URGENT oil pressure stop engine

[DANBOY66]

start removing the head mate

i have just removed a bwj engine with a hole in the block

 i need to take the head off it to see if its any good if its ok we can have a deal 

dan..

[Pesky jones]

start removing the head mate

i have just removed a bwj engine with a hole in the block

 i need to take the head off it to see if its any good if its ok we can have a deal 

dan..

Sounds like a plan! Let me know!

[Dan_FR]

Hard to say about the cam when you shouldn't be turning one without turning the other. 

Either way the head will need to come off as you will have bent valves. May not need a new head, it could be perfectly salvageable and just need cleaning/repairing and building up with new valves etc. You wont know until its off - although depending on price - a second hand one could be cheapest.

Whether or not the bottom end/oil pump is ok - who knows. Only way to is to inspect it - or sort the head/chain and take a chance. I'd want to find the missing bits of chain first though.

Personally I would remove the oil pump to check it, as if that's finished and was the cause of a loss of pressure, it could end up more cost effective sourcing another engine to drop in. For a £60 cost of bolts you would be able to inspect oil pump and bottom end, and  know whether you are wasting more time and money

[Pesky jones]

@Dan_FR The only thing is ive already dropped the sump, and put new oil in, so im ever so slightly hesitant to do it again, although I know I should really and probably will. I'm not even sure how the oil pump comes out. I know its built in to the balance shaft unit, but im not sure how that comes out. I think its pretty complicated because the oil pump is driven by chain of the crankshaft so removing it might prove difficult.

Yeah I'll take the head off and have a look at it and assess condition. There's one tiny bit of the chain missing, in the video I show one of the two bits.

[d11ps]

Wow...I'd say the head is toast, the extent of the damage will only be exposed once it's off. Hopefully it's just valve damage and not anything else...good luck mate


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[pudding]

Yep that is a small consolation lol

Judging by the state of the tensioner, can anyone tell me if that would explain the oil pressure message on the dash?

What do people make of the turning action of the inlet camshaft?

The tensioner has extended beyond it's normal range of travel because of the chain snapping, which is why it's lop sided.

As for the pressure warning, it's probably expected if the tensioner suddenly loses all it's pressure. 

Yeah the cam will snap round because of the valve springs pushing on the lobes.

[Pesky jones]

Yep that is a small consolation lol

Judging by the state of the tensioner, can anyone tell me if that would explain the oil pressure message on the dash?

What do people make of the turning action of the inlet camshaft?

The tensioner has extended beyond it's normal range of travel because of the chain snapping, which is why it's lop sided.

As for the pressure warning, it's probably expected if the tensioner suddenly loses all it's pressure. 

Yeah the cam will snap round because of the valve springs pushing on the lobes.

I can understand that the tensioner would loose oil pressure once extended, giving the pressure message, but it doesn't make sense with what happened in chronological order : oil pressure warning - really rattly but still running - cuts out.

The chain presumably snapped just before the engine cut out, so up until that point the chain would have been ok and kept the tensioner tensioned. So the tensioner can't fully extend (and give oil pressure message) until the chain has snapped - which presumably was the last thing to happen before the engine cut out.

In the video I push the tensioner up and down and it seeps oil around the shaft. I'm not sure if its supposed to do this, perhaps it blew a seal, pissed out oil, gave oil pressure warning, lost tension on chain, chain then snaps shortly after due to the lack of tension and the engine cuts out. That fits with what happened chronologically, but I've got no way of knowing for sure.

hope that makes sense

[Pesky jones]

Also wondering if my adjustor should be doing what its doing in the video

[rich83]

@dazza  will be able to tell you about the adjuster as he installed a new one.

[rich83]

I am not sure you should turn the cams with the pistons static, not sure how much valve clearance these have.

Have you tried tuning the inlet cam with the rocker cover off?

[Pesky jones]

The bottom part of my tensioner is also missing then. Must be in the head somewhere. I found the metal chunk which I highlight in the video but not the plastic bit underneath it. Hopefully it wont have got out of the head, seeing as that is what I will be replacing.

I think ill wait to see what @DANBOY66 's cylinder head condition is like, and then take it off his hands (let me know mate) 

@rich83 Nope havnt tried turning with rocker cover off yet.

[rich83]

Yep... you've defo got a fair amount of that tensioner plastic missing.

[dazza]

Adjustor looks fine its supposed to move like that.

[Pesky jones]

Cheers daz.

Im thinking now ive got to try and salvage as much as possible from this head depending on condition to transfer to new head. Ideally id like both camshafts, rocker cover, cam chain cover, hpfp etc. Should I look at cambelt kits?

Another thing to make things more annoying is I think im running out of time in the girlfriends garage lol. She lives at home and I think it might be starting to get at her parents. I do have a garage at mine but it is very tight either side of the car, unlit with no electricity and not the best ground. I could put it in there, but wouldn’t feel comfortable having it on axle stands. To replace head id assume id need to get under the car? Id happily work in there if I could do all the work from above.

[andy1979uk]

Have you sourced a  new head yet ?