Thought I'd start a new thread for this as I've now got oil pressure readings.
As mentioned in other threads, I'm getting the oil warning light on at idle when the engine is hot. I'm assuming it's coming on due to low pressure. The light goes away when the engine revs rise. To start with, it would go out if I put the gearbox in neutral as the small rise in revs was enough to make it happy.
Whatever the issue is, it must be getting worse as this workaround has stopped working. I now need to put it in neutral and press the accelerator to make it go away.
The car went in to have the oil pressure checked yesterday. They found the following readings (the readings were the same on the old pressure sensor and the new one I sent in with the car):+1:
11psi at idle, cold engine
10psi at idle, hot engine
28psi at 2,000rpm, hot engine
He also reported the engine to be "slightly rattly" - on top of the cat/heatshield rattle that I was aware of.
The guy at the garage believes that the oil pressure should be OK with these readings. Does anyone know what the oil pressure should be under various circumstances? I've had a brief look in RAVE but not sure which section it would be in.
From here he's quoted:
£150+VAT to drop the sump, remove the crank bearings and check them over.
£450+VAT to replace the oil pump and timing chain if the bearings check out OK (minus the cost for checking the bearings, so £300+VAT on top of the £150+VAT to check them). No parts required as I've already bought them.
If the bearings turn out to be worn he says the engine then needs to come out, flywheel off, crank out to be sent for grinding etc. Very rough ball park figure of £1600-£1700+VAT for this. He says it's been a long time since he's had to do a job like that and he's not sure off the top of his the cost of grinding a crank etc.
His recommendation from here is to check the bearings first. This makes sense as it's the most easily accessible thing to check.
Before I jump in and kick off more work, do the oil pressure readings give you guys any thoughts on what might be at fault? I trust the garage it's at but you guys have such a wealth of knowledge on these specifically. I've also got a fair bit of time in which to play Internet Detective as he can't fit me in for any repairs until the week beginning the 12th :(
Would you be happy driving around in a car giving these oil pressure readings? Traffic is particularly stressful as the engine speed drops low enough to bring the light on when coasting at 20mph or under.