Discovery 2 Noises - Not Serious, But Would Like To Identify? Help Please!

[rjsdavis]

Dear all

I have two noises and another separate quirk that I am trying to identify in my Discovery 2 TD5 (1999) with an auto box;

1 - When moving off from the stationary, there is a distinct "hiss" which is related to the throttle and throttle use. If moving off from stationary, it will last about 1-2 seconds and then disappear. It won't come back unless I idle and lose speed, and then use the throttle again - when it will briefly (less than a second) re-appear, or if I go back to a full stop and start off again. Should it do this? My 300 Tdi never made this turbo hiss type noise!

2 - When moving at low speed and higher torque, i.e. moving up a hill slowly, there is a rattle coming from underneath the car. It only happens between 1750 & 2500 revs, and only at low speeds. It does happen in the same rev range on the flat, but is less noisy. It dissipates largely when the car is very warm, and has been running for 30 minutes or longer. Any ideas?

3 - Just a ****** - she can sometimes be slow to change up properly to 4th gear. She should move upto 4th at about 55mph, and will should drop down to about 2,000 revs. However, whilst she is cold, she will change up, but the revs only drop down to just below 3,000 revs. It can take anything between 10 - 25 minutes before she is warm enough to fully drop down in revs at 55-60mph. Any ideas?

Thanks so much in advance to anyone kind enough to reply.

Richard

 

[swrye]

I had "sort of" the same problem. It turned out to be that one of the nuts came off of the heat shield for the muffler and the muffler was vibrating against the heat shield. Might solve both 1st and 2nd question. Not sure about the 3rd.

 

[rjsdavis]

Resolved!

For those that read this thread - all three problems have been identified and resolved (well sort of!)

1 - Hiss was caused by a leak / crack in the flexi-joint on the old exhaust downpipe. Hiss has gone completely with the new pipe that has just been fitted.

2 - Rattle has been identified as also being the downpipe as I suspected. However, I got a replacement from a salvage specialist, and whislt it cured No. 1 - it still rattles (which you couldn't tell until fitted), therefore still have the torque rattle. At least I know what it is now though.

3 - Completely cured by filter a new transmission filter kit and new gearbox fluid. It will happily change up to final lock-out at 55mph, when still only a quarter of the way on the temp guage on the dashboard clocks - which is excellent news.

Anyone got a good downpipe for a non-cat TD5?

 

[fraguada1]

Check the universal joints for the front shaft. I had to replace one @ 50Kmiles. The problem is that land rover wants to sell you the shaft for $1200.00 claiming that need to be re-balanced. Bull crap!. If you can get somebody from the dealer to sell them to you they are $100.00 ea. If all three of them are bad then buy the shaft. Tricky job to replace them.