a-series oil temp sensor, best position

[DotMatrix]

where is the best position to mount an oil temp sensor in an a-series engine?

I was thinking to position it low down in the side of the sump. is it better to position in in the pressure side of the oil stream?

[KLAS]

depends on what you want to measure.

i like mine right at the oil filter housing. i remove the bypass valve, fit an aluminium plug instead and drill and tap for 1/8 NPT as it is the most common thread i found for aftermarket sensors.

i know MPi Minis use a sensor at the oil pressure regulator, but it doesn't react very quickly

[DotMatrix]

Yes and measuring the oil temp going into the engine seems a good idea.

So you dont refit the bypass valve?

[KLAS]

yes, i leave it out. i even couldn't refit it as the temp sensor uses its place.
and as i replace oil and filters regulary and with quality parts i don't think i will ever run into trouble where the oil filter bypass would save anything. at least it didn't the last 15 years

[DotMatrix]

yes, i leave it out. i even couldn't refit it as the temp sensor uses its place.
and as i replace oil and filters regulary and with quality parts i don't think i will ever run into trouble where the oil filter bypass would save anything. at least it didn't the last 15 years

ok. well you learn something everyday e.g I read about the oil filter bypass valve on the minispares page and many of their aftermarked filter housings don't even have the bypass valve as they say it operates at 7 psi and there for will be constantly leaking oil past the filter. this sounds really strange if true.

[KLAS]

yes, but that is differential pressure. and if my oil filter would restrict the flow to create said 7 PSI of pressure drop i would use an other filter manufacturer.