hi everyone, i got a question, i got a fiat grande punto 1.4 2008 8v, i have problems with the temperature of the engine oil and the coolant, they dont come up to 90°C, it stays in 60 to 70 °C and dont to come to the standard temperature thats is 90 °C, 3 weeks ago i changed the radiator, but the car temperature was normal until now, i have check the coolant and oil and they are on max, what should be the problem with my car?

Did you change the thermostat when you did the rad?
If not that could be your problem
I take it the cars temp gauge also didn't get to the correct place

i didnt changed the thermostat so maybe that would be that problem, i have been testing the car, and when i start it and dont drive the coolant temperature and engine oil reaches 83°C, but when i start to driving at 60 km/h or 90, it gets slowly down to 70 or 75 °C, btw here where i live is cold, right now is doing 2 °C, could it be the weather temperature?

I think chris is almost certainly right. Thermostats on these engines do tend to behave like this when they get old. In fact my Panda 1.2 is needing a new one right now.

Pugglt Auld Jock said:

hes

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but what is weird is that the oil engine gets the same temp as the coolant, so its weird

you can see on the pic, oit is on 74 degrees its lower than the coolant temperature, and i am reading the temperatures from the OBD

bravo23321 said:

but what is weird is that the oil engine gets the same temp as the coolant, so its weird

you can see on the pic, oit is on 74 degrees its lower than the coolant temperature, and i am reading the temperatures from the OBD

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The oil temp will always (as far as I know) lag the water temp. So, especially if you are stationary, when warming up the water temp will reach it's max before the oil. Even on my petrol turboed Ibiza the oil never gets hotter then the water unless she's working really hard under boost, like climbing a long hill. Then, if your thermostat is not regulating properly, the water will cool down pretty quickly because it'd going through the radiator so can loose heat very rapidly due to the cold air going through the rad. The oil will cool more slowly because, on our engines, there's no oil radiator so heat can only be lost through the sump and engine block.

My best guess is that the rubber ring in the thermostat is perished or there's maybe a problem with the wax cartridge. Try a new thermostat it'll probably sort things out.

so lets say the thermostat is open and wont close, can i drive the car a few weeks until i get the new thermostat? i need to drive like 60 km everyday.

bravo23321 said:

so lets say the thermostat is open and wont close, can i drive the car a few weeks until i get the new thermostat? i need to drive like 60 km everyday.

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Mine never gets more than up to the quarter mark on the gauge unless I'm sitting in heavy traffic and it's been like that for about 9 months now. I meant to do it when the warm summer weather was here because I work outside but we've had a lot on our plate this year and I just never got round to it.

With the engine running cold it's likely that it won't properly evaporate water vapour inside the engine - especially now winter is here - so maybe you'll get a bit of oil emulsification but I haven't noticed it on mine. I'm going to do it before her MOT in Feb though because she's probably over fueling a little which might affect emissions and probably is making the Cat work a little harder.

So, although not ideal, you'll probably be Ok to use the car but the sooner you get the new one fitted the better. They are not expensive and available just about everywhere. All my local factors stock them - I've been offered a Mahle branded one for approx £15.00 and a Quinton Hazel or First Line for around the £10 to £12 pound mark - or there's always the boys at Shop4parts if you want a genuine factory product at a good price.

In fact I'm being silly about mine, I must just bite the bullet, put my padded shirt on an get it done!

PS There are a couple of types, both are castings which contain the thermostat inside - Make sure you get the right one. You are pretty much likely to have the cheaper and simpler one which just has a spigot for the radiator hose (like mine) later cars - and they changed around mid 2010 I think - also included the temperature sender and heater hose spigot and they seem to sell at around the £35 mark or more. They are not interchangeable. Giving your registration number should be enough to get the right one but it wouldn't hurt to have your VIN (chassis No) handy just in case.

for what you say its better to fix it, so i will buy the thermostat tomorrow and install it, lets hope it work