AboutJohn McInnis Expertise Land Rover Discovery.
I've had most of the common mechanical failures, altenator, water leaks, wiper failure, door/hinge problems, roof rust, floor rust, loads of electrical problems. Remember, I'm not a dealer or a mechanic, just an owner like most of you.
Experience
Experience Owner of a Discovery. I've had many mishaps with our Disco but I still like this vehicle. Talk to a fellow LR owner instead of a dealership rep. I'm not in this for the money. I'm just an owner who wants to help others.
Question I have a disco 1 that taps at warm up. it is hard to pin point, it is loudest at passenger side fender well. the exhaust does have a leak on this side but it goes away at warm up. i have listened to all the lifters they sound good. it is when i stick a screwdriver between the starter and the block from underneath, i hear the noise there inside the block. i did a recent engine flush, and some think the oil pump pickup may be clogged, some think the cat is making noise. when you listen to the exhaust, all i hear is exhaust sound, no extraneous noise. no lights are on on the dash. i am going to remove the oil pan, i have no idea what i will be looking for, i figure there is a screen for the oil pickup that i can scrape gunk off of? what else do i look for, and do you have any ideas how to better diagnose? 128000 miles 4.0 engine. thank you in advance!
Answer Hi John,
Could it be exhaust crack/leak, rockerarm or loose bolt(s) on a pulley? Did you know that sticking exhaust valves are a common problem with Disco's?
Worst tapping noise I would ever suggest is a loose cylinder liner - that spells new engine or complete rebuild.
Oil pump pickup can get fouled and screen is easy to scrub clean but I'm not sure it would cause noise.
