Member Since: 07 Apr 2020
Location: Christchurch
Posts: 12
Discovery 3 Timing Belt Tensioner/ Oil pump failure
Hi everyone. Iam new to the forum and in need of some advice.
My disco 3 failed two weeks ago and I finally managed to take a look today and find out what happened.
The engine was at low Revs and just stopped without any real noise. Although turning it over afterwards it didn’t sound good.
Having removed the timing belt cover it has all become clear. The oil pump housing has failed at the tensioner attaching point. Gutted!
The most common advice has been to sell the car as it is and give up. But I am not keen on giving up so easily. I like a challenge. And due to the lockdown I have found I have a lot of spare time!!
I am considering changing or re building the cylinder heads (second hand off eBay) and obviously replacing the oil pump housing.
I have read a few threads on cylinder head removal and as difficult as I am sure it will be it can be done with body on. I don’t have access to a lift and my budget is very small. So I will just have to struggle.
Any advice from all of you guys would be appreciated!!!
One issue I can see is finding the timing position for the crank shaft now??
I am sure there are many other pitfalls ahead of me but could be interesting.
All of your thoughts please??
13th Apr 2020 7:07 pm
kajtzu
Member Since: 11 Aug 2017
Location: Helsinki
Posts: 6632
I think it would be safer to transplant an engine from a Jaguar S-Type and install it instead.
13th Apr 2020 7:15 pm
MikeBob
Member Since: 19 Sep 2016
Location: Pretoria
Posts: 114
Replace the oil pump first, redo the timing and see what happens. Maybe you get lucky
13th Apr 2020 7:34 pm
Gimpyfin
Member Since: 07 Apr 2020
Location: Christchurch
Posts: 12
My first thought was to change the engine, but finding a good engine is a risk and I would need to take the body off which I can’t do.
Maybe I am nuts but the bottom end of my engine should still be ok.
Going to take the injectors out next and stick a borescope in to see what damage has been done. Hoping as it was at such low revs I am looking at just bent valves.
13th Apr 2020 7:37 pm
Gimpyfin
Member Since: 07 Apr 2020
Location: Christchurch
Posts: 12
MikeBob wrote:
Replace the oil pump first, redo the timing and see what happens. Maybe you get lucky
Any ideas on re timing the crank and camshafts if I gave it a whirl? They will be all over the place.
13th Apr 2020 7:49 pm
Motolab
Member Since: 18 Oct 2019
Location: Sleen
Posts: 1820
Buy a timing kit... laser tools or alternative... not very expensive..
You need to Remove the starter, to locate the flywheel pin, cams are the easy bit..Best regards
Harold
Always looking for Pre '55's & Pre war British Motorcycles! knowing or having one for sale? PM please. I visit the UK 6 times a year
Ps. I edit my texts quite often, english is not my native language, so I will edit My “typo’s” etc.
13th Apr 2020 8:14 pm
Gimpyfin
Member Since: 07 Apr 2020
Location: Christchurch
Posts: 12
Thank u for the info. As I understand it the crank shaft pulley has no master spline and the crank is timed through a hole on the flywheel as you say. The initial position for this is determined by putting pins in the cam shafts?? Going to be fun finding or even getting it to the timing position now unless I am mistaken?? 🤦♂️
13th Apr 2020 8:25 pm
MikeBob
Member Since: 19 Sep 2016
Location: Pretoria
Posts: 114
You need someone on the crank bolt to turn the engine slowly till you locate the hole. You will see it thru the starter hole. Obviously you need to lock the flywheel to undo the crank bolt to get the old oil pump off
13th Apr 2020 8:33 pm
Motolab
Member Since: 18 Oct 2019
Location: Sleen
Posts: 1820
No... I think you are making it too difficult....
Turn the crankshaft with the bolt on the pulley until the hole above the starter matches the hole in the flywheel..... fit the tool....
Then turn the camshafts until the holes match for the camshaft locating pins...
See pics
Hole..lined up
Tool inserted
Cam location, pins insertedBest regards
Harold
Always looking for Pre '55's & Pre war British Motorcycles! knowing or having one for sale? PM please. I visit the UK 6 times a year
Ps. I edit my texts quite often, english is not my native language, so I will edit My “typo’s” etc.
13th Apr 2020 8:41 pm
Gimpyfin
Member Since: 07 Apr 2020
Location: Christchurch
Posts: 12
Seriously thank you for the pics and description. Knew I could rely on the Land Rover community!
However my worry is turning the crank/engine over till it lines up with the timing hole. As the camshafts are not going to turn will the pistons not hit the valves at some point? Guess it’s a high compression engine?
13th Apr 2020 8:48 pm
gstuart
Member Since: 21 Oct 2016
Location: kent
Posts: 13854
Hi
Would this these videos make life easier how to time it up, of course the more knowledgeable members will be able to verify seeing the video is showing a D4 and u have a D3
What do u think plse as I know ur considerably more experienced than myself and just wondered seeing it in a video if it would be useful to the op
Many thks
Ps, this video is a series of x 4
13th Apr 2020 9:01 pm
Motolab
Member Since: 18 Oct 2019
Location: Sleen
Posts: 1820
Big chance the camshafts are more or less in the neutral position now...
Since the Big Bang...
Have a look at the timing holes.... off the camwheels first.... before worrying Best regards
Harold
Always looking for Pre '55's & Pre war British Motorcycles! knowing or having one for sale? PM please. I visit the UK 6 times a year
Ps. I edit my texts quite often, english is not my native language, so I will edit My “typo’s” etc.
13th Apr 2020 9:07 pm
gstuart
Member Since: 21 Oct 2016
Location: kent
Posts: 13854
Extract from the workshop manuals , after opening them just press download
Member Since: 07 Apr 2020
Location: Christchurch
Posts: 12
Motolab wrote:
Big chance the camshafts are more or less in the neutral position now...
Since the Big Bang...
Have a look at the timing holes.... off the camwheels first.... before worrying
Ok great. Thank u! I Will investigate further tomorrow and look at starter removal.
Will keep everything crossed that it hasn’t beaten too many valves. Will be amazed if i have got away without any damage to the top end..... keeping everything crossed!!
13th Apr 2020 9:17 pm
Gimpyfin
Member Since: 07 Apr 2020
Location: Christchurch
Posts: 12
gstuart wrote:
Extract from the workshop manuals , after opening them just press download
You cannot post new topics in this forum You cannot reply to topics in this forum You cannot edit your posts in this forum You cannot delete your posts in this forum You cannot vote in polls in this forum
