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[VintageLambo] Re: Urraco Blog #3

Mike Dodge

The problem is obvious: > The doofus who put it together 14 years ago mis-timed the cams, > causing a valve-piston collision somewhere in the vicinity of > cylinder No. 2. Hi George, It was not nessessarily put together timed wrong, but it is just as likely that the belt has jumped when trying to start the engine the first time after the re-build! The workshop who overhauled the engine in my Urraco did just that when trying to start the engine before my ownership. The cam belt tension is critical and it is actually quite difficult to set the belt tension pulley stop bolt to the correct clearance. I was told by an experienced tech in the UK to set the clearance to 1mm maximum on a new belt and to weld up the spring groove on the swiveling pulley to increase the tension on the belt. If the motor is turned over with a new belt the pulley can move away from the stop bolt several mm"s and then back again! I set mine at 1mm when it was at its widest point and i checked it every few thousand miles ( not an easy job to check either!!). I also modified my timing covers so that they could be removed and the belt changed with the engine in the car. Another way to remove a stuck cluth/brake piston is to use a grease gun and pump grease in to the cylinder which then hydraulically forces the piston out of the cylinder! It can be a bit messy but it does work and you can get a lot of force from a grease gun several tons most likely. Cheers Mike