Member Since: 29 Oct 2018
Location: Ashford
Posts: 55
D3 Petrol AJV8 Timing Chain replacement Advice needed
Hello All,
My Disco 3 V8 is coming up to 150k and getting close to the chains and tensioner to be replaced..
Can anyone give me a little advice please..
1) What sort of job is it to do? Was thinking of doing it through the front?
2) Chain kits, Looks like LR do everything separate, but what about the kits I have seen for sale (Eurosport, BGA) are they any good?
3) Any pointers from anyone?? Please
Best wishes,
JewlsD3 V8 HSE
Pug 205 Van
E36 3.2 M3 Evo Compact
28th Oct 2019 3:59 pm
kajtzu
Member Since: 10 Aug 2017
Location: Helsinki
Posts: 6778
I don’t think the service manual has an interval for the timing chains to be replaced...?
At 150k miles (240k km) the ancillary belts should be replaced although I had mine done at around 190 k km.
28th Oct 2019 5:15 pm
Globetrotter448
Member Since: 21 Mar 2017
Location: Londonderry NSW
Posts: 1822
If they are not noisy or rattling and you change the oil regularly then they may not need changing
29th Oct 2019 4:05 am
kajtzu
Member Since: 10 Aug 2017
Location: Helsinki
Posts: 6778
Yeah, that’s the advice I got, too.
29th Oct 2019 5:17 am
Jewls
Member Since: 29 Oct 2018
Location: Ashford
Posts: 55
The other reason for replacing is that I keep getting advanced timing on both banks, done all the usual stuff and replaced the TDC sensor and a couple of other bit.
So the next option is to check the timing and make sure its all where it should be.. And if I'm going to do that, I may as well, replace it all..
I got the chain @ 150K from a member on here, so isn't that the case then?
all seems very odd, as it has no rattles, engine pulls well etc, it just keeps putting the engine man light on, normally when I turn of, its on after, so if I rest the fault and running, it tends to stay off until its turned off?? All so very odd..
Best wishes,
JewlsD3 V8 HSE
Pug 205 Van
E36 3.2 M3 Evo Compact
29th Oct 2019 9:26 am
kajtzu
Member Since: 10 Aug 2017
Location: Helsinki
Posts: 6778
Well, I’m first to admit that you’re much deeper in the engine than what I’ve ever been
I asked an Indy here a few years ago about this and their answer was that normally the timing chains on a D3 V8 don’t need anything. Unless one starts hearing clicking/rattling - and - even that usually can be heard “a long time” before there is any danger of them breaking.
I just know how to read codes and know when to (not) spend my hard earned cash
29th Oct 2019 6:05 pm
Globetrotter448
Member Since: 21 Mar 2017
Location: Londonderry NSW
Posts: 1822
Timing is usually a function of the ECU and fuel (crankshaft position sensor). You may have O2 sensor problems. There was an article relating to the O2 sensors on a V8
29th Oct 2019 9:36 pm
MintyHit
Member Since: 25 Jul 2017
Location: Bradford on Avon
Posts: 234
Jewls wrote:
I keep getting advanced timing on both banks
Is this a specific DTC code? If so what is it and what are you using to read the code?
Don't forget these engines have variable timing on the inlet - that could be at fault.
30th Oct 2019 10:59 am
Jewls
Member Since: 29 Oct 2018
Location: Ashford
Posts: 55
The codes are:
P0011-00(AA) Intake camshaft position timing - over advanced (bank 1)
P0021-00(AA) Intake camshaft position timing - over advanced (bank 2)
I have a GAP IID BT and a snap-on verus edge, both say the same thing..
Was in the thought that both VVT would be odd to both go faulty (but possible) so was thinking more down the road of chains or guides??
Was thinking of popping the cam covers and using the timing tool to check if its moved, and also see if there is a little movement between top and bottom, if that's all good, i guess focus will be on the VVT's, if there anything that can be done with them, or no option, just replace??
Regards,D3 V8 HSE
Pug 205 Van
E36 3.2 M3 Evo Compact
5th Nov 2019 6:29 pm
SafariDave
Member Since: 19 Nov 2011
Location: NYC & LA
Posts: 775
Here in the US the D3 V8's 4.4 are running up to 300K miles without needing the timing chains replaced or adjusted. Maybe yours is a special case. Timing chain issues are on the D3 V6 4.0 and on the D4 V8 5.0. Not on the 4.4 V8.
DaveD3 2005 V8 SE Bonatti Grey "The Rhino" (our NYC D3)
De-tangoed Headlights, D4 2016 Style Black Pack Grille, D4 19" Wheels/ Bridgestone Alenza
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5th Nov 2019 7:08 pm
MintyHit
Member Since: 25 Jul 2017
Location: Bradford on Avon
Posts: 234
The components that could generate those error codes are as follows:
VVT
Crankshaft position sensor
Camshaft position sensors
Before checking the chain it might be worth taking a look at the crankshaft sensor?
6th Nov 2019 11:55 am
Discoveringcomfort
Member Since: 16 Sep 2015
Location: Berkshire
Posts: 637
Just to add to this, a stretched timing chain would result in late cam timing.
A slack chain would be noisy.Series 1 V8
Series 2 Hibrid V8
Discovery 3 HSE V8
7th Nov 2019 6:41 am
Alphamale
Member Since: 28 May 2014
Location: Belfast
Posts: 497
While this article is for the renewal of the timing chains, tensioners and guides on a Jag XJ8, it's the same engine as in our 4.4 D3 V8s. Once you get past the basic teardown, in the storey, the actual dismantling and engine rebuild are identical. I found the article to be a great guide to doing the job and good to refer to.
I would say however that you will need special tools for the VVT timing chain. Also when I did my head rebuild a few years ago (100,000ml) I found the chains to be good but I replaced the tensioners.
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