Posted: Tue Jan 15, 2008 10:00 am
Vanquish,
Check the clearance of the pushrods to the holes in the cylinder head. They have been known to rub at certain postions during the valve lift cycle causing a squeaking noise not unlike the one you describe. You can also check the sides of the pushrods for evidence of 'rubbing'/shiney patches. Particularly possible if you have a higher lift after market camshaft fitted.
A known production issue even with standard camshafts due to core shift in the haed casting process.
Russ
Check the clearance of the pushrods to the holes in the cylinder head. They have been known to rub at certain postions during the valve lift cycle causing a squeaking noise not unlike the one you describe. You can also check the sides of the pushrods for evidence of 'rubbing'/shiney patches. Particularly possible if you have a higher lift after market camshaft fitted.
A known production issue even with standard camshafts due to core shift in the haed casting process.
Russ