TobyMellin Posted December 21, 2018 Share Posted December 21, 2018 My 2000 90 TD5 has been smoking quite a bit for a while now and a compression test confirmed cylinder 2 was low. I've been pondering for a while now whether to pull it and rebuild it. As of yesterday afternoon, the cylinder head has failed...again. Header tank was empty and engine locked when I went top start it up this morning. After turning it over by hand I've now concluded the head has cracked again after filling the yard with white smoke. I've decided I'm going to throw another 'known good' engine in out of a friend who is breaking a few Discoverys. My question is...should I carry on with the 10p engine, or put a 15p in? I can't see any reason why a 15p wouldn't run off the 10p ECU once the injectors are coded? Or would I need the 15p ECU aswel? Are here any benefits to putting the 15p in? Has anyone on here done the swap? I'm a truck mechanic so the swap is not a problem, it's just the differences between the 2 engines I am unsure of. Thanks in advance Toby Quote Link to comment Share on other sites More sharing options...
SPendrey Posted December 21, 2018 Share Posted December 21, 2018 "My question is...should I carry on with the 10p engine, or put a 15p in?" If you only put a 10p engine in, it's not going to last. 15p seems much more like the price you should pay for a high value/quality item. 😀 Quote Link to comment Share on other sites More sharing options...
TobyMellin Posted December 21, 2018 Author Share Posted December 21, 2018 If it's a fairly straight forward swap (i'm limited on time), then I will throw a 15p in. I just haven't got the time to be going getting pipes made, making brackets etc. To be honest....I have a feeling my remap has something to do with the constant head cracking (this is the 3rd cylinder head to crack in 3 years....) It does overfuel quite a lot (black smokes heavily under load) and I am loaded quite a lot of the time due to my fitted toolbox/racking etc and towing trailers. The map will be getting changed as soon as the head/engine is swapped. Thanks Toby Quote Link to comment Share on other sites More sharing options...
steve200TDi Posted December 21, 2018 Share Posted December 21, 2018 The fuel pressure is different between the two so you would need the correct ECU along with the injector codes. And also the fuel pressure regulator is different too. Have you pressure tested the cylinder head so you know it's definitely cracked and not just the cylinder head moving because of the plastic dowels and/or the head gasket itself failing? The compression test - was it down down the glow plug holes (probably not as there's only 4!) or injector holes? Could be a copper washer at fault? Steve Quote Link to comment Share on other sites More sharing options...
TobyMellin Posted December 21, 2018 Author Share Posted December 21, 2018 (edited) 45 minutes ago, steve200TDi said: The fuel pressure is different between the two so you would need the correct ECU along with the injector codes. And also the fuel pressure regulator is different too. Have you pressure tested the cylinder head so you know it's definitely cracked and not just the cylinder head moving because of the plastic dowels and/or the head gasket itself failing? The compression test - was it down down the glow plug holes (probably not as there's only 4!) or injector holes? Could be a copper washer at fault? Steve Hi Steve, I have the proper Sykes Pickavant pressure tester that goes in the injector hole. The head is still on at the moment. Unfortunately this isn't the first time it has happened (this is head No3 in 2 years!). It also has steel dowels fitted from when I previously did the head. I also changed the injector seals/washers about 2 months ago due to a starting issue, which the seals/washers cured. I'm leaning towards just replacing with another 10p. I've been looking to swap to a 110 for a while anyway, so maybe this is the time. I have attached a picture of the previous head crack, from coolant gallery in to cylinder 3. Thanks Toby Edited December 21, 2018 by TobyMellin Quote Link to comment Share on other sites More sharing options...
steve200TDi Posted December 21, 2018 Share Posted December 21, 2018 Ok, yes you could replace it. So yes you've done a compression test, but I was also referring to a pressure tested the cylinder head i.e. strip cylinder head block up all holes and fill with water on the fuel and coolant side and see if it holds pressure. Then you can see if it has cracked! Steve Quote Link to comment Share on other sites More sharing options...
TobyMellin Posted December 21, 2018 Author Share Posted December 21, 2018 5 minutes ago, steve200TDi said: Ok, yes you could replace it. So yes you've done a compression test, but I was also referring to a pressure tested the cylinder head i.e. strip cylinder head block up all holes and fill with water on the fuel and coolant side and see if it holds pressure. Then you can see if it has cracked! Steve I normally get them pressure tested by my local engine shop, they charge me £60 to test old head, if it has failed, they test and clean the new head for free. I think I'll whip the head off and get it down to them, typical it happens when everywhere is shut for parts etc but I'm in work over Christmas and need a car ☹️ Looks like the Mrs is getting up at 5 and taking me to work 😄 I can't put the head failures down to anything other than the over fueling of the remap....or maybe I just have really bad luck 😅 Quote Link to comment Share on other sites More sharing options...
RedLineMike Posted December 21, 2018 Share Posted December 21, 2018 1 hour ago, steve200TDi said: The fuel pressure is different between the two so you would need the correct ECU along with the injector codes. And also the fuel pressure regulator is different too. Have you pressure tested the cylinder head so you know it's definitely cracked and not just the cylinder head moving because of the plastic dowels and/or the head gasket itself failing? The compression test - was it down down the glow plug holes (probably not as there's only 4!) or injector holes? Could be a copper washer at fault? Steve supply fuel pressure is the same on both engines, but IIRC the injection pressure is different on the 15p to be higher for a cleaner burn also the 15p has slightly different engine loom & has a 4 wire IAT/MAP sensor rather than the 3 wire map sensor on the 10p, ive personally ran a 10p engine in a 15p setup, but not the other way round Quote Link to comment Share on other sites More sharing options...
TobyMellin Posted December 21, 2018 Author Share Posted December 21, 2018 Just now, RedLineMike said: supply fuel pressure is the same on both engines, but IIRC the injection pressure is different on the 15p to be higher for a cleaner burn also the 15p has slightly different engine loom & has a 4 wire IAT/MAP sensor rather than the 3 wire map sensor on the 10p, ive personally ran a 10p engine in a 15p setup, but not the other way round I was aware of different injection pressures, but was unsure if this was monitored by the ECU or not. I did read on landyzone of a guy who says he has fitted a 15p in to his 10p, coded the injectors and off he went, but that's only one person, I can't find anyone else. Thanks for the input Quote Link to comment Share on other sites More sharing options...
JohnnoK Posted December 23, 2018 Share Posted December 23, 2018 Have a look at the AMC replacement heads, they are a lot better made than the stock ones and address all the weaknesses of stock. Quote Link to comment Share on other sites More sharing options...
TobyMellin Posted December 23, 2018 Author Share Posted December 23, 2018 Confirmed the head has cracked again. Managed to source another second hand head and get it tested and cleaned on Friday, fitted Saturday. Toby Quote Link to comment Share on other sites More sharing options...
JohnnoK Posted December 23, 2018 Share Posted December 23, 2018 Now, get yourself a coffee tin and start putting the spare change in it for the AMC head... Quote Link to comment Share on other sites More sharing options...
TobyMellin Posted December 26, 2018 Author Share Posted December 26, 2018 On 12/23/2018 at 11:53 PM, JohnnoK said: Now, get yourself a coffee tin and start putting the spare change in it for the AMC head... 🤑 Quote Link to comment Share on other sites More sharing options...
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