Member Since: 11 Nov 2019
Location: Derbyshire
Posts: 52
Engine knocking/Tapping - what would you do?
Hi All,
I have a disco 3, 2.7, S, 2006, ~167k on the clock.
Story:
Tues morning, dropped my wife off at work, went home (about 12mile round trip).
Tues eve, jumped in car to pick her up, started up, strange tapping/knocking. Running late, hoped it would go away. Sounds like a stereo typical diesel/tractor.
Arrived to pick her up, had a look under the bonnet hoping to see a wobbly fan or something, but aside from a small crack in a fin, all ok. Tapping still there, sounds very much like it's coming from the top of the engine...but could be anywhere!
Drove home, checked oil - nothing on the dip stick 🤦🏻♂️. Chucked in about 3L of 20w50 and 1L of 5w40 in blind panic. Started up, fingers crossed. Tapping still there. Ran around the block, no change.
Went to my local garage, they said it doesn't sound great, but suggested I went to my local landrover guys (Cavendish Motors in Chesterfield). Popped in to see them, who upon a brief visual inspection were suspecting the tensioner, but not sure. I then explained the oil situation, when they said "oh dear". And explained the cost to investigate/repair (3k upwards).
So, I don't have the cash for a repair, I don't have a garage or the tools or experience to look myself. So declared it a write off! ☹️
However, I failed to mention something odd that I cannot explain. After filling with about 4-5L (max) of oil, the dipstick was then showing well over Max! Why? Had it run dry in the first place? Or was it hiding somewhere? Can this happen, if so why? Seems odd to go from none to overfilled after putting in less than the capacity!
Anyway, my question is, what would you do? Even if I had the cash for a repair, it's probably not worth it. Car cost less when we bought it! Is there anything worth the time, money and effort to investigate before a sell it as scrap?
Any thoughts most welcomed!
Cheers,
24th Mar 2021 4:34 pm
DN D3 Decade
Member Since: 23 Jun 2006
Location: W.London.
Posts: 2289
Cue....DSL ‘the stripper’ .......... Sorry to hear of your engine woes btw Any sign of drastic oil leakage, or has all this oil been burnt ?D3 owned from new, P017 brake recall, BAS FBHIC, new FBH, LR013487 oil pump, new water pump. RRS front lower suspension arms. New suspension compressor/ relay. New Denso alternator. CuNifer rear brake pipes. New GKN rear propshaft. New HPFP belt & tensioner. New A/C Condenser.NO WARRANTY for many many years.
24th Mar 2021 5:01 pm
DSL Keeper of the wheelie bin
Member Since: 11 May 2006
Location: Off again! :-)
Posts: 72740
I wasn’t going to suggest stripping route just yet. Flogging might be a better option.
24th Mar 2021 5:05 pm
arthurdent
Member Since: 11 Nov 2019
Location: Derbyshire
Posts: 52
Thanks for the sentiments 😭
No sign of any major leaks!
24th Mar 2021 5:18 pm
DSL Keeper of the wheelie bin
Member Since: 11 May 2006
Location: Off again! :-)
Posts: 72740
Don’t s’pose you took a video clip of it running? That, downloaded to YouTube, would help peeps enormously.
24th Mar 2021 5:21 pm
arthurdent
Member Since: 11 Nov 2019
Location: Derbyshire
Posts: 52
Didn't take a video, but can do. I did find one on here yesterday on a similar thread that sounded very similar.
Will take one shortly and drop a link in here.
24th Mar 2021 5:46 pm
DSL Keeper of the wheelie bin
Member Since: 11 May 2006
Location: Off again! :-)
Posts: 72740
And put up a link to the vid that sounds similar. Just hope it wasn’t one of mine from summer 2017.
24th Mar 2021 5:50 pm
arthurdent
Member Since: 11 Nov 2019
Location: Derbyshire
Posts: 52
Link to mine running:
Trying to find the thread I mentioned!
24th Mar 2021 5:57 pm
arthurdent
Member Since: 11 Nov 2019
Location: Derbyshire
Posts: 52
I was unable to put any revs on, but may drag some one out to assist me and take another!
24th Mar 2021 6:02 pm
arthurdent
Member Since: 11 Nov 2019
Location: Derbyshire
Posts: 52
2nd vid with a few revs on.
Whatcha reckon?
24th Mar 2021 6:11 pm
Gareth Site Moderator
Member Since: 07 Dec 2004
Location: Bramhall
Posts: 26682
Have you checked for an exhaust blow? It’s to quick a frequency to be an injection seal. I think it sounds to be at crank shaft speed.
24th Mar 2021 6:31 pm
arthurdent
Member Since: 11 Nov 2019
Location: Derbyshire
Posts: 52
Not really. Had a quick listen around, but don't really know what's what under there tbh, and don't want to make anything worse - if it can get any worse!!!
24th Mar 2021 7:00 pm
Motolab
Member Since: 18 Oct 2019
Location: Sleen
Posts: 1815
I would suggest to rule out a potential worst case scenario.... remove the oil filter, drain it for an hour or more and cut it open, if there are metal parts in it, you can ditch the engine....
If not, it is worth investigating further / other scenarios..
Reading your low oil readings, mileage etc... and the fact that mine did sounded the same when a bearing was spun.... i am worried for you... 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.
24th Mar 2021 7:04 pm
arthurdent
Member Since: 11 Nov 2019
Location: Derbyshire
Posts: 52
@Motolab, thanks, sounds like the best plan! Will look to do this tomorrow or Friday all being well. Will report back. If there's nothing there, then will look further as you suggest. However, from everything I've come across I am not holding out too much hope!
Any tips when it comes to looking at the oil filter? I've never experienced this before, so not sure how obvious it may (or may not) be!
Cheers,
24th Mar 2021 7:09 pm
DN D3 Decade
Member Since: 23 Jun 2006
Location: W.London.
Posts: 2289
Has it been confirmed that the auxiliary belt tensioner pulley or idler pulley bearings are definitely ok ? Just to rule out a possible easy fix. D3 owned from new, P017 brake recall, BAS FBHIC, new FBH, LR013487 oil pump, new water pump. RRS front lower suspension arms. New suspension compressor/ relay. New Denso alternator. CuNifer rear brake pipes. New GKN rear propshaft. New HPFP belt & tensioner. New A/C Condenser.NO WARRANTY for many many years.
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