 | Home > Puma (Tdci) > Timing Chain snapped |
 
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| Dinnu Member Since: 24 Dec 2019 Location: Lija Posts: 3414   
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^^^ never found any data, and there seem to be early and earlier failures.
Technically you could check the condition of the chain by checking phase shift between the crank sensor and the cam sensor. But also no values for that, but perhaps can compare with one that just had a new chain installed. 1988 90 Hard Top, 19J Diesel Turbo, Shire Blue - Restoration ongoing 2012 90 CSW, 2.2TDCI, Santorini Black |
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17th Jun 2022 5:31pm |
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| blackwolf Member Since: 03 Nov 2009 Location: South West England Posts: 17382  
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Before it breaks. Sorry, not helpful!  |
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17th Jun 2022 5:37pm |
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| custom90 Member Since: 21 Jan 2010 Location: South West, England. Posts: 20368
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Iโd tend to think 100k - 120k, seeing as the serpentine belt is approx 50k changes. $W33T $0U7H3RN $UG4R
๐ฌ๐ง๐ด๓ ง๓ ข๓ ฅ๓ ฎ๓ ง๓ ฟ๐ด๓ ง๓ ข๓ ท๓ ฌ๓ ณ๓ ฟ๐ด๓ ง๓ ข๓ ณ๓ ฃ๓ ด๓ ฟ๐ฎ๐ช๐บ๐ธโฝ๏ธ๐ข๏ธโ๏ธ๐งฐ๐ช |
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17th Jun 2022 5:40pm |
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| blackwolf Member Since: 03 Nov 2009 Location: South West England Posts: 17382
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I very much doubt that a change of engine number will devalue the vehicle, it will be decades before it becomes important that the numbers match on a Puma. You will however find that a new engine is painfully expensive. it is possible to buy brand new 2.4 engines in Defender spec to avoid a recon, there are those who say that the Puma engine does not take kindly to being reconditioned, although if it is done properly I don't see why there should be any problems. Alternatively there are engines available from accident-damaged vehicles now, although they will always be something of an unknown quantity. |
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17th Jun 2022 5:43pm |
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| blackwolf Member Since: 03 Nov 2009 Location: South West England Posts: 17382
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I ended up towing myself home! Fortunately I was only about half a mile from home, so I walked back, grabbed my S1 (my only other road-legal vehicle at the time) and a tow-rope, and went back to the Cortina. I then towed it a little bit at a time with the handbrake on moderately so it wouldn't roll by itself, stopping to jump out and steer the front wheels when necessary. Needless to say this was on very quiet roads and I wouldn't attempt it now. |
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17th Jun 2022 5:51pm |
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| blackwolf Member Since: 03 Nov 2009 Location: South West England Posts: 17382
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Hmm, I wonder what mine is like at 255k miles in that case.....  |
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17th Jun 2022 6:34pm |
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| custom90 Member Since: 21 Jan 2010 Location: South West, England. Posts: 20368
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Blackwolf - Well as you know itโs just one of those components that can let rip at any time. Like the clutchโs. You just never know when the Defender will ruin your day, then subsequent weeks and months later.
Gotta laugh, but then when considering the typical car is often as good as scrapped at anything over 80k miles then LRโs do well. Though typically the older LRโs seem to do far more miles trouble free than modern, and the newer they are the less miles they seem to do. Thatโs progress for you by LR. $W33T $0U7H3RN $UG4R ๐ฌ๐ง๐ด๓ ง๓ ข๓ ฅ๓ ฎ๓ ง๓ ฟ๐ด๓ ง๓ ข๓ ท๓ ฌ๓ ณ๓ ฟ๐ด๓ ง๓ ข๓ ณ๓ ฃ๓ ด๓ ฟ๐ฎ๐ช๐บ๐ธโฝ๏ธ๐ข๏ธโ๏ธ๐งฐ๐ช |
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17th Jun 2022 8:53pm |
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| Naks Member Since: 27 Jan 2009 Location: Stellenbosch, ZA Posts: 2638  
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I recall my indie telling me that the 2.4 engine was designed in such a way that should the timing chain snap, the engine shuts down without damaging anything.
but don't take my word for it, speak to indies who deal with the Puma  --
2010 Defender Puma 90 + BAS remap + Alive IC + Slickshift + Ashcroft ATB rear 2015 Range Rover Sport V8 Supercharged 
Defender Puma Workshop Manual: https://bit.ly/2zZ1en9 Discovery 4 Workshop Manual: https://bit.ly/2zXrtKO Range Rover/Sport L320/L322/L494 Workshop Manual: https://bit.ly/2zc58JQ |
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18th Jun 2022 7:39am |
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| Wethering Landy Member Since: 17 Jun 2022 Location: Suffolk Posts: 39 
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Hi Naks
Now that does sound interesting. Perhaps you can kindly tell me how I can fine Indie? When I look at Defender90 Keswick's video of the cylinder head fitting and head gasket fitting - there does seem to be quite a substantial thickness of head gasket. Perhaps this creates a gap that stops valves being hit? It did sound like it just jumped out of gear - and then it just faded away. There was no catastrophic noises. I have ordered a new chain and will go through some of the listed items in this thread this weekend - but it would be good if I could speak with Indie?? |
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28th Jun 2022 10:17am |
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| Naks Member Since: 27 Jan 2009 Location: Stellenbosch, ZA Posts: 2638
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He's actually close to you these days: he left ZA and is now the Service Manager at Engine 710 in Edinburgh
https://engine710.com/ +44 131 331 2810 Chap by the name of Phill McGee I'm not 100% that this info is correct, it may be have been for another engine. But I don't think we were talking about the AJV8, so it could only have been about the 2.4 Tdci. -- 2010 Defender Puma 90 + BAS remap + Alive IC + Slickshift + Ashcroft ATB rear 2015 Range Rover Sport V8 Supercharged
Defender Puma Workshop Manual: https://bit.ly/2zZ1en9 Discovery 4 Workshop Manual: https://bit.ly/2zXrtKO Range Rover/Sport L320/L322/L494 Workshop Manual: https://bit.ly/2zc58JQ |
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28th Jun 2022 10:23am |
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| Wethering Landy Member Since: 17 Jun 2022 Location: Suffolk Posts: 39
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You are a very kind chap. I will post the outcome here to let everyone know what he said.
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28th Jun 2022 10:25am |
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| Wethering Landy Member Since: 17 Jun 2022 Location: Suffolk Posts: 39
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Well here it is - The Tdci 2.4 Puma engine is a non interference engine because it is designed to withstand a chain breaking. It is to do with how the valves are shaped in the head.
Thanks Naks and also Phil McGee at Engine 710 for this golden news! If I could buy you both a beer I would! My next stage is to re-fit the chain. My friend is concerned on how we tell where to fit the chain on the bottom sprocket to ensure the pistons are in the correct position. There are timing marks on the inlet and exhaust but how do we get the bottom one right? Do we just follow a Youtube tutorial such as Defender90 Keswick's one? Has anyone got info on this please as getting it wrong would not be good. |
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28th Jun 2022 12:25pm |
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| Wethering Landy Member Since: 17 Jun 2022 Location: Suffolk Posts: 39
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PS - He did say that the most common cause of the chain snapping is the oil pump seizing. I need to check this.
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28th Jun 2022 12:31pm |
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| Wethering Landy Member Since: 17 Jun 2022 Location: Suffolk Posts: 39
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As I am waiting for the new chain to arrive, my mind is wondering if I should replace the oil pump whilst I have everything 'open'.
How hard is this to do when the engine is still in the vehicle? The sump needs to come off and then apparently lining up the chain/pump to ensure it runs true is tricky. Any advice? I am asking on this tread as I have been told it could have been the trigger for the chain snapping in the first place but I don't know how to test it. That of course might be the other option? |
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29th Jun 2022 8:27pm |
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