PeachParts Mercedes-Benz Forum - View Single Post

Dinosaur · #5 01-29-2004, 12:41 PM

Peter,
Thanks for your input.
This vacuum pump is the one that fails without notice and pcs. fall into the block. I had searched on the forum and found that some owners had had this problem. MB designed a replacement gasket that is intended to keep the pcs. out of the block. When I pulled the old vacuum pump that appeared to work fine, I noticed that the bearing was stiff. 127K miles it was probably ready for a change.
I bought a new vacuum pump and the installation instructions said to add 50ml of engine oil in the inlet as soon as the engine starts, then immediately connect the vacuum line. ( regarding the gasket update, I first just tried to buy the updated gasket twice and both times I was sent the original type. When I removed the old pump and noticed the bearing was stiff I ordered a new pump and it came with the updated gasket.

I think what you ment was a depressurized chain tensioner. I have the CD manual and it shows that the tensioner must be pumped up with oil before inserting. It does not indicate if the tesioner can be rebuilt. I did notice the chain was loose both where the vacuum pump was attached and also at the cam gear while I had the valve cover off.
I will remove the valve cover again and check the chain stretch and tensioner. I had to remove the timing indicator when I replaced the water pump. I marked it and tried to set it in the same stop. How else can I fine TDC?

I only changed the o-rings on all the clear fuel lines, prefilter and filter. I will look at the CD regarding the IP and check for o-rings and washers(the IP seems to be leaking from some where.) The funny thing is this car ran smooth and fast when I first bought it, but it leaked also leaked a lot of fuel. The two plastic pans that I removed under the engine and transmission were soaked with fuel and trans fluid.
Again I appreciate all your help. I will start on these suggestions when it warms up some.

Thanks,

Mike