Update on the tapping noise. I decided to strip the engine today and have found nothing obvious. Rockers and shafts seem fine, engine is clean inside with no sludge or black build up. Followers are in mint condition as are the cam lobes. The only cause for concern is the fact that the inlet manifold bolts were all hand tight, I didn't need the ratchet to undo them, just used the extension bar and socket.
I have only inspected the cam through the gaps and haven't removed it, nor have I yet removed the timing cover. I really don't know where to go from here and am really reluctant to put the engine back together with all the expense involved in buying new gaskets having not found the problem.
Any advice of what else to look for would be really appreciated.
I know on how you feel, i have the same problem! But mines a Disco V8 3.9 EFI Sagem
My engine has done around 180,000 K’s, oil changed ever 5,000 k’s, light brown tarnish looking through the rocker cover, been ticking for about three months now.
Replaced manifoilds / exhaust as part of an upgrade I had already planned, new gaskets made sure they were the right way around etc.
Still ticking, only when HOT! Changed from mineral 20/50 to 10/40 semi-synthetic Castrol Magnatec oil, but before that gave the engine a good flush to remove any loose bits of carbon that might have trapped around the lifters etc.
It never ticks while it’s cold thou, what do you reckon valve gear, slapping around?
My local garage told me to use an additive, something called resolve, none too keen on chucking additives in the engine.
I also have a huge amount of carbon build up inside the exhaust, when you wipe the inside it falls off, even blows out soot at start-up even when you floor it the cloud of clag that comes out the back is visible more at night in car headlights.
It’s not burning oil, oil level never changes.
Any ideas?
