Bowie69 Posted January 20, 2020 Share Posted January 20, 2020 Get yourself some decent pistons and slap it back together. 1 Quote Link to comment Share on other sites More sharing options...
monkie Posted January 20, 2020 Author Share Posted January 20, 2020 13 minutes ago, Bowie69 said: Get yourself some decent pistons and slap it back together. That's the plan! I'm going to get my injectors checked out as well. It looks like the engine was trying to lower its compression ratio on its own! Quote Link to comment Share on other sites More sharing options...
monkie Posted January 20, 2020 Author Share Posted January 20, 2020 1 hour ago, reb78 said: There are some 19J engines for sale here Phil in case of interest https://www.lrukforums.com/threads/19j-diesel-turbo.257737/ nothing to do with me but spotted them yeaterday. Thanks Richard. I'm going to do as Bowie says and then start saving up! Quote Link to comment Share on other sites More sharing options...
Peaklander Posted January 20, 2020 Share Posted January 20, 2020 When I was in the engineering place in Sheffield to drop off my head the other day, I saw a block on a stand. I could see three pistons but where the fourth should have been was a pile of pebbles. I had a moment where I honestly thought it was being used as some sort of ashtray or something. Apparently it was a Merc engine and the piston had been subjected to a flamethrower of an injector which they believed was squirting directly down onto the head. Quote Link to comment Share on other sites More sharing options...
Stellaghost Posted January 20, 2020 Share Posted January 20, 2020 Shame you aren't closer to the Scottish borders I have a turbo diesel sat in the garage you can have for free was from a site vehicle from work if it can be relayed it's yours was running when stripped out of vehicle regards Stephen Quote Link to comment Share on other sites More sharing options...
blowmeover Posted January 20, 2020 Share Posted January 20, 2020 Make sure you have the correct cooling jets fitted and they are working properly. I would get the pump checked as well as the injectors, injectors weren't blue box too were they? Quote Link to comment Share on other sites More sharing options...
Peaklander Posted January 20, 2020 Share Posted January 20, 2020 17 hours ago, smallfry said: I would check the boost diaphragm in the pump. If its pinholed, fuel can feed into the boost pressure tube which runs from the turbo housing to boost diaphragm cover. This will add extra fuel, which will cause knocking, and also add heat. When this gets bad, it will go runaway, with LOTS of white smoke. How is the diaphragm checked @smallfry? I ask as white smoke was a problem for me and I could check this as well. Quote Link to comment Share on other sites More sharing options...
monkie Posted January 20, 2020 Author Share Posted January 20, 2020 4 hours ago, Stellaghost said: Shame you aren't closer to the Scottish borders I have a turbo diesel sat in the garage you can have for free was from a site vehicle from work if it can be relayed it's yours was running when stripped out of vehicle regards Stephen They weren't blue box but I am now highly suspicious of them. I will get them checked. I think the first port of call will be diesel Bob as a few people on here have recommended him. Quote Link to comment Share on other sites More sharing options...
blowmeover Posted January 20, 2020 Share Posted January 20, 2020 3 hours ago, Peaklander said: How is the diaphragm checked @smallfry? I ask as white smoke was a problem for me and I could check this as well. The pipe to the turbo , blow into it, it should not allow you to, also suck it, again it should not allow you to. 1 Quote Link to comment Share on other sites More sharing options...
monkie Posted January 20, 2020 Author Share Posted January 20, 2020 4 hours ago, Stellaghost said: Shame you aren't closer to the Scottish borders I have a turbo diesel sat in the garage you can have for free was from a site vehicle from work if it can be relayed it's yours was running when stripped out of vehicle regards Stephen Thank you, that is very kind of you. I might look into how much a courier would be. Quote Link to comment Share on other sites More sharing options...
blowmeover Posted January 20, 2020 Share Posted January 20, 2020 1 minute ago, monkie said: They weren't blue box but I am now highly suspicious of them. I will get them checked. I think the first port of call will be diesel Bob as a few people on here have recommended him. Where did you get them from? Have you had a look at them? What are the nozzles like? Any blueing or deformed in any way? You could unscrew the nozzles and see if the pins are sliding up and down correctly. Quote Link to comment Share on other sites More sharing options...
monkie Posted January 20, 2020 Author Share Posted January 20, 2020 16 minutes ago, blowmeover said: Where did you get them from? Have you had a look at them? What are the nozzles like? Any blueing or deformed in any way? You could unscrew the nozzles and see if the pins are sliding up and down correctly. They are the original ones but I got them refurbed by a diesel specialist near Reading I think whilst I was working that way. I'm away in Germany at the moment so can't pop out and look at them but I didn't notice anything obvious visually. I'm not going to fiddle with them, I'll speak with diesel bob first and possibly send them and the pump to him Quote Link to comment Share on other sites More sharing options...
blowmeover Posted January 20, 2020 Share Posted January 20, 2020 When you get back have a read of the codes on the nozzles, I have a couple of sets here and we can compare, I dont know if there are different nozzles for these injectors but I would assume that there is. Quote Link to comment Share on other sites More sharing options...
monkie Posted January 20, 2020 Author Share Posted January 20, 2020 I'm not aware of different types of nozzle for the 19J. I've got a late type (1990). The more I think about this the more I blame the pistons being made of substandard stuff that can't take the heat. The hot spots aren't damaged, the injector nozzles themselves didn't look damaged on the surface and I don't think it's the oil jets on the underside. I'm going to replace the pistons, put my recon turbo on (Richard's old turbo with new chra), get the injectors tested and then put it all back together. If I can be bothered I might take the head off in 12 months to see how the pistons are coping. Quote Link to comment Share on other sites More sharing options...
blowmeover Posted January 20, 2020 Share Posted January 20, 2020 I didn't mean for the 19J, I am wondering what else these injectors go into., it could be that the spray pattern was putting fuel straight down onto the piston rather than vaporise it. That would probably cause that kind of damage. Or that the injector was open for too long a period, but that would be more to do with the pump. If it was running lean it could have got hot, did it get up to running temp normally? In other words, take ages? When my pump timing was retarded it got up to operating temperature really quickly. Quote Link to comment Share on other sites More sharing options...
monkie Posted January 20, 2020 Author Share Posted January 20, 2020 No, it got nice and warm within a mile or two. The injectors spray fuel directly into the swirl chamber so shouldn't be penetrating through to the piston... I hope. Quote Link to comment Share on other sites More sharing options...
blowmeover Posted January 21, 2020 Share Posted January 21, 2020 If they are operating correctly, Im not sure it is a swirl chamber, I think its pre combustion ,either way , its been burning the fuel in the chamber too hot, possibly due to timing being retarded? if it is a pre combustion chamber it shouldn't be burning all the fuel in the chamber , as the melting occurred directly under the chambers throat my guess is something is going wrong in the chambers. Quote Link to comment Share on other sites More sharing options...
monkie Posted January 28, 2020 Author Share Posted January 28, 2020 I've got my new pistons, had some advice from diesel Bob who said if it isn't smoking and it starts okay it is unlikely to be injectors and pump. So the plan is to put it all back together with my recon turbo and start saving for a defender 200tdi and then do a rebuild of that like Western did. I think a defender spec 200tdi will have a stock look rather than a disco tdi slapped in. Thank you for all of the advice and help. 2 Quote Link to comment Share on other sites More sharing options...
blowmeover Posted January 28, 2020 Share Posted January 28, 2020 Just a thought, but none of my 19Js got hot quickly, they all ran fairly cold, except this present one, got hot very quickly because the timing was retarded. Quote Link to comment Share on other sites More sharing options...
monkie Posted January 28, 2020 Author Share Posted January 28, 2020 1 hour ago, blowmeover said: Just a thought, but none of my 19Js got hot quickly, they all ran fairly cold, except this present one, got hot very quickly because the timing was retarded. It gets warm in a couple of miles. I now know the pistons get warm in a couple of metres Quote Link to comment Share on other sites More sharing options...
Snagger Posted January 29, 2020 Share Posted January 29, 2020 It could be piston quality, but I’d be very suspicious of the injector pattern, recon or not - in fact, their recon nature would make me MORE suspicious - most recon in LR circles means cleaned up scrap, not much re but plenty of con. Quote Link to comment Share on other sites More sharing options...
monkie Posted January 29, 2020 Author Share Posted January 29, 2020 I think that it is piston quality as the injectors were in a right old state on the engine before I rebuilt it. I sent them away and the nozzles were replaced on all 4. The old nozzles had heat marks and a lot of baked on soot all over them. Quote Link to comment Share on other sites More sharing options...
Snagger Posted January 29, 2020 Share Posted January 29, 2020 I’d still have the injectors checked (pump too) - they may have e the correct spray pattern at certain pressures, but perhaps not at the pressure your pump is providing. The apex of the V is almost directly under the injector, so it seems a bit too much of a coincidence. Quote Link to comment Share on other sites More sharing options...
Mo Murphy Posted January 29, 2020 Share Posted January 29, 2020 I think the 200 tdi plan is probably the best plan monkie. Mo Quote Link to comment Share on other sites More sharing options...
monkie Posted February 15, 2020 Author Share Posted February 15, 2020 It lives! It must have been rough before as the thing that I noticed most was how sweet it was ticking over. 1 Quote Link to comment Share on other sites More sharing options...
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