Mk1 strange noises

Anything related to Lotus Cortinas. (Open to the public.)

Moderator: LCR Members

Post Reply
sdenny
Learner Driver
Posts: 1
Joined: Thu 15th Feb 2018 9:56 am
LCR Membership Number: 0

Mk1 strange noises

Post by sdenny »

My brother in law has a very nice restored Mk1 that he's somewhat frustrated with. There's a funny noise. His description:
Metallic noise very easily heard but only in top gear but only between 3000 and 2,500 rpm on overrun. If the clutch is dipped or the lightest throttle load applied the noise disappears.
In summary car bought as a restoration project. Engine, gearbox and axle rebuilt by Lotus specialists. Three different diffs and propshafts have been tried. Two complete rear axles been used, drums balanced and half shafts swapped out and numerous thrust release bearings and carriers tried.
As you can see, he's tried lots of things to fix it - any body got any other suggestions as to what it could be?

Thanks in advance

Steve

ps I also have this posted on http://www.lotuselan.net, so if you've replied there, thanks very much
Rob
Woodrim
Posts: 1276
Joined: Mon 4th Dec 2006 1:00 am
LCR Membership Number: 2080
Location: Essex

Re: Mk1 strange noises

Post by Rob »

The bush in gear linkage often gives out a strange metallic buzzing noise
(Directly under gear stick)


Rob
User avatar
Keith Halstead
Moderator
Posts: 5028
Joined: Tue 28th Nov 2006 1:00 am
LCR Membership Number: 1711
Location: Essex

Re: Mk1 strange noises

Post by Keith Halstead »

Prop shaft UJ ?
User avatar
Pete G
Woodrim
Posts: 1518
Joined: Wed 6th Dec 2006 1:00 am
LCR Membership Number: 278
Location: W Essex
Contact:

Re: Mk1 strange noises

Post by Pete G »

Any idea where he noise is coming from, prop, rear axle, gearbox?
If it is only in 4th gear and none of the others whatever the road speed, it would suggest gearbox?
Post Reply