Timing Cover / Water Pump Removal - Help!

Yes, the oil pan needs come off to access the back side of the oil and water pumps. Be careful, there is a hidden chain tensioner for the auxiliary chain that drives the pumps and it is fragile.

 

It's full of surprises... sometimes it feels like it's fighting you all the way.


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Which nut are you referring to ? The nut "28" has nothing to do with releasing the timing cover. Image Unavailable, Please Login

 

Here is what the back side of the pumps look like

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That's it. Don't forget about the chain tensioner hidden way up in there.

 

I actually have my engine supported from the sides instead of the end, so I was able to position it front cover pointed down when I was attacking the pumps. In fact you can see my shoe in the bottom right corner of my picture.

 

If you loosen both nuts you can slide the 2 sprockets of the shaft while pulling the oil pump/water pump case. They are different in diameter so keep the right sprocket at the right shaft.
If you think you'll have to go this far to replace that one small coolant hose between the water pump and the casing it is quite an 'interesting' design.

 

I just ended up replacing everything over there. Everything was (in my case) to good to be called worn out but to bad to put back in there.
I noticed the sprockets are really soft material and wear out quickly. I had most of the sprockets made new out of good quality material and had them nitrided for a good wear resistant surface.
Than the best quality chains, new guides and let's hope it will last a bit more miles than original.

I measured some original gears and the outside diameter of an identical gear was in some cases a millimetre larger in diameter than the other. They did not take that job to serious in the factory I guess.

 

I don't recall having any issues getting ours out. Unfortunately, I don't have any great pictures of the area. This is about the best I have...

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I had all the tensioners replaced by SF parts. I had some issues with them though, the small one was the wrong type and the big one was to wide, so after tensioning all front cover bolts I noticed it did not want to move. I told them about the issue so I hope they fixed it.
The bushings should just come out with some sort of puller system, but it took me half a day, they were really stuck in there and you only have M4? thread to work with...

 

For the chain, go for a Renold Synery 06B2 chain (sometimes also called Renold Black box chain). I installed a slightly cheaper Renold Blue though because i could not get the Synergy. I still have about 15ft of chain left.
I would not trust any unknown quality chain you might get thru one of the suppliers.

 

If you want I can also send you the length of chain needed from my 25ft of Renold blue chain. I have quite some left and would keep it in case I can use it for another one but if I can help you out with it.....