No oil pressure

[stevieturbo]

100 OCTANE said:

es I did change the oil filter, with a original BMW. I used a 10-50w oil, BMW recommend 10-40w so could this cause the problem?

No

[Boosted LS1]

227bhp said:

Not on a motorbike engine.

So, we're still left with the knock that's sorted itself out. Tiz bizarre this.

[227bhp]

Boosted LS1 said:

227bhp said:

Not on a motorbike engine.

So, we're still left with the knock that's sorted itself out. Tiz bizarre this.

Breathe the pressure
Come play my game I'll test ya'

[100 OCTANE]

Boosted LS1 said:

So, we're still left with the knock that's sorted itself out. Tiz bizarre this.

I think the problem lies with the gravity feed, is too low from the oil tank, I've no idea how to check it.

[Blaster72]

I'm not really understanding why you can't prime the system just because you can't take the plugs out.

Surely you just pull off the plug leads or pull the fuse for the fuel pump and turn it over until pressure builds up?

I'm also struggling with your current problem - is it still knocking? Did it just tap a bit until the pressure built up?

You've done a track day since, surely you didn't do this with the engine knocking.

Pretty confusing. If it's just the oil pressure light that takes ages to go off, I'd change out the pressure sensor first and see how it goes.

[100 OCTANE]

Blaster72 said:

I'm not really understanding why you can't prime the system just because you can't take the plugs out.

Surely you just pull off the plug leads or pull the fuse for the fuel pump and turn it over until pressure builds up?

I'm also struggling with your current problem - is it still knocking? Did it just tap a bit until the pressure built up?

You've done a track day since, surely you didn't do this with the engine knocking.

Pretty confusing.
If it's just the oil pressure light that takes ages to go off, I'd change out the pressure sensor first and see how it goes.

It's not possible to prime the system on the starter, cambus electronics, if it was possible it would take to long, as the starter is very small it would most probably over load it, as it 30 seconds running the engine before the oil pressure comes up after the oil change. It only knocks for 30 seconds after the oil change, after that it runs fine

[Blaster72]

Trust me, 30 seconds won't overheat or overload a starter.

Canbus wiring makes no difference, pull the fuel pump fuse and it'll still turn over.

[PositronicRay]

100 OCTANE said:

Blaster72 said:

I'm not really understanding why you can't prime the system just because you can't take the plugs out.

Surely you just pull off the plug leads or pull the fuse for the fuel pump and turn it over until pressure builds up?

I'm also struggling with your current problem - is it still knocking? Did it just tap a bit until the pressure built up?

You've done a track day since, surely you didn't do this with the engine knocking.

Pretty confusing.
If it's just the oil pressure light that takes ages to go off, I'd change out the pressure sensor first and see how it goes.

It's not possible to prime the system on the starter, cambus electronics, if it was possible it would take to long, as the starter is very small it would most probably over load it, as it 30 seconds running the engine before the oil pressure comes up after the oil change. It only knocks for 30 seconds after the oil change, after that it runs fine

I know it's not the same thing but I had an old Sunbeam (car engine) that used to do this.
I'd fill the filter before fitting, crank and crank but no pressure. Start and the bearings would knock, pressure would come up after 30-40 (seemed to be very long seconds) and giving it a few revs. Oil pressure was always fine, and when laid up for 3 months it'd start straight away with good pressure. Just changing the oil was a bit "heart in the mouth"

[100 OCTANE]

Blaster72 said:

Trust me, 30 seconds won't overheat or overload a starter.

Canbus wiring makes no difference, pull the fuel pump fuse and it'll still turn over.

I don't think the starter will turn the engine over at 1100rpm so it will take longer than 30 seconds.

[Blaster72]

Its worth a go next time, even if you only give it a few 10 second bursts on the starter and then put the fuse in and start it normally.

It certainly won't do any harm to pump the oil around a bit at least.

[Boosted LS1]

100 OCTANE said:

I think the problem lies with the gravity feed, is too low from the oil tank, I've no idea how to check it.

Could you pressurise the tank to push oil around whilst engaging the starter occassionally? Maybe an Ezybleed kit would help.

[Steve_D]

Boosted LS1 said:

100 OCTANE said:

I think the problem lies with the gravity feed, is too low from the oil tank, I've no idea how to check it.

Could you pressurise the tank to push oil around whilst engaging the starter occassionally? Maybe an Ezybleed kit would help.

Good call. May not even need to crank it over just let the pressure build.

Pretty much the same thing an Accusump does.

Steve