A new 12 vane cover arrived, but when I installed it, I found that there was absolutely no clearance between it (anywhere around it) and the block, when the bolts were done up finger tight.
According to "the book" an additional 10 to 25 thou in gasket width should be applied, "to attain the correct running clearance."
Well, if I have absolutely no clearance to add the 10 to 25 to, how do I know what the overall gap should be? HELP.
I'm not 100% happy with the quality of the cover because of this. Additionally the casting is so poor that it wont allow me to put a socket or a ring spanner on one of the bolts. I looked at using a Dremmel to grind a larger space around the bolt hole for the bolt head, but on inspection it appears that the wall is not thick enough to allow it. I even considered grinding down the bolt head to a smaller size so I could fit a smaller socket on it, but instead, I've ordered some Allen headed bolts.
Your advice on the cover clearance will be very welcome.
Thanks & Cheers,
You've modified it, so might be a bit late, but I would send it back and look for new old stock/salvaged on here. It will be better quality.