tackle the more complex stuff. Good luck:thumbs:

 

I think my stat is dead. Takes forever to get up to 70 then drops back down quickly. Fuel economy is awful at the moment. Would this mean the stat needs replacing? Would that fix the fuel economy?

 

just do basic check at beginning of this thread and yes fuel economy and driveability will be affected:thumbs:

 

Thanks, great thread.

 

A linky for a fix:
http://www.alfaowner.com/Forum/engines-ts-jts-jtd-and-v6/112935-how-to-change-a-thermostat-on-a-twinspark.html

Have fun ladies and gents.

 

changed mine at the weekend, nice simple job

Took intake pipe and the battery out to get access to the metal bracket that holds the wiring so I could access the bolts on the stat housing, replaced the OEM hose clip with a stainless jubilee and topped up. Now warms up fairly quick and much warmer inside, will see how much the fuel consumption improves as the weeks go by.

Dave