Omega Owners Forum

Please login or register.

Login with username, password and session length
Advanced search  

News:

Please check the Forum Guidelines at the top of the Newbie section

Pages: [1] 2  All   Go Down

Author Topic: Question re. my Discovery  (Read 4434 times)

0 Members and 1 Guest are viewing this topic.

Crazycarzowner

  • Guest
Question re. my Discovery
« on: 29 March 2015, 20:32:08 »
Right, now then I know I've had a metallic tapping noise coming from the left bank of the Disco for a while, not really getting any worse but annoying. I've listened to it several times and it doesn't sound like a lifter but I can't put my finger on it. It doesn't do it at idle just on acceleration from about 1500 - 2000rpm, then goes away as and when the revs increase.

I'm thinking possibly a cylinder liner perhaps??? Only other thing I can think of. There are no other issues ie. using oil or water, temp gauge sits at normal & I'm at a bit of a loss really. I know I'll probably find out when I strip the engine, but I did plan on using it for a while until I purchase a Skoda replacement................When I eventually get the cheque  ::) ::) ::)
Logged

4x4

  • Guest
Re: Question re. my Discovery
« Reply #1 on: 29 March 2015, 20:43:01 »
Which engine is it?
Logged

Crazycarzowner

  • Guest
Re: Question re. my Discovery
« Reply #2 on: 29 March 2015, 20:49:19 »
3.9 v8
Logged

Andy H

  • Omega Lord
  • *****
  • Offline Offline
  • Gender: Male
  • Auckland
  • Posts: 5533
    • Mazda MPV
    • View Profile
Re: Question re. my Discovery
« Reply #3 on: 29 March 2015, 20:58:58 »
When my Range Rover makes that noise I tighten up the bolts between the exhaust manifolds and the heads and the noise goes away for a while.

Cast iron Rover manifolds are a bit fragile so I don't want to overtighten the bolts just in case........
Logged
"Deja Moo - The feeling that you've heard this bull somewhere before."

Nick W

  • Omega Queen
  • *****
  • Offline Offline
  • Gender: Male
  • Chatham, Kent
  • Posts: 11068
    • Ghastly 1.0l Focus
    • View Profile
Re: Question re. my Discovery
« Reply #4 on: 29 March 2015, 21:03:33 »
Pull the valve covers and check that all the valves are opening fully. Round camlobes on the rear cylinders are a fact of life with Rover V8s. But they hide it so well that it's hard to tell without a physical check.
Logged

Crazycarzowner

  • Guest
Re: Question re. my Discovery
« Reply #5 on: 29 March 2015, 21:31:30 »
Ohh!! that might be a good shout Andy H, I'll check them in the morning. Yeah Nick W I know what you mean about the cams, but the engine itself is quite low mileage 75k. Gonna try the fanimoulds first & go from there I think.
Logged

the alarming man

  • Omega Baron
  • *****
  • Offline Offline
  • Gender: Male
  • medway kent
  • Posts: 3644
    • disco V8
    • View Profile
Re: Question re. my Discovery
« Reply #6 on: 29 March 2015, 23:19:58 »
I would try the manifolds first as my old 86,000 v8 did it until I replaced all the gaskets...then saying that nick is right but always try the cheapest method first :y
Logged
'the more people i meet...the more i like the dog'

The whole problem with the world is that fools and fanatics are always so certain of themselves, but wiser people so full of doubts.

Marks DTM Calib

  • Administrator
  • *****
  • Offline Offline
  • Gender: Male
  • West Bridgford
  • Posts: 34021
  • Git!
    • View Profile
Re: Question re. my Discovery
« Reply #7 on: 30 March 2015, 08:09:22 »
Quote from: Jasonm on 29 March 2015, 21:31:30
Ohh!! that might be a good shout Andy H, I'll check them in the morning. Yeah Nick W I know what you mean about the cams, but the engine itself is quite low mileage 75k. Gonna try the fanimoulds first & go from there I think.

Cams and followers plus chain setup are normally pretty shot by 60K miles.

Check the exhaust manifolds first (there were some improved gaskets for them due to this issue)
Logged

Crazycarzowner

  • Guest
Re: Question re. my Discovery
« Reply #8 on: 30 March 2015, 14:25:51 »
Quote from: Andy H on 29 March 2015, 20:58:58
When my Range Rover makes that noise I tighten up the bolts between the exhaust manifolds and the heads and the noise goes away for a while.

Cast iron Rover manifolds are a bit fragile so I don't want to overtighten the bolts just in case........


Give that man a Mars Bar  :y :y :y :y :y :) :) :) :)


Had a look under the bonnet earlier this morning & 3-4 of the rear-most left hand bank of fannimold bolts were loose. Found the correct socket, prised the retaining flap off and nipped em all up! Runs quiet as a mouse now  8) 8) 8)

Thanks Andy H  :y ;)
Logged

Vamps

  • Offline Offline
  • Gender: Male
  • Bishop Middleham, Co Durham.
  • Posts: 24708
  • Flying Tonight, so Be Prepared.
    • Mig 2.6CDX and 2.2 Honda
    • View Profile
Re: Question re. my Discovery
« Reply #9 on: 30 March 2015, 21:15:17 »
Result.......... :y :y
Logged

Andy H

  • Omega Lord
  • *****
  • Offline Offline
  • Gender: Male
  • Auckland
  • Posts: 5533
    • Mazda MPV
    • View Profile
Re: Question re. my Discovery
« Reply #10 on: 30 March 2015, 21:29:51 »
Quote from: Marks DTM Calib on 30 March 2015, 08:09:22
Quote from: Jasonm on 29 March 2015, 21:31:30
Ohh!! that might be a good shout Andy H, I'll check them in the morning. Yeah Nick W I know what you mean about the cams, but the engine itself is quite low mileage 75k. Gonna try the fanimoulds first & go from there I think.

Cams and followers plus chain setup are normally pretty shot by 60K miles.

Check the exhaust manifolds first (there were some improved gaskets for them due to this issue)
It is true that the cam lobes can wear to almost nothing but they don't make much noise as a result. There is only one cam so a new replacement isn't ridiculously expensive.
Logged
"Deja Moo - The feeling that you've heard this bull somewhere before."

Andy H

  • Omega Lord
  • *****
  • Offline Offline
  • Gender: Male
  • Auckland
  • Posts: 5533
    • Mazda MPV
    • View Profile
Re: Question re. my Discovery
« Reply #11 on: 30 March 2015, 21:48:59 »
Quote from: Jasonm on 30 March 2015, 14:25:51
Quote from: Andy H on 29 March 2015, 20:58:58
When my Range Rover makes that noise I tighten up the bolts between the exhaust manifolds and the heads and the noise goes away for a while.

Cast iron Rover manifolds are a bit fragile so I don't want to overtighten the bolts just in case........


Give that man a Mars Bar  :y :y :y :y :y :) :) :) :)


Had a look under the bonnet earlier this morning & 3-4 of the rear-most left hand bank of fannimold bolts were loose. Found the correct socket, prised the retaining flap off and nipped em all up! Runs quiet as a mouse now  8) 8) 8)

Thanks Andy H  :y ;)
You're welcome. :y
Logged
"Deja Moo - The feeling that you've heard this bull somewhere before."

TheBoy

  • Administrator
  • *****
  • Offline Offline
  • Gender: Male
  • Brackley, Northants
  • Posts: 107048
  • I Like Lockdown
    • Whatever Starts
    • View Profile
Re: Question re. my Discovery
« Reply #12 on: 31 March 2015, 18:16:02 »
Sometimes, OOF manages to surprise me. Great news :y
Logged
Grumpy old man

Crazycarzowner

  • Guest
Re: Question re. my Discovery
« Reply #13 on: 31 March 2015, 19:10:15 »
Its certainly the best forum for help regarding any vehicle, as well as the Omega. I'm a member of the Discovery club & posted the same, still had no replies yet!!!
Logged

Marks DTM Calib

  • Administrator
  • *****
  • Offline Offline
  • Gender: Male
  • West Bridgford
  • Posts: 34021
  • Git!
    • View Profile
Re: Question re. my Discovery
« Reply #14 on: 01 April 2015, 12:14:32 »
There are some improved manifold gaskets, have fitted them to two TVR's (which suffer this issue far more due to the swept manifolds)
Logged
Pages: [1] 2  All   Go Up
« previous next »
 

Page created in 0.013 seconds with 17 queries.