All Things Mk5 > Mk5 General Area
[SOLVED] Low oil pressure at idle
OllieVRS:
Got to taking the cam chain cover off, had to improvise to get the bottom T30 put as my normal bit wouldn't fit :grin:
I didn't find anything suspicious, everything looks normal. Tensioner still tensioning. Oil control rings are perfectly intact.
Of note are the cam lobe and cam follower, both of which have a little wear.
The cam follower was replaced 11k miles ago, with FEBI one off Amazon. Keep in mind the last 3k miles have been at sub spec oil pressure, this may have accelerated it's wear. I assume it needs to be replaced?
Contrast this with the one I pulled out 11k miles ago, with an unknown mileage:
And also the cam lobe 11k miles ago, which doesn't like like it changed much in that distance.
You make a valid point @Pudding . But the metal shard was 11k miles ago, long before the clutch issue. The clutch issue actually began after a failed 3k rpm clutch drop, where I forgot to put the handbrake down. Painful, I know.
I dropped the sump 6 months after the initial drop, and found no more metal shards. So I doubt that's the thrust bearing.
But I gotta drop the sump before jumping to conclusions, as I haven't had the chance to get it jacked up yet. I hope there's a glaring answer in there, waiting for me.
EDIT: FEBI cam follower is €30, while OEM cam follower is a mind boggling €67 from VW :confused:
pudding:
Ah OK, I thought those pics were the current situation!
67 for a cam follower!!! :surprised:
OllieVRS:
Replaced pick-up pipe (barely anything on it, slight dirt in the sides), installed VIS freewheel, new filter and Mobil 0W-40. No loose objects in sump, just a little dirt. Balance shaft ends weren't loose.
Retested oil pressure, gave engine a good while to warm up, 90 degrees and then another 10min.
Hot idle, still at 0.8 bar. May have increased by 0.05bar, but it's negligible.
2000rpm: 51psi
3000rpm: 57psi
Both are well within spec.
Video of RPM test:
Also changed out the PCV for the oil one, yielded identical pressure.
What to do next? Is this oil pressure acceptable?
Cheers :sad1:
OllieVRS:
Email from Wasamotor:
I would prefer to definitively find the issue before sinking more money in to iy, and Wasa weren't so helpful with their response in that regard.
How do I check the oil pressure release valve has failed on the oil pump?
EDIT: Found a thread on Audizine, it's a gold mine for information on this exact issue.
https://www.audizine.com/forum/showthread.php/942266-Absolute-Taint-Punch-Low-Oil-Pressure-on-Freshly-Rebuilt-2-0-FSI-Input-Needed
OllieVRS:
Tested with old oil pressure gauge, identical results.
Interestingly, the oil pressure is at 20 psi at 850rpm when hot. That's a big jump from the 12 psi at 720rpm. Tempted to just raise the idle rpm in VCDS, but I think that's a foolhardy solution.
Compression is still alright, only checked Cylinder 1, first try 175psi, second 160psi. Hot and WOT.
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