Chimaera oil pressure
Discussion
Hi all,
I’ve recently carried out an oil and filter change. I took the opportunity to also change the sump gasket and re-seal the pressure sender (was a slight leak present). Prior to this work oil pressure was indicating normal (30 psi plus).
On restarting the engine oil pressure was indicating zero. I suspected I’d been over enthusiastic with the plumbers tape and the sender was no longer earthing against the engine block. I removed the sender and re-sealed ensuring not to overdo the tape. Now, as soon as I turn on the ignition (but not starting the engine) the pressure gauge goes straight to maximum 90 psi plus. Once the engine is started it still indicates maximum. I’m happy that the oil is circulating at a good pressure and the problem is with the sender. Any ideas what may be causing these symptoms?
Many thanks
I’ve recently carried out an oil and filter change. I took the opportunity to also change the sump gasket and re-seal the pressure sender (was a slight leak present). Prior to this work oil pressure was indicating normal (30 psi plus).
On restarting the engine oil pressure was indicating zero. I suspected I’d been over enthusiastic with the plumbers tape and the sender was no longer earthing against the engine block. I removed the sender and re-sealed ensuring not to overdo the tape. Now, as soon as I turn on the ignition (but not starting the engine) the pressure gauge goes straight to maximum 90 psi plus. Once the engine is started it still indicates maximum. I’m happy that the oil is circulating at a good pressure and the problem is with the sender. Any ideas what may be causing these symptoms?
Many thanks
kris450 said:
phillpot said:
If gauge is going to max pressure there's no problem with the connection or earth!
Sender unit kaput?
I'll second this. Had exactly the same scenario. One day the gauge was all fine, then the next day on start up the needle went off the scale. No warning or playing around with it. New sender sorted it.Sender unit kaput?
Hi,
I'd read the above thread previously and my only concern is the replacement sender is longer than the original and requires jacking of the engine to fit/remove.
As you've said, it's only indication as they're not calibrated test guages and if the low pressure switch is not active (plus water temperatures are in the normal range), it's just an indication of pressure increasing and decreasing with the engine. I'll continue to try and source a replacement here in Euro Land (1/8NPT, 0-100psi)
I'd read the above thread previously and my only concern is the replacement sender is longer than the original and requires jacking of the engine to fit/remove.
As you've said, it's only indication as they're not calibrated test guages and if the low pressure switch is not active (plus water temperatures are in the normal range), it's just an indication of pressure increasing and decreasing with the engine. I'll continue to try and source a replacement here in Euro Land (1/8NPT, 0-100psi)
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