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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?

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

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

So you dont refit the bypass valve?

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

KLAS wrote: ↑Fri May 05, 2017 7:37 am 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.

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.