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I've been having issues with an oil leak down the front of my engine when running . I am 100% positive it is not the head gaskets or valley pan (sanded flat and sealed). I was looking around my oil pump and found a spot where the oil pooled and appeared to be foaming? It is on the edge of the oil pump and the thermostat cover. Is the foaming/bubbling a sign that the leak is off the oil pump?
2nd I have a rather annoying whine near the bottom front of the engine with occasional ticking? Timing belt is not over tensioned, taking off serpetine belt makes no difference Please see the video. Any word on this?
That oil leak looks like the oil pump is leaking. I have found that sometimes the oil pump bolts, while appear to be tight..are in fact loose.
That whine sure sounds like the timing belt is too tight. I have an 1997 Audi Avant that the PO had just serviced..and the timing belt was too tight. I doubt he had the correct tool for holding the camshafts and that timing belt was singing like yours too. Impossible to adjust the timing belt timing or tension correctly without the tool. Also your timing belt tensioner pulley looks like someone has been jamming it around and the allen slot is a mess. I would replace it.
You can try and remove the timing belt (get the correct tools if you don't have them) then get to your oil pump cover and loosen then re-tighten the 10mm head bolts on the cover..one by one..see if that helps. If that does not work you will need to pull the oil pump cover and replace the gasket..a tedious job.
Here is a picture (thanks handsofftheaudi) of the oil pump cover..you can see the 10mm head bolts. In particular the bolts at 10 o'clock and 2 o'clock..but do them all. If the timing belt has been run too tight..you can see how the oil pump cover may get overly distorted..the belt tensioner is right there.
If you don't have the timing belt tool..look at the Bay. About $30. You will need to get a puller for tor removing the camshaft gear wheels..on a Cabriolet you will need a shallow two or three leg puller. Not much room but easy enough. See the link:
That oil leak looks like the oil pump is leaking. I have found that sometimes the oil pump bolts, while appear to be tight..are in fact loose.
That whine sure sounds like the timing belt is too tight. I have an 1997 Audi Avant that the PO had just serviced..and the timing belt was too tight. I doubt he had the correct tool for holding the camshafts and that timing belt was singing like yours too. Impossible to adjust the timing belt timing or tension correctly without the tool. Also your timing belt tensioner pulley looks like someone has been jamming it around and the allen slot is a mess. I would replace it.
You can try and remove the timing belt (get the correct tools if you don't have them) then get to your oil pump cover and loosen then re-tighten the 10mm head bolts on the cover..one by one..see if that helps. If that does not work you will need to pull the oil pump cover and replace the gasket..a tedious job.
Here is a picture (thanks handsofftheaudi) of the oil pump cover..you can see the 10mm head bolts. In particular the bolts at 10 o'clock and 2 o'clock..but do them all. If the timing belt has been run too tight..you can see how the oil pump cover may get overly distorted..the belt tensioner is right there.
If you don't have the timing belt tool..look at the Bay. About $30. You will need to get a puller for tor removing the camshaft gear wheels..on a Cabriolet you will need a shallow two or three leg puller. Not much room but easy enough. See the link:
Thank you.
I can turn the belt 90 degrees pretty easily at the specified point, so im not sure the belt would be overtensioned, i did the timing belt around 2 months ago using the correct tools. The belt tensioner is only thrashed on the surface, the inner part is fine.
Once i do it again to tighten the bolts i will check for the noise.
That is a good plan. I would use a new timing belt with a new tensioner too.
Be sure the cam wheels are loose..not too loose..but free to spin when you do the belt tension check (with the cam tool installed)..if they hang up on the taper..it will never be correct..same thing if they are too loose. The cam wheel bolt should be about one or on and half turns out when doing the tension check. The camshaft sprockets must be loose enough on the tapered ends of the shafts so that the camshafts can still be turned, but sprockets do not tilt out of alignment.
Once you have adjusted the belt and tightened up the cam bolts..then remove the timing bar..it is very difficult to check the belt tension..the camshafts will load and un-load the belt..and it will feel loose or tight in weird places. Go by the book. Get a Bentley if you can.
I have found that 90* twist to be a little too much too. A little less than that with the modern belts...
Use a 8mm allen to adjust the tensioner. Righty tighten belt, lefty loosely belt.
Did you use the cam tool? Camshaft wheels loose and not "tilted"?
Could be the missing bolt fell out and is stuck back in there or damaged your timing belt?
I ask because it sure sounds like a timing belt singing..not much else unless the water pump bearing, or tensioner(s) bearings are shot.
'
New water pump, tensioners and pulley as of 1000 miles ago. Belt is in new condition too.
I think i removed that bolt 6 months ago and forgot to put it back in for whatever reason.
Camshaft wheels were spinning and on just tight enough to prevent tilting, i did use the crankshaft and timing belt tools.
I plan on redoing it in a week or two to loosen the tension a little more.
Glad you found the bolt was missing. Probably you feel much better i bet for the easy fix
On the whine - my car had same whine but a little bit more quiet 3 years ago when i bought it. A german service shop in Chicago replaced the timing and i am pretty sure they didnt use the camtool as later I found the timing is not precise and the engine has constant vibrations at 2000 rpm. Anyway they put new water pump and the roller and tentioner - the whine Dissapeared immediately.
So maybe you need to check the rolelrs and tentioners..or maybe the waterpump..who knows?! New parts doesnt mean 100% non defective.
Is your AAH with the longer cerpentine belt or its updated?
It sounds like you are tensioning correctly, but this is the correct procedure to be sure:
The order this is done in is as follows...
replace belt
route it properly
put cam lock tool back
tension the timing belt properly
tighten the cam sprocket bolts
remove cam lock tool.
if you have the cam sprocket bolts tightened and the cam lock tool on when you try to tension the belt you will only tension the portion from the crank bolt to the one cam sprocket
the part in orange here...
<a href="http://s146.photobucket.com/albums/r259/grillage/?action=view¤t=tbeltpicwrong-1.jpg" target="_blank"><img src="http://i146.photobucket.com/albums/r259/grillage/tbeltpicwrong-1.jpg" border="0" alt="Photobucket Pictures, Images and Photos" /></a>
make sense? the sprockets need to be able to rotate on the shafts while you are tensioning or they can't tension the belt evenly.
05-19-2016, 06:35 PM
Cab oil pump leak and whine
