All Things Mk5 > Mk5 General Area
URGENT oil pressure stop engine
pudding:
Just been skim reading the past couple of pages and things sound OK to me. You're getting a squish sound every 2 crank turns (suck, squeeze, bang, blow - 4 stroke engine), which is compression. I did say remove the spark plugs if you want the engine to turn over easier, but the squishing confirms you've not got any bent valves and the fact it is turning over means it's not seized either :happy2:
Can you not see the conrods from the bottom without taking the oil pump / balancer / girdle plate thingy off? If you can, look for discolouration. An overheated big end bearing would make the rod turn a bluish colour. If they all look the same colour (brown from oil staining or gunmetal), move on.
What I would do is carry on as you are checking the timing and if it's good, just start it mate and see what happens. What was the VCDS error again? "Cam / crank correlation - set point not reached" by any chance? That would definitely indicate a chain related issue.
Pesky jones:
--- Quote from: Pudding on March 04, 2016, 10:24:38 am ---Just been skim reading the past couple of pages and things sound OK to me. You're getting a squish sound every 2 crank turns (suck, squeeze, bang, blow - 4 stroke engine), which is compression. I did say remove the spark plugs if you want the engine to turn over easier, but the squishing confirms you've not got any bent valves and the fact it is turning over means it's not seized either :happy2:
Can you not see the conrods from the bottom without taking the oil pump / balancer / girdle plate thingy off? If you can, look for discolouration. An overheated big end bearing would make the rod turn a bluish colour. If they all look the same colour (brown from oil staining or gunmetal), move on.
What I would do is carry on as you are checking the timing and if it's good, just start it mate and see what happens. What was the VCDS error again? "Cam / crank correlation - set point not reached" by any chance? That would definitely indicate a chain related issue.
--- End quote ---
Thanks @Pudding I think I will do. The error was P0011 - "A" Camshaft Position - Timing Over-Advanced or System Performance (Bank 1)
I think I have to remove a few bolts on the cover above the sump, and the crankshaft will be revealed. I'm not sure this is removing the oil pump, but im not clear on it. I'll check the conrods if i can and bearings for colouring and wear as you have said.
dazza:
--- Quote from: Peskyjones on March 04, 2016, 09:18:19 am ---How hard is to remove the cam belt upper cover Daz?
--- End quote ---
Should be one plastic screw flip it to open then pop it off. (if you have the old style cover).
Pesky jones:
Thanks guys.
Quick question - is the cam chain tensioner hydraulic or is it on a spring? My prediction is that when I take the cam cover off my tensioners going to have failed. Hence why im asking about how it does its job - if its hydraulic then could the lack of oil pressure potentially caused it to fail?
pudding:
It's hydraulic mate. It probably has a pre-load spring in it as well to help keep things taught during assembly, so the chain is unlikely to be loose and sloppy as you're expecting.
Two things usually happen with hydraulic tensioners, 1 - they run out of travel because the chain is worn out or 2 - they leak internally, which causes a pressure drop.
Tensioners with plastic pads can also wear down (the plastic bit) which also reduces it's tensioning travel.
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