All Things Mk5 > Mk5 General Area
URGENT oil pressure stop engine
pudding:
--- Quote from: Peskyjones on March 17, 2016, 08:40:05 am ---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?
--- End quote ---
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:
--- Quote from: Pudding on March 17, 2016, 11:41:33 am ---
--- Quote from: Peskyjones on March 17, 2016, 08:40:05 am ---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?
--- End quote ---
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.
--- End quote ---
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?
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