URGENT oil pressure stop engine

[Tazgti5]

Mate just give the car to a proper garage who know what they doing ?

[doylebros]

To be honest I don't think il have time to remove head, and either wait for current head to be repaired or wait for new head. I think my best option is to refit a cheap chain and tensioner, time it up, hand crank it, compression test it, hope that only one or two valves have bent and that the engine will run even if in limp mode so I can drive it somewhere to have the head removed and repaired. I did as r5gtt suggested and bought the future in laws some wine to try and butter them up but I think I've still only got one week, two max and it'll take longer than that to sort out the head. It's a shame because strangely enough I'm enjoying the various bits of work I'm doing and would like the chance to take the head off to better understand the engine. Plus it would be serious DIY points in my books

Plenty advice,from every direction and all good if you have the time money and tooling etc.
I would do exactly what you say in the above minus the driving,tow yes drive no.
Let's have a bit good luck and be patient with yourself and you'll have it all sorted one way or the other eg replacement engine or top end. Pesky keep in mind to spend as little as possible to allow you to do a sensible evaluation.

[pudding]

There is money to be saved using aftermarket parts.  I paid £240 for all the chain gear from VW.  I just like the peace of mind of OEM bits.  Chain is made by JWS.

You might not have bent any valves.  You might have been lucky and the chain snapped at a non critical timing event and perhaps a couple of valves kissed a piston as the valve springs were unloading the cam.  A leak down test would be the best way to check but you need a compressor to do that.  Or you could just put it back together and see what happens.  If it runs like cack you know what's next!

[Pesky jones]

If I crank it over by hand and it doesnt sound or feel like ahit then ill compression test it. If that comes back good I might just turn it on to see if it runs.

I just have to wait for the chain and tensioner now :( I hate not being able to do anything. I cleaned the garage and work area, and I took the.cam chain cover apart to search for missing plastic from tensioner and the metal from chain but couldnt find it.

I also just pushed the plastic from.the camshaft solenoid back on to the prongs, tbh it might work like it is.

Couldnt.find any more missing bits, but tomorrow ill have a.good search inside the camshaft area and inspect anything.

Becase the exhaust cam is still in time, thwn none of.the valves willl on the exhaust side will have bent?

[doylebros]

How far you from Pudding use his old bits.

[pudding]

I chucked all my old bits!

If there aren't any bits of plastic in the chain cover, you should be fine.  It's the only place they can go.

Exhaust valves are strong, you might be OK.   In theory, when the chain snapped the inlet cam probably snapped shut enough of the intake valves to stop the engine, so there's a slim chance you might have got away with it.  How fast were you driving at the time?  If it happened at idle speed, your chances improve dramatically.

[Pesky jones]

The oil pressure light came on (might be worth noting it was intermittent? Pretty sure it wasn't consistent times of being off and on etc) when I was still on track so I pulled off the track. Then turned car off, let it cool, turned it back on and drove a hundred yards. Then, as I was coming to a stop, pretty much at a dead stop it cut out.

If yours seeped oil as well, I dont know where the oil pressure message came from?

[callis]

Hy buddy

Just got back from holiday and was interested to see what had happened to your oil problem. I am sorry to see that your chain has snapped, i honestly thought it was just blocked and had fingers crossed for you.

On a side note, is a snapped chain something that VW may help with cost of repair? Shouldnt really snap at all and should surely last time of the engine?

[r5gtt]

Did I send you this?.

[Pesky jones]

Hi mate yeah I think you did but ive seen it before anyway. Do you thibk its relevant to mine? It looks like the top guide snapped and allowed extra travel of the shaft

[Pesky jones]

The thing thats getting me is why did I get the oil message coupled with the mega rattly sound for a considerable amount of time before it cut out.

What would make sense to me is if the tensioner failed, giving the oil message, and then after a while with the tensioner.not.working the.chain snaps.

However, I cant pin point anything wrong with the tensioner, apart from a snapped bottom guide. It.might havr snapped, and then the snapped chunk got in the way of the chain and snapped it. But that snapping wouldnt affect oil pressure.

If anyone wants to havr a good think about It that would be great

[r5gtt]

I think it's very relevant mate. having a broken chain and loose chain are quite similar in terms of damaging valves.

[rich83]

You can deliberate it ad nauseam.. but you really just need to crack on get the head off.

[r5gtt]

The thing thats getting me is why did I get the oil message coupled with the mega rattly sound for a considerable amount of time before it cut out.

What would make sense to me is if the tensioner failed, giving the oil message, and then after a while with the tensioner.not.working the.chain snaps.

However, I cant pin point anything wrong with the tensioner, apart from a snapped bottom guide. It.might havr snapped, and then the snapped chunk got in the way of the chain and snapped it. But that snapping wouldnt affect oil pressure.

If anyone wants to havr a good think about It that would be great

The oil pressure will drop amd illuminate on the dash as you drove the car to a stop not realising what damage would be caused and then trying to start it a few more times totally killed it. chain snaps and you get bent valves. I bet if you fit the chain and tensioner in you'll start the car and it will misfire on a few cylinders. usually inlet valve side iirc  anyone want to add to this?.

[Pesky jones]

The oil pressure will drop amd illuminate on the dash as you drove the car to a stop not realising what damage would be caused and then trying to start it a few more times totally killed it. chain snaps and you get bent valves. I bet if you fit the chain and tensioner in you'll start the car and it will misfire on a few cylinders. usually inlet valve side iirc  anyone want to add to this?.

Yeah, exactly that... what im wondering is what caused the oil pressure message..like I said the engine would cut out as soon as chain snapped and thus most liekly bending load of valves, so what was happening up untill the chain snapped. Id be happy if the tensioner looked like the one in the video, because if that was mine, I could say tensiinerr guide snapped, shaft extended, lost oil.pressure, continued running with pressure message and sounding like sh*t, then after a while the chain snaps and bends valves. New head/repair valves and new chain and tensioner job done. But my tensioner doesnt look like that, apart from the snapped bottom guide it still looks like it would be functional.

In regard to removing head (assuming I can do it  ) ill probably just see bent valves and wont know why the oil pressure message came up. If t fit cheapish new chain and tensioner and start it, and it just misfires, but with no oil pressure message, then happy days, ill know it was the tensioner that failed and I can source a new head kind of confident that I wont have an oil issue.

well the exhaust side is still in correct timing so will only be inlet side valves damaged surely?