Eightpot Posted January 28, 2016 Share Posted January 28, 2016 Before I throw in the towel and bin this engine, just want to rule something out- Got a TD5 that had blown HG. Head off, pressure tested/skimmed, new quality gasket kit etc. While head was off noticed no 1 piston was not protruding enough, so sump off and found the bearing had worn badly and also scored the crank (but only on no 1)- I think this was the cylinder where gasket failed and water had prob got in. Anyhoo, replaced crank & bearings. May as well chuck in a clutch while I'm at it.. Engine built back up, but now its chuffing air back through the intake, resulting in a popping noise and excess pressure coming out of filler cap etc. Suspected the rings may have worn on no1 due to the piston being flung around, but a compression test shows this to be the best cylinder! Number 3 is way down, just wondering if a bad injector seal would have this effect? (Struggles to start from cold and smokey, clearing after a minute) Quote Link to comment Share on other sites More sharing options...
Eightpot Posted January 28, 2016 Author Share Posted January 28, 2016 Just whipped out injectors, all looks fine with seals and washers. Swapped the bad injector complete with its washer for the best performing one and compression now 100%. Dunno whats going on there then, hopefully it just hadn't clamped down properly. Quote Link to comment Share on other sites More sharing options...
Shackleton Posted January 28, 2016 Share Posted January 28, 2016 What happens when you put No.3 injector into No.1 cylinder? You'll replace the inj. seals and washers regardless right? Quote Link to comment Share on other sites More sharing options...
Eightpot Posted January 28, 2016 Author Share Posted January 28, 2016 New washers & seals were put in when head was done. So no 1 tested 400psi, no 3 260psi. I swapped injectors 1 & 3 over (with thier respective washers) and this time got 400psi on 1, 380 on cylinder 3 this time. three things I noticed - washers both looked great, no dints or signs of blow by. Washers are copper coated steel, was expecting pure copper, and the washer on no 3 was a very loose fit on the injector, not a friction fit like the others. really hoping the excess crank case pressure is due in some part to a badly seated washer as this engine's testing my patience to its ljmit! Quote Link to comment Share on other sites More sharing options...
BennehBoy Posted January 30, 2016 Share Posted January 30, 2016 Should really replace the washers every time, and only use genuine ones. Does injector 3 have a different end letter to the rest, what are the codes? Quote Link to comment Share on other sites More sharing options...
Eightpot Posted January 30, 2016 Author Share Posted January 30, 2016 Yes different letter- from 1 to 5: LNGDC LHLFA NDLFA NBNHC NBNNC All redone now with genuine washers- compression still down at 260psi on 3. I'm thinking a leaky injector might have helped the rings wear down on that cylinder. Quote Link to comment Share on other sites More sharing options...
BennehBoy Posted February 1, 2016 Share Posted February 1, 2016 Leak down test? Quote Link to comment Share on other sites More sharing options...
Eightpot Posted February 3, 2016 Author Share Posted February 3, 2016 There's a little improvement in runni g since fitting new washers and getting the injector seats spanking clean. I'm leaning towards a theory that a previous leaky washer may have helped wear the rings a little quicker and washed away any carbon. I'll get a few miles on it and if the crank case pressure doesn't recede I'll maybe whip the head off and get a proper look. Just a shame it's such an expensive exercise taking the heads off these buggers.. Quote Link to comment Share on other sites More sharing options...
Shackleton Posted February 4, 2016 Share Posted February 4, 2016 It sounds like the best thing at this juncture. Let us know what you find, and good luck! George Quote Link to comment Share on other sites More sharing options...
BennehBoy Posted July 5, 2016 Share Posted July 5, 2016 Did things improve? Quote Link to comment Share on other sites More sharing options...
BogMonster Posted July 8, 2016 Share Posted July 8, 2016 Due to the design of the Td5 fuel rail you will quickly find out about an injector washing blowing, because the engine will stop! This is because a compression leak will leak gas into the fuel rail in the head, which will aerate the fuel. Not an uncommon problem - non start, rough running or random dying of the engine can all be caused by compression pressure leaking into the fuel rail. Quote Link to comment Share on other sites More sharing options...
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