Thread: Strange noise from V8 engine - Video attatched!

you could also just run it without the covers - look at the rods and watch the rockers, you should be able to pick up any major problems.

The lobes wear heaps and quick on the 3.5 /3.9 engines, as do the lifters. you'll see the missing lift - if thats the problem.

here's a stab in the dark, it might be worth packing your oil pump with vaseline, in order to re-prime it, it doesnt take very long, can be done in about 20 minutes or so

my engine had lost its prime after not being started for who knows how long (it was out of an old rangie that had been sitting around for years) and once fired up made a noise pretty damn similar to yours, it ran fine, well it idled fine, i wasnt keen to drive it

but after packing with vaseline, the noise faded away in about 10 seconds of running

maybe its worth a try

Originally Posted by Psimpson7

suggested that maybe something is lose in a bore (maybe I dropped a bolt in

Peter ... would not be the first time this has happened .... and not my idea of fun

A dropped bolt / socket? could also be hung up on the intake valve side ....

Pull the plugs and then rotate the crank ... Grab a wire, and as each piston comes near the top ... Push the wire inside and swish it around to feel for any objects

Have you done the "rubber hose stethoscope" to locate the exact position yet?

Mike

I'm very close to someone that dropped a carby screw down a Chev V8 a long time ago. It sounded like the dark lord himself was trying to escape from that engine. We managed to retrieve it out the plug hole with a magnet on a flexible shaft. Of course it was the second last cylinder we checked!!

My money's on a main bearing. Again, it's that metallic hollowness of the noise I don't like.

ouch, I hope one of your liners have not come loose.

Originally Posted by jazzaD1

here's a stab in the dark, it might be worth packing your oil pump with vaseline, in order to re-prime it,

But wouldn't the oil pressure lamp be on all the time?

I had a RR that when I changed the oil filter would not get oil pressure again unless I completely filled the filter with oil.

Sorry to say it does not sound anything like the noise mine made when a cam lobe / lifter
went. I had the smallest of nicks out of the cam and it sounded like a fast high pitched tick, tick, tick, no where near as deep and throaty as yours.

Heard something like this on the forum before. When you park an engine for a few months sometimes a big chunk of carbon breaks off the head and jams in the squish zone at the lower edge of the combustion chamber. Removal methods include a good thrashing or a head off and decoke.