Thread: V8 Rattle?

It sounds like you need to plug it in to some diagnostic equipment, like a Nanocom, Hawkeye etc. That could take some guess work out if it.

yep i agree with craig,no point throwing money at it.

I had a similar experience not long after my 4.0 rebuild at 147k kms.
Ticking noise, everyone told me it was the engine about to blow up!
Turned out to be loose exhaust flange bolts where it connected to the manifold down pipes. Added some spring washes, ticking solved.

Until another ticking/rattling noise started from the Disco. Only occurred when standing/idling but got worse when initially put under load and disappeared again soon after. Again, all the usual suspects came back with "your heads gone, time for another rebuild".

After a fair bit of time spent under the vehicle checking EVERYTHING, I found it to be a cracked stone cover plate behind one of the rear wheels. It was just vibrating against the adjacent part of the brake disc/hub assembly.

Don't always assume the worse. In my personal experience, too many people are too eager to point to major engine problems over smaller issues.

Just my 2c....

I had a rattle which was hard to track down. Ended up being the heat shield on top of the catalytic converter.

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Originally Posted by RSCHIPP

I had a rattle which was hard to track down. Ended up being the heat shield on top of the catalytic converter.

Oh yes, forgot about that other one, but mine was the shield over the big main exhaust box unit. Was there when I had my factory pipe on and all was fine. When I changed my exhaust system it was rattling, just removed it as no longer needed, all good.

Thanks for the memories Ron...!!

Thanks, I'll definitely check it all out when I change the manifold gaskets this week. I've ordered spark plug leads from Jag Spares in Victoria and some 2nd hand O2 sensors too. Was going to buy new, but was waiting on British Parts of Utah to get back to me. Didn't fancy spending $400 in the interim so hopefully they're good.

Will have to check to see what members around here have a Nanocom once that's done, fair call.

Originally Posted by Discotrip

Thanks, I'll definitely check it all out when I change the manifold gaskets this week. I've ordered spark plug leads from Jag Spares in Victoria and some 2nd hand O2 sensors too. Was going to buy new, but was waiting on British Parts of Utah to get back to me. Didn't fancy spending $400 in the interim so hopefully they're good.

Will have to check to see what members around here have a Nanocom once that's done, fair call.

Be prepared to loose some skin and make your offering to the blood gods when changing the plug leads... also make sure you have a pair of extended (angled at the end) long nose pliers. These help to get the ends out to the coil packs and are very useful when the connector comes away and is left in the coil pack... that wasnt a pleasant experience.
If you are going to remove the top section of the inlet manifold etc then disregard all the above.