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Slim

Member Since: 08 Jan 2013
Location: Wales
Posts: 9

2007 Defender 90 Puma 2.4 HT Tonga Green

Could a faulty injector...

Hey guys,

My Defender has developed a knocking sound. It started as a tapping sound under load 2,500/3,000 RPM, normally up hill. The noise seemed to develop from a tapping sound to a knocking sound over the course of a few miles. I thought it might have been the Pilot/Spigot Bearing or Clutch as I had just changed them both. So, I decided to opened it up to see if anything was amiss. All was in order, so it went back together. I then drove around two miles before the sound got so bad I had to stop the engine. It sounds as if the big-end has gone.

I have been told by my local Land Rover Specialist that a faulty injector could make my engine sound as if the big-end has gone. Is this possible?

The sound does seem to be coming from the back of the engine.

This post follows on from my post ''Pilot Bearing Issue''

Thanks in advance.

Liam

16th Jan 2013 9:50pm

Caterham

Member Since: 06 Nov 2008
Location: Birmingham
Posts: 6298

2011 Defender 110 Puma 2.4 XS CSW Stornoway Grey

Liam

I hope you get sorted. the only advice I can give you is it would appear my heat shield has been causing me a load of grief. Probably nothing to do with your issues but all I can say is for the sake of a few seconds makes sure the whole of the turbo heat shield assembly is secure.

good luck

16th Jan 2013 9:58pm

Slim

Member Since: 08 Jan 2013
Location: Wales
Posts: 9

Caterham,

During the clutch change the down pipe/cat came off and back on. The bolts are all present and tight.

Thanks though!

16th Jan 2013 10:05pm

Dieselhead

Member Since: 21 Oct 2012
Location: Pulborough. West Sussex
Posts: 552

Injectors can knock badly if faulty

Trouble is you dont know which one it is with out correct test equipment Chris

2008 XS 110 2.4 Utility. Tonga Green
1953 Series 1 for restoration
1983 Mini Mayfair
2004 VW T5 Camper
2008 Diahatsu Sirion. Thats hers
Classic Bolens Garden Tractors

17th Jan 2013 5:14pm

barbel jim

Member Since: 12 Dec 2012
Location: Northants
Posts: 1419

Quick answer is yes - Do you get it at other times ie starting from cold (that was when mine was most noticeable)

17th Jan 2013 5:25pm

Slim

Member Since: 08 Jan 2013
Location: Wales
Posts: 9

WOOOOOOOOO HOOOOOO! Sorry, can't contain myself!

Short story, No3 and No4 injectors were loose, and bouncing up and down. Tightened them down and all is good.

So be aware!

Thanks for the tips guys.

Let there be snow!

17th Jan 2013 10:30pm

Dieselhead

Member Since: 21 Oct 2012
Location: Pulborough. West Sussex
Posts: 552

Thats worrying but it is a Landrover

Good you sorted it

Chris

2008 XS 110 2.4 Utility. Tonga Green
1953 Series 1 for restoration
1983 Mini Mayfair
2004 VW T5 Camper
2008 Diahatsu Sirion. Thats hers
Classic Bolens Garden Tractors

18th Jan 2013 7:12am

Caterham

Member Since: 06 Nov 2008
Location: Birmingham
Posts: 6298

slim,

great news that its sorted. I'm sure I don't have the same problem however I've got to the point that I want to check everything I can.

was tightening the injectors as simple as it sounds?

21st Jan 2013 10:15pm

Slim

Member Since: 08 Jan 2013
Location: Wales
Posts: 9

Hi Caterham,

Cheers, I'm well pleased.

I didn't tighten it myself but I believe that it is one 8mm bolt per 2 injectors. If you remove the plastic cover then it should be obvious. Be careful not to over tighten them though as the head will be made of alloy. Hope you find the root of your problem soon.

Cheers.

22nd Jan 2013 6:34pm

General Lee

Member Since: 09 Feb 2013
Location: Grahamstown
Posts: 19

2008 Defender 110 Puma 2.4 SW Bonatti Grey

On my way to check my injectors........but gents,I have similar noise coming from the engine.But as soon as I engage my clutch(step on the clutch), the engine runs lovely.Engine also seems to run good on a cold start.

20th Feb 2014 6:16am

munch90

Member Since: 26 Oct 2013
Location: guildford
Posts: 3558

should really fit new copper washers on the bottom of injectors and have the injector sets checked , esay to remove injectors . if seats are damaged you may need I seat cleaner its like a long reamer bit like a water tap washer reamer .only needs normally a couple of turns to get good seat back .

if there blowing they can build up carbon under the washer and will never seal 100% just by tighten down

if there quite loose you get misfire or not so loose a chuffing sound and smoke from oil filler cap as puma washers are internal

20th Feb 2014 9:11am

Tumich

Member Since: 09 Apr 2013
Location: Prague
Posts: 9

2008 Defender 110 Puma 2.4 SW Blenheim Silver

ON the early MOdels 2007-08 were the Clutch plates or sth there bad made
so when its when the clutch is on
than it could be this

20th Feb 2014 3:15pm

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