Busy traffic coolant temp

[Tufan]

Hello. Is it normal to see 115 deg C at stop and go traffic. Reduces to 90C at normal driving.

Thanks

 

[CatmanV2]

Hello. Is it normal to see 115 deg C at stop and go traffic. Reduces to 90C at normal driving.

Thanks

Not really, no. Are your fans coming on properly? Coolant level OK?

C

 

[Tufan]

Not really, no. Are your fans coming on properly? Coolant level OK?

C

Hi Catman. Issue is with a friend's 4200 and fan/radiator is ok.

 

[CatmanV2]

Hi Catman. Issue is with a friend's 4200 and fan/radiator is ok.

Not a good thing. One other things you can check: Is the system pressurising, if the header tank cap is not maintaining pressure you'll have issues. Stat might not be opening properly. If I was your friend, I'd have it to a mechanic without further ado. If it's overheating, it could get very expensive.

C

 

[Tufan]

Not a good thing. One other things you can check: Is the system pressurising, if the header tank cap is not maintaining pressure you'll have issues. Stat might not be opening properly. If I was your friend, I'd have it to a mechanic without further ado. If it's overheating, it could get very expensive.

C

Thanks Catman, will have these checked. Especially as it's getting warmer around here.

 

[conaero]

Can I ask what your oil pressure reading is when it hits 115 degrees?

If it's reading a third or more I would say your getting a bogus temp reading. At 115 degrees the oil would be so thin you would be lucky to get 1 bar of pressure and that would throw the oil pressure warning light.

 

[CatmanV2]

Good point, Matt
C

 

[Contigo]

If it's constant no. Went for a last in the GTS a couple of days ago and looked down at the temp gauge whilst being sat in traffic/stopped and it likes to just below 120 so I turned off the engine and restarted which resulted in a normal reading. SItuation normal "It's Italian" I thought and carried on my merry way!

Be proactive, if temps are rising then check thermostat, coolant leak, rad pipes and also head gasket/compression. No car should rise above 90-100 whilst in traffic unless there is a fault or they are Air cooled.

 

[philw696]

All the 4.2 and 4.7 engines have a little coolant hose at the back of the engine only about 75mm long that with age leeks at where it joins the metal pipes and commonly splits wide open done a few down here.
Never known one to blow a head gasket yet.

 

[davy83]

there are two cooling fans that come in at different temperatures, make sure both of these are running

 

[Tompelli]

Bearings in both fans in mine went last month. Aircon not keeping up with outside temperature & engine running hot - get them checked.