 | Home > Puma (Tdci) > One of the pistons failed need advice |
 
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| htb2 Member Since: 02 Nov 2018 Location: Carmarthenshire Posts: 524  
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Why did piston fail? Leaking injector? From what I hear the engines do not rebuild well.
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28th Dec 2021 4:21pm |
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| geobloke Member Since: 06 Nov 2012 Location: Nottinghamshire Posts: 4410 
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Has the mechanic found metal scarf in the oil pump or is he just assuming it needs replacing? Mind you if there is piston metal in the oil where else has it gotten to, worn or blocked up?!
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28th Dec 2021 4:44pm |
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| Co1 Member Since: 19 Aug 2018 Location: North Yorkshire Posts: 3662 
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You will need to remove the pump anyway, and if a piston has failed there is a good chance that swarf will have been sucked up into the pump. You might as well buy it and get yours inspected when he takes it out and then either fit the new one or return it based on what he finds.
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28th Dec 2021 6:29pm |
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| Arsath Member Since: 20 May 2015 Location: Sri Lanka Posts: 133  
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He is just assuming that there is a good chance that it can fail. He is saying that if that happens engine can sieze again and will have to go through this again. |
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29th Dec 2021 1:07am |
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| Dinnu Member Since: 24 Dec 2019 Location: Lija Posts: 3392  
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Maybe there is a mixup with the oil pump recall that was on the 2.2?
But as others mentioned, debris from the broken piston could get in the oil pump. The filter should prevent them going further. 1988 90 Hard Top, 19J Diesel Turbo, Shire Blue - Restoration ongoing 2012 90 CSW, 2.2TDCI, Santorini Black |
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29th Dec 2021 6:38am |
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| JPE Member Since: 19 Nov 2018 Location: South West England Posts: 331 
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We’re second guessing the mechanic’s reasoning. I’d suggest ask the mechanic why he’s recommending changing the oil pump. It will probably be for the reasons above.
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29th Dec 2021 9:09am |
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| MK Member Since: 28 Aug 2008 Location: Santiago Posts: 2400  
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I hope he knows the cylinder needs honing before assembling new piston rings etc. Perhaps new conrod and crankshaft bolts. I would also look at the cooling jets. Puma 110" SW
............................................................. Earth first. Other planets later |
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29th Dec 2021 10:51am |
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| blackwolf Member Since: 03 Nov 2009 Location: South West England Posts: 17305 
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I'm not entirely sure what "one of my pistons has failed" means but I have to say that I cannot conceive of any situation which required a new piston where I would be happy with anything short of a full strip and rebuild of the engine.
Virtually any sort of piston failure will have resulted in debris loose in the engine, and it will potentially have got everywhere. That means every component of the lubrication system is now compromised (which includes the block, crank, PCJs, turbo, all pipes and galleries, in short anything which has or provides an oil supply). As noted above the bore will need honing, and that will also produce highly abrasive debris. If it was my vehicle, unless I planned to sell it within minutes of being repaired and wanted a guilty conscience after the sale, I would be looking either for a replacement used engine or a fully-rebuilt complete (not short) engine. I do however recognise that the OP's location may limit options, and also that that continent is much better that Europe for improvising repairs to an extremely high standard. |
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29th Dec 2021 1:32pm |
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