Viva GT Cam belt (yet another part ..)
So the on-going story of fitting the new cam pulleys and cam-belt continues.In my last post I talked about locking the stud into place and the plan to fit everything back together. Ive had a few down days due to sinus issues so it taken a bit longer than I envisaged.
So the stud was removed from the block and the thread checked as best I can and lots of locktite applied and it was wound into place (that was middle of week). A few days later, Saturday to be precise, I assembled the Cam-belt and faffed about for about an hour to get the timing right on the belt and pulleys, so that I also had good tension in the right places. It’s one of those come into the house and do some research on youtube on how to time up a Lotus 900 series engine. Then go back out try it, come back in watch the video again and check a load of forums / Lotus Workshop manuals. Then do it all over again (and again) until I am happy its right. Once that was done it was fit the belt tensioner onto the 10mm stud and adjust it to take up the slack on the top part of the belt. Everything went well, and I was able to rotate the engine round a few times till I was back to TDC and everything is still in time.
At this point I started the fitment of the crank position sensor and found that when the fan belt was in place it fouled the bracket. I double checked the sensor was in the right position, then realised that I would need to shave the bracket. The design appears to be for twin pulley engines (where air con or powered steering are fitted) but as I only have a single pulley it fouls the single belt.
I estimate all I needed as a few MM off the bracket would be fine. Luckily for me even on a Saturday I have access to local companies who do machining, so I popped over to Jims, had 5mm taken off the side of the bracket, and returned home to trial fit it. Bugger needs another 5mm, so a return trip, another quick Mill and I was back at the house again this time to fit the bracket which cleared the belt with room to spare. See I don’t follow fashion, measure once cut twice is the new black (Chod). I was very lucky as Jim normally goes around 12 noon if there is a good football match on, luckily he was still there the second time as no decent games were on (in his opinion).
In the above image we can see the bracket is now clear of the fan belt, and apart for ensuring the connector and wire are routed away from the moving parts all is now set as it should be.
Jobs for today are to centralise the cam-belt on the pulleys as its too far back at the minute, rotate the engine a few times over to see how it runs on the pulleys and adjust the tensioner angle as needed (big big job). Then tighten and torque up the bottom pulley to 60pounds.