View Full Version : Q4 Thermostat
Need a new engine thermostat and they are out of production.
What do you think I should do?
I could phone round everywhere but the likelihood of finding someone with one sat on the shelf is pretty small - Mangoletsi (UK Alfa dealers) told me that eper says its unique to the Q4 :rolleyes:
65-70C engine on the motorway isn't all that bad but its certainly not right.
Any help or suggestions?
Cheers
Jack
Steve Webb
28-08-07, 16:48
can'y believe that they would use a completely unique stat for the Q4, a grale or fiat coupe one must physically fit. Also 3rd party/ pattern manufacturers must do them.
I'll have a look through the old version of eper I've got to see if I can spot anything.
Steve Webb
28-08-07, 18:18
Bloody hell!!! Its one hell of a thermostat isn't it?
Firstline do one P/N is FTS149.86 but it looks like a replacement thermostat rather than a complete replacement unit :D :D
I will look in to this, also wrinx found this - might be the easiest route!
http://www.alfa-service.eu/alfa/product_info.php/cPath/1_66_90_95_97/info/p3692_OE--7723789-THERMOSTAT-155-Turbo-Q4.html/XTCsid/6ed4d8a287b8bbee3bd48e0700ff1116
Bloody hell!!! Its one hell of a thermostat isn't it?
and yes, there is a lot of pipes!!!!
Looks like it's been designed by the same people who did the 16v thermostat!!! Bloomin' 'orrible!
As posted on 155.org...surely the Coupe 'stat is similar enough???? Don't suppose anyone owns a Coupe and can compare :lol:
wrinx
Im going to join up to FCCUK now and ask for a pic :)
Jeezzz, we were only asking and he swears at us...no need for the "F" word :rolleyes:
;)
wrinx
Jeezzz, we were only asking and he swears at us...no need for the "F" word :rolleyes:
;)
wrinx
:tapedshut: :tongue2:
Juan AR155Q4
30-08-07, 04:44
Fiat Tipo Sedicivalvole has the same from the outside. Don't know what temperature does it open but can't be too different.
A guy from here openned one of this and changed the spring in a Tipo. I'll try to get some more info.
Thanks Juan. I am still hoping to get more info on the Fiat Coupe 16v T one, it looks so similar.
Does anyone know if the internal bit is replaceable?
I ask as I could buy this:
http://www.firstline.co.uk/op3/product_set.php?mode=1&type=PV&mmeid[5]=35&make=Alfa%20Romeo&model=Alfa%20155&subvariant=-&product=Thermostats
Problem is, I do not know if its a mistake? I guess its going to be cheap so I could just get it and try...
Juan AR155Q4
31-08-07, 17:05
That?s what I?ve said, or try to said, that he changed the internals.
That?s what I?ve said, or try to said, that he changed the internals.
Ah, sorry Juan, I misread. I will get it and see :)
Does anyone know if the internal bit is replaceable?
I ask as I could buy this:
http://www.firstline.co.uk/op3/product_set.php?mode=1&type=PV&mmeid[5]=35&make=Alfa%20Romeo&model=Alfa%20155&subvariant=-&product=Thermostats
Problem is, I do not know if its a mistake? I guess its going to be cheap so I could just get it and try...
Doing a sterling job Jack :biggrin:....hope you sort it!
wrinx
Doing a sterling job Jack :biggrin:....hope you sort it!
wrinx
So do I!!! its been a PITA!!
So do I!!! its been a PITA!!
I had the same same problem with low engine temp. on a highway and searched for the thermostat as was told is out of production.
We found a thermostat which is labled as Coupe 20V
Sorry for the unfinished post.
I had the same same problem with low engine temp. on a highway and searched for the thermostat as was told is out of production.
We found a thermostat which is labled as Coupe/Delta 16V turbo, but it did not had a turbo cooling channel/whole and one more whole for one of the coolant temperature sensors that were missing. The body and the piping was exactly the same. So we "fixed" the the new unit from these two "faults" and replaced the old one.
It says Behr Thermot-troniks Italia as a producer. Could be an option to replace the old one.
I'll post some pictures of the thermostat I replaced old one with later.
M.
How did you "fix" the new unit?
wrinx
How did you "fix" the new unit?
wrinx
Just bored and threaded the two holes that were needed.
M.
The turbo cooling missing:
http://img337.imageshack.us/img337/2586/dsc00174da0.th.jpg (http://img337.imageshack.us/my.php?image=dsc00174da0.jpg)
The temperature sensor hole missing:
http://img337.imageshack.us/img337/9562/dsc00172pu1.th.jpg (http://img337.imageshack.us/my.php?image=dsc00172pu1.jpg)
Manufacturer and car/product specs:
http://img337.imageshack.us/img337/7006/dsc00211jp8.th.jpg (http://img337.imageshack.us/my.php?image=dsc00211jp8.jpg)
Thanks for the info! Sounds a good idea if the internal replacement bit is a problem. I will let you all know if I ever get it :)
Just bored and threaded the two holes that were needed.
M.
As I thought, thanks :smile::cheers:
So we have another way to get a thermostat....just need to see if Jack's plan comes together and decide which to use ;)
wrinx
I've been watching this develop and as I work in Scotland and it's starting to cool over night and I need a new thermostat too.
The best option I've found so far is the fiat coupe 2.0 16v IE thermostat as all the fittings are in the same place with the exception of the EGR sensor,which you can do away with or as posted above drill and tap.
Fiat part No.7772114 Thermostat ?53.10 Mangoletsi
` 7701854 Gasket
Quinten Hazel No. QTH520K ?33.95
Both + VAT and delivery
Nope the main pipe didnt unscrew, instead it just turned, no hope of fitting the part that FirstLine list - the pipe you need to remove is press fitted, so now that iv tried turning the pipe I have broken the seal and it leaks, so car is off the road untill sorted :(
It will have to be the Coupe route I think!
Though I dont know who is going to drill those holes out - i bet its not easy!
Pavs you mention the Coupe 2.0 16 IE - and mindus, you mention the Coupe 2.0 16v Turbo - are they the same?
The best option I've found so far is the fiat coupe 2.0 16v IE thermostat as all the fittings are in the same place with the exception of the EGR sensor,which you can do away with or as posted above drill and tap.
Even the turbo water feed?
the Coupe 2.0 16v N/A has a hose connection from the same port as the turbo cooling one it is just a case of unscrewing the one supplied and screwing the Q4 connection in
Pavs you mention the Coupe 2.0 16 IE - and mindus, you mention the Coupe 2.0 16v Turbo - are they the same?
Don't know if they are the same. If the turbo cooling channel is missing, they're the same then ;)
Should be careful when drilling, better to drill on kind of drilling bench than using a simple drill(any car workshop should be able to cope with that, IMHO).
Don't know if they are the same. If the turbo cooling channel is missing, they're the same then ;)
Should be careful when drilling, better to drill on kind of drilling bench than using a simple drill(any car workshop should be able to cope with that, IMHO).
No you misunderstand, the 2.0 16v N/A coupe thermostat housing is the same as the Q4 with the exception of the EGR sensor socket
Good news then...
Shop4parts S4P472
?32.32+vat+del.
wrinx
Thats great, thanks very much guys!
Just for info:
This is the Coupe 2.0 16v N/A thermostat:
http://www.nbarnes.easynet.co.uk/Images/coupe/thermo/newfront.jpg
Got it today, just need one hole to be drilled and tapped and job done I hope :)
All done. If anyone else needs to drill the hole for the sensor you need a 14.5mm drill and an M16 x1.5 tap.
Got a constant 87c when on the move now :D
Another well done!
Will have ot get on this soon....ANOTHER job :doh:
wrinx
The best option I've found so far is the fiat coupe 2.0 16v IE thermostat as all the fittings are in the same place with the exception of the EGR sensor,which you can do away with or as posted above drill and tap.
Thinking about doing this job now as my temp reading is normally around the 70deg area unless in traffic :rolleyes:
Pavs...have you noticed any benefit without the EGR valve?
wrinx
Glad I checked this...was about to buy a 16v Turbo thermostat....it's the normally aspirated thermostat as I've already removed the EGR system :D
wrinx
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