cgclassics
Craig
I have bought a pair of Gurney Eagle rocker covers from Andy at Tornado, but am having some issues fitting them. I would have thought this is something that others have come across and solved so asking here.
The car has basic Edelbrock aluminium heads (standards valves) and 1.6 rocker arms. The original rocker covers on the engine were polished aluminium standard Ford Racing covers which fit fine without interference with the rockers. I went to fit the Gurney Eagle covers but cannot get the bolt holes to line up with the head without the covers touching the rocker arms. It’s not a height issue and the inner width of the Gurney Eagle covers is exactly the same as the Ford Racing covers, so it is not as if they are narrower. On looking closer it’s the relative location of the bolt holes compared to the side walls on the cover that is slightly different such that if the bolt holes were aligned with the head holes, the cover walls are a couple of millimeters displaced to the outside of the block compared to the Ford Racing covers and contacts the rockers.
The relative hole spacing is all fine and the same as the Ford Racing covers. As it’s not a height thing adding another gasket made no difference and I can see inside through the oil breather hole that the problem is the side wall relative location.
Obviously I could drill the holes in the covers out to move the relative location of the cover, but I’m not sure that’s a great idea given it’s 1.5-2 millimetres we’d need to move, but maybe that’s what others do? Similarly I could ease the wall on the inside with a grinder, but it seems a lot to take off and I think the wall would get perilously thin.
What’s the trick to get over this?
Thanks
Craig
The car has basic Edelbrock aluminium heads (standards valves) and 1.6 rocker arms. The original rocker covers on the engine were polished aluminium standard Ford Racing covers which fit fine without interference with the rockers. I went to fit the Gurney Eagle covers but cannot get the bolt holes to line up with the head without the covers touching the rocker arms. It’s not a height issue and the inner width of the Gurney Eagle covers is exactly the same as the Ford Racing covers, so it is not as if they are narrower. On looking closer it’s the relative location of the bolt holes compared to the side walls on the cover that is slightly different such that if the bolt holes were aligned with the head holes, the cover walls are a couple of millimeters displaced to the outside of the block compared to the Ford Racing covers and contacts the rockers.
The relative hole spacing is all fine and the same as the Ford Racing covers. As it’s not a height thing adding another gasket made no difference and I can see inside through the oil breather hole that the problem is the side wall relative location.
Obviously I could drill the holes in the covers out to move the relative location of the cover, but I’m not sure that’s a great idea given it’s 1.5-2 millimetres we’d need to move, but maybe that’s what others do? Similarly I could ease the wall on the inside with a grinder, but it seems a lot to take off and I think the wall would get perilously thin.
What’s the trick to get over this?
Thanks
Craig