Thread: Intermittent Td5 tapping is back and louder!

I don't know the answer... but I'll bump your post up just in case someone else does..

*bump*

Are you sure it is engine noise?
The R380 gearbox is renowned for getting a tinny sounding rattle at certain speeds, in 4th & 5th and under load. Just another suggestion. Must be something to do with how the stick sits in the gate. My Defender does it at 80-90kmph in 4th and 90-100kmph in 5th.
My RR and Disco both had R380s used to do it as well. Can be quite annoying at times.

I'm surprised driving a Fender you can even distinguish a new rattle.
I'd be more worried that if the rattle went away, something's actually fallen off!!!


Using Capitals, the difference between helping your Uncle Jack off a horse or helping your uncle jack off a horse...

You said under load?
Maybe leaking-cracked exaust manifold?
Mine sounded like a dead-dry-crazy spining bearing...

Symptoms do point towards an exhaust leak, warped or cracked manifold, buggered exhaust gasket...my Isuzu has a terrible under-load tappety-tap-tap but after checking tappet clearance it turns out it's a gasket leak, under the manifold so evidence is hard to see.

100% certain that it's not gearbox or exaust as it's a metalic tap that is internal. (nearest thing that sounds similar is striking two teaspoons against the rim of a tin of dog food in time and fast!!!)... When running at a constant engine speed the 'tapping willl come lightly at first then get louder after a few seconds. Not being game to keep the throttle down, I back off. The tap stops instantly and will usually not come back when re applying the throttle. Being an Ag Engineer, I know my way around diesels, and having had the head off this vehicle soon after I bought it (it tapped several times before head removal), I've had the cam, followers and injectors out. One injector has been replaced. I'm 90% certain it's an injector or hydraulic follower but wanted to see if anyone has had the same prob b4 I order 10 hydraulic followers! Thanks!!

I would not pull it apart unless I was 100% sure it was engine noise,
you could put it on a dyno to simulate the load @speed & listen for the noise with a stethoscope etc ,

At say 2000RPM, each cylinder would be rising 33 times a second.

IMHO This does not qualify as a "tap" ,as it would be more a "buzz", so I would be looking at something going a lot slower, like something after the diffs.
Regards Philip A