T25 1.9 petrol oil pressure problems

[Ginojasper]

I'm in need af a mechanic who can check the oil pressure for me and see if it's faulty sensor or pressure and see if anything can be done to rectify.
I live near Manchester so if anyone can give local numbers for mechanics much appreciated

[kevtherev]

It's such a routine and simple check any garage should be equipped to do this
The oil pressure acts on a switch not a sensor.
The switches are available from Brickwerks
What year is the van?

[Ginojasper]

It's a 1984, I've had it in a garage and it had a new oil pump oil and filter, plus the tappets set. This mechanic said this had done the trick as when I picked it up sounded like it should and no oil light. I drove about 3 miles then tappets noisey and oil light again. This happened again when left overnight.
I rang the garage a he hadn't checked the oil pressure so the problem wasn't solved.
I need someone who can give me a proper diagnostic to the problem as it cost me 200 for a mechanic to tell me it's ok but really wasn't checked once work was don!
A new garage is needed with more knowledge on t25?

[DoubleOSeven]

An oil pump won't create oil pressure I'm afraid. I strongly suggest this is done yourself or a helper if the thought of a cold floor this time of year, doesn't appeal. Buy a oil pressure gauge off Amazon for ~£20. Unscrew switch from between bank of push rods on the left, underneath the engine and screw in the gauge. Stone cold will be a couple of bar at idle rising to 4 or 5 at 3000 rpm, hot 0.5-1 bar at idle and 2-3 bar at 3000 rpm

Principle here:

https://youtu.be/I8teB16U0LA" onclick="window.open(this.href);return false;


Sent from my iPhone using Tapatalk

[itchyfeet]

The only problem with cheapo gauges is they can be inaccurate so you need to check them against another pressure gauge, I used a tyre with an ezebleed kit which I checked the pressure, doesn't need to be bang on but needs to be close.

[kevtherev]

It's a 1984, I've had it in a garage and it had a new oil pump oil and filter, plus the tappets set. This mechanic said this had done the trick as when I picked it up sounded like it should and no oil light. I drove about 3 miles then tappets noisey and oil light again. This happened again when left overnight.
I rang the garage a he hadn't checked the oil pressure so the problem wasn't solved.
I need someone who can give me a proper diagnostic to the problem as it cost me 200 for a mechanic to tell me it's ok but really wasn't checked once work was don!
A new garage is needed with more knowledge on t25?

Firstly did you supply the garage with the parts and oil?
can we presume you know what oil has been used if so what oil grade?
As I said any garage will do a pressure check, but if you want a specialist I can suggest a trip to GasureUK it's not too far. Steve is a Guru on T25s

http://www.gasure.co.uk/" onclick="window.open(this.href);return false;

I'd like to know what the hydraulic tappets were set at. they generally require no adjustment as they self adjust.

[itchyfeet]

It's a 1984, I've had it in a garage and it had a new oil pump oil and filter, plus the tappets set. This mechanic said this had done the trick as when I picked it up sounded like it should and no oil light. I drove about 3 miles then tappets noisey and oil light again. This happened again when left overnight.
I rang the garage a he hadn't checked the oil pressure so the problem wasn't solved.
I need someone who can give me a proper diagnostic to the problem as it cost me 200 for a mechanic to tell me it's ok but really wasn't checked once work was don!
A new garage is needed with more knowledge on t25?

What were the origional symptoms that made you take it to a garage?
As Kev says tappets may have been incorrectly set if it was not noisy before.
oil lights can be wiring faults.

[Ginojasper]

It's a 1984, I've had it in a garage and it had a new oil pump oil and filter, plus the tappets set. This mechanic said this had done the trick as when I picked it up sounded like it should and no oil light. I drove about 3 miles then tappets noisey and oil light again. This happened again when left overnight.
I rang the garage a he hadn't checked the oil pressure so the problem wasn't solved.
I need someone who can give me a proper diagnostic to the problem as it cost me 200 for a mechanic to tell me it's ok but really wasn't checked once work was don!
A new garage is needed with more knowledge on t25?

What were the origional symptoms that made you take it to a garage?
As Kev says tappets may have been incorrectly set if it was not noisy before.
oil lights can be wiring faults.
Original symptoms were oil light on and noise from the tappets as though no oil getting to them. This is why thought it might be oil pump

[Ginojasper]

It's a 1984, I've had it in a garage and it had a new oil pump oil and filter, plus the tappets set. This mechanic said this had done the trick as when I picked it up sounded like it should and no oil light. I drove about 3 miles then tappets noisey and oil light again. This happened again when left overnight.
I rang the garage a he hadn't checked the oil pressure so the problem wasn't solved.
I need someone who can give me a proper diagnostic to the problem as it cost me 200 for a mechanic to tell me it's ok but really wasn't checked once work was don!
A new garage is needed with more knowledge on t25?

Firstly did you supply the garage with the parts and oil?
can we presume you know what oil has been used if so what oil grade?
As I said any garage will do a pressure check, but if you want a specialist I can suggest a trip to GasureUK it's not too far. Steve is a Guru on T25s



http://www.gasure.co.uk/" onclick="window.open(this.href);return false;

I'd like to know what the hydraulic tappets were set at. they generally require no adjustment as they self adjust

I didn't supply the oil the garage did, if the wrong oil was used could this cause the oil light and noise from the tappets?
I also don't know about the tappets.

[kevtherev]

OK
yes is the answer to the wrong oil grade, but mal-adjusted tappets will do the same.
Please, please if you can't do work on your van please supply the people who are doing it, the parts.
If the garage tells you what they want and you don't know what it is then..ask here.

The tappets should have been set at zero lash minus 1 to 1.5 turns in at top dead centre (both valves closed) on a warmed engine, so there's no gap
NOT 0.6mm gap

ring up and ask them what the tappets were set at, and which oil grade they used, and also whether it was mineral or synthetic.

[Ginojasper]

I ve sent him a message asking these questions, will let you know asap. I know the oil was 15w40 but not sure synthetic or mineral.
What oil should it be?
So what you are saying is if tappets set wrong and wrong oil oil light will come on and noise will start from the tappets when warm?
There's no oil light or noise when first run.

[Ginojasper]

Got message back 15w40 semi synthetic oil and set the tappets to what it says in the Workshop manual.
He's also saying changing the oil pressure release valve could help is this correct?
I've not actually got a setting what he's used just what he says is in the book?!?
I've not got the tools myself to do these works but across the road there is a respectable garage.
If I could get details of yourselfs oil needed, tappet settings they should be able to carry the work out do you think?

[kevtherev]

15/ 40w mineral.
Tappet adjustment is in the workshop manual, although the values there are too high.
The tappets should have been set at zero lash then minus 1 to 1.5 turns in, not two as described, at top dead centre (both valves closed/firing stroke) on a warmish engine
Two turns does not give the lifter (tappet) enough time to fill with oil

However on saying that.
your issue with noisy tappets is when the engine has warmed and the oil is thinner. your mechanic is right to suspect the relief valve, some times the spring has weakened and lower pressures can result.
By far the usual suspect of lower oil pressures can be the result of worn main bearings, Equally lower pressures can be falsely detected by a faulty oil pressure switch, and a poor connection on the 14 pin dash connector.

I would be examining the actual oil pressure of the engine at working temp with a wet pressure gauge, perhaps the garage across the road can do this at a small cost.
pressures...
5bar when stone cold, settles back to 3.5 pretty soon and has over 1bar when hot at idle.
Touch the throttle and it instantly makes 2 bar and has 3.5bar when running at average speeds (hot is a constant 95 deg. C)

[Ginojasper]

So do you think correct oil and tappets set correctly might solve it?
If not relief valve?
I'm going to ask the garage across the road to have a look for me and show your notes of here.
Hopefully all good will come from your advice

[kevtherev]

So do you think correct oil and tappets set correctly might solve it?
If not relief valve?

Hard to call, I personally don't think so, although I would want those tappets set to the lower turn values, the oil pressure check will tell us a whole heap of things.

I'm going to ask the garage across the road to have a look for me and show your notes of here.
Hopefully all good will come from your advice

Good move, the check will also tell you what state the engine is in, pity this wasn't done before the oil pump was fitted, which I am surprised the garage you used initially didn't suggest it, with the problems you described it went in with.