I have a mechanical HKS oil pressure gauge and I noticed today that whilst accelerating especially on boost the gauge dipped down about 1 bar let off the pedal and it creeps back up to 3 - 4 bar.. :(

 

I've never noticed this before now and I'm sure it ain't right.

It rises and falls as it should do at idle and reads about 1.5 - 2 bar at idle when fully warm...

 

The standard gauge reads normal however it did fall to zero the other day but I put this down to maybe the sensor going faulty, but with noticing the effect of my mechanical gauge I'm now quite concerned. :cry:

 

There are no oil leaks and the engine doesn't smoke, I was thinking maybe the oil pump is on it's way out, anyone agree or think of anything else to check? :bow:

 

cheers Jon..

Where is the the position of the sender ? possibly the position is in a gallery that is on the lea side of the flow and its self is a low supply or restricted gallery hence on full boost/ high revs the pressure readings fall, or may be that is rubbish and the sender has a problem?

 

Jeff TT

Where is the the position of the sender ? possibly the position is in a gallery that is on the lea side of the flow and its self is a low supply or restricted gallery hence on full boost/ high revs the pressure readings fall, or may be that is rubbish and the sender has a problem?

 

Jeff TT

 

The sender is just a fitting taken from off the side of the oil filter housing, which is piped direct to the gauge, it's been reading fine for 6 month's or more as I've said I've not noticed it doing this before... :(

 

cheers Jon.

Check the oil level on a level surface. Mine does similar if the oil level is allowed to get too low. Mind the zed sump only holds about 4 litres anyway and if you been driving hot and hard lately it may be low. To burn half a litre per 1000miles is not unusual. Then you accelerate hard and between the g force and the pump sucking hard the oil pick up pipe ends up sucking air and it cavitates losing pressure. Keep it up and ruined engine could be next.

Check the oil level on a level surface. Mine does similar if the oil level is allowed to get too low. Mind the zed sump only holds about 4 litres anyway and if you been driving hot and hard lately it may be low. To burn half a litre per 1000miles is not unusual. Then you accelerate hard and between the g force and the pump sucking hard the oil pick up pipe ends up sucking air and it cavitates losing pressure. Keep it up and ruined engine could be next.

 

 

That makes sense, I will check the oil level again, I'm gonna do an oil change this weekend anyway, but as for the moment I'm driving off boost until I get it sorted out. Don't want my engine to end up looking like a molten volcano erupting blasting into a zillion bits lol... :rolleyes:

 

cheers Jon.. :)