Thread: Whining noise

Originally Posted by FisherX

It sounds throttle dependant and sounds like a sucking noise.

Air leak in the intake track linked with vacuum, noise disappears on boost, maybe.

Could be the old vacuum brake booster check valve oil leak, and mine could be heard when facing downhill, but was more of a gurgle.

Hi Veebs, I'm sorry to say that I have the exact same issue and now know what the cause is. The noise stems from your exhaust manifold RHS bank. The common concern is that the studs holding the manifold on the head break off, usually the the last one or two studs, closest to the firewall. Myself and an Indi spent a few hours yesterday on my vehicle diagnosing the same, coupled with several hrs of research we came to this conclusion. Its a body off process, though I'm sure there are some brave souls out there that would attempt the manifold gaskets in place.

I'm due to do mine in the next week or two,

All the best

Originally Posted by Anton

Hi Veebs, I'm sorry to say that I have the exact same issue and now know what the cause is. The noise stems from your exhaust manifold RHS bank. The common concern is that the studs holding the manifold on the head break off, usually the the last one or two studs, closest to the firewall. Myself and an Indi spent a few hours yesterday on my vehicle diagnosing the same, coupled with several hrs of research we came to this conclusion. Its a body off process, though I'm sure there are some brave souls out there that would attempt the manifold gaskets in place.

I'm due to do mine in the next week or two,

Hi Anton, Let us know if this fixes the problem, and Veebs, If you get the same diagnosis and what the result is?
Thanks guys.

LesH.

Well, same diagnosis. The indie here heard the video and immediately diagnosed as snapped bolts on the exhaust manifold. They’ve seen 3 or 4 of these now.

Depending on which end (to be confirmed) this is a body on or off job. If they can access the broken bolt with the body on, it’s drill it out, thread a fresh one in and tighten. With my run, I’m expecting the body to need to come off though :-(

No price as yet, as the big boss wasn’t in when I got there, but bracing myself…

Sorry to hear that veebs, any clue as to why? Did the recent manifold job requite the header bolts to be touched?

Everything a cinch with body off

Top Tip is set the chassis on jack stands so the top lines up perfectly when you drop it down.

Hard to believe it’s still driving with a knock like that

Land Rover Discovery 4 3.0 Engine swap - YouTube

Good time to start a "While I'm there" thread

Originally Posted by Eric SDV6SE

Good time to start a "While I'm there" thread

That plastic block coolant fitting

Rear timing belt

Air con pump

Turbo/s

Manifolds / EGRs

Rear park brake