Stupidly high oil temps

[fly]

I fitted a greddy temp gauge on an aftermarket sender and sandwich plate (mounted blow oil filter) and now i am getting stupidly high oil temp readings!

On the way home in traffic it was off the scale, well above 150c! surely the oil (15/40 Millers XML) would have sheared at those temps and my engine would have completely died?

I am a little worried about this problem and can only assume that the aftermarket send is sending dodgy readings to the greddy gauge, otherwise something is severely wrong!

Off topic but where can i get the restrictor pills for the wastegate control hoses as i forgot to take them out when doing my rats nest and they are in the bin somewhere, so im only getting solid 0.5 boost from both turbos...

[pdtaylor18]

If your oil is that high then the water will be very high as well, more likely something is not compatible with eachother.

[antnicuk]

did you earth it properly?  that can give dodgy readings

[SiH]

When you say \'aftermarket sender\' do you mena it\'s not a Greddy sender? If you do, then that\'s your problem - it will give completely skewiff readings - you have to use senders to match gauges as they usually exhibit different characteristics, often resulting in crazy readings. Failing that, it\'ll be an earthing issue, as above.

[hairyhoover]

could a earthing issue cause weird oil pressure readings on a aftermarket gauge as well?

[SiH]

Yup

Often senders earth by earthing through the thread to the item they are screwed into. This sometiems doesn\'t give a sufficient eart, especially if the lieks of PTFE are used to seal the threads. A god solution is to wrap a jubilee round the sender, and attach a wire to this, which is then earthed to the chassis

[fly]

Undoubtedly the sender then, the gauge was originally being used as a water temp which has its own sender and housing for the top rad house. I have ordered a saga V2 oil temp gauge which looks fairly good quality so hopefully i will get accurate oil temp readings i also used a fair amount of thread lock!

[pdtaylor18]

only use the threadlock if its on a rotating or high useage/vibration areas such as brakes,suspension etc.  PTFE can be used on threads but it only acts as a lubricant for the threads and not a seal. Things such a temp senders etc really should not need anything but a bit of PTFE tape will help the threads cut as some are slightly tapered.

[Fendamonky]

Undoubtedly the sender then, the gauge was originally being used as a water temp which has its own sender and housing for the top rad house. I have ordered a saga V2 oil temp gauge which looks fairly good quality so hopefully i will get accurate oil temp readings i also used a fair amount of thread lock!

It\'s my understanding that the Greddy Water temp gauge is a dual usage gauge. Meaning that the complete kit (sender/gauge) can be used as either oil temp, or water temp.

Are you sure the aftermarket sender isn\'t just pushing readings in Fahrenheit? That could also explain why you\'re showing such high numbers.