Trumpy Posted March 23, 2021 Report Share Posted March 23, 2021 Hi all , I removed the injectors on my 5 last night to get them checked and cleaned and discovered the injector on no6 cylinder has no tip! ( snapped off. ) My first thought was that I had been clumsy and snapped it off removing it but I know I was careful. Is there any reason why a tip should get damaged in situ ? . I find it hard to believe the previous owner would have fitted a broken injector. This of course means the tip has passed through the engine but fortunately with no outward signs of damage . Thanks, Dave Quote Link to post Share on other sites
Motorsport Mickey Posted March 23, 2021 Report Share Posted March 23, 2021 I would get a camera into the cylinder, if you are unlucky it could be stuck in the piston top, if so I'd remove head and pull it out. It's always possible it could give a hot spot or become loosened and again wedged somewhere else. I hope you are right and it's blown through. Mick Richards Quote Link to post Share on other sites
Ian Vincent Posted March 23, 2021 Report Share Posted March 23, 2021 Is it a magnetic material? If so, could you fish for it with a magnet on a stick? Rgds Ian Quote Link to post Share on other sites
Harbottle Posted March 23, 2021 Report Share Posted March 23, 2021 Are the injectors the same design? hard to tell from the photo but they look different. I have I think seen injectors with no tip just some small holes! (or did I dream that). Paul Quote Link to post Share on other sites
Mike Collins Posted March 23, 2021 Report Share Posted March 23, 2021 No dream, some of my injectors have had smooth ends. Mike Quote Link to post Share on other sites
john.r.davies Posted March 23, 2021 Report Share Posted March 23, 2021 There are injectors that don't have the 'needle' on the tip. Ah, Mike got there first. It should be clear if one has broken off, although you mght need a hand lens! Quote Link to post Share on other sites
Trumpy Posted March 23, 2021 Author Report Share Posted March 23, 2021 It is a bit worrying thinking that tip may be in the cylinder. I have had as good look in there as possible and used a magnetic screwdriver in the hope it may pick something up. A camera will be the best way to be sure . I’ll recheck the serial nos n the injector. One does look slightly different but not that one , apart from the missing tip. I can see from previous receipts that it had 5 inj checked and one replaced a few years ago . Seems a coincidence? The car had some running issues when cold but no6 cyl has definitely been firing , I’ll check the injector end with a magnifying glass and see if it looks broken. If it is a different type that’s the best result! thanks . D Quote Link to post Share on other sites
BlueTR3A-5EKT Posted March 23, 2021 Report Share Posted March 23, 2021 As stated. They were made with and without the needle. PITA ....When selling exchange injectors there is going to be someone who must have identical to those that are removed. ie screwed on or push on insulator, with or without needle. Peter W Quote Link to post Share on other sites
Trumpy Posted March 23, 2021 Author Report Share Posted March 23, 2021 Would the short ended injector have a different part no though? my short one has 14 - 69. 73045A identical to a needled one . Needled injectors all have the same 73045A but some have differing prefix no’s 47 - 69 / 6 - 69 / 14 - 71 Even looking at the end through a magnifying glass it’s not clear either way but as the car was running i think it’s most likely Ok . Quote Link to post Share on other sites
Trumpy Posted March 23, 2021 Author Report Share Posted March 23, 2021 Quote Link to post Share on other sites
Bill944T Posted March 23, 2021 Report Share Posted March 23, 2021 47 - 69 / 6 - 69 / 14 - 71 These are the week and year of manufacture. Regards Bill Quote Link to post Share on other sites
Trumpy Posted March 23, 2021 Author Report Share Posted March 23, 2021 Ah , makes sense thanks . So all the same . Quote Link to post Share on other sites
stillp Posted March 23, 2021 Report Share Posted March 23, 2021 That doesn't look broken to me. Pete Quote Link to post Share on other sites
Trumpy Posted March 23, 2021 Author Report Share Posted March 23, 2021 I agree, and the holes are just visible . I think I’ll get all 6 checked and cleaned . thanks all . Dave Quote Link to post Share on other sites
Tim D. Posted March 27, 2021 Report Share Posted March 27, 2021 You were luckier than I was. This is the state of one of my injectors after a drive to spa to watch the racing. Tim Quote Link to post Share on other sites
Trumpy Posted April 11, 2021 Author Report Share Posted April 11, 2021 Quick update, I took the injectors to a local specialist for testing. The results ranged from poor to awful. so in a moment of rashness I called at Rimmer’s and invested in a new set . Fitted and bled , car now starts ‘on the button’ and after a minute or two settles down and runs smoothly. Was going for a test run but it started snowing! Also compression tested, showed a v healthy 14bar av across the 6 cylinders . (200psi) . Is this higher than normal ? Hoping all will now be good for the summer Quote Link to post Share on other sites
Steves_TR6 Posted April 12, 2021 Report Share Posted April 12, 2021 Thats great news, apart from the snow part ! Quote Link to post Share on other sites
openroad Posted April 12, 2021 Report Share Posted April 12, 2021 Morning Dave (trumpy) I too have some injectors without nibs on. Neil Ferguson assured me that these are not broken ones , and just as effective as the nibbed ones. Just thought I would add that bit of information. Cheers, Conrad. Quote Link to post Share on other sites
Trumpy Posted April 12, 2021 Author Report Share Posted April 12, 2021 Thanks , yes I don’t know the purpose of the nib end , makes it easier to bleed ? I wasn’t going to admit this but one new injector slipped from my hand and sprung on the plastic pipe against the head breaking the nib off. (Anyone this side of Nottingham would’ve heard the swearing ) . It still seems to have a good conical mist though, visually the same as the others so it’s been fitted . Quote Link to post Share on other sites
openroad Posted April 12, 2021 Report Share Posted April 12, 2021 I am North of Nottingham, yes, I think I did hear something strange. Conrad. Quote Link to post Share on other sites
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