Farmerfred Posted October 26, 2018 Share Posted October 26, 2018 My '94 Defender 90 300TDi has developed an annoying noise coming from the injector pump after a very short while after starting the engine, this noise sounds like the clicker pointer on the 'wheel of fortune', does anyone know what exactly is causing this noise and what the cure would be?, this noise seems to be from the front of the pump as it sounds like it's coming from the timing case. Quote Link to comment Share on other sites More sharing options...
ianmayco68 Posted October 26, 2018 Share Posted October 26, 2018 Can’t tell you exactly what it might be unfortunately, but I’d check the viscous fan 1st they make a clicking noise when they’re catching on something and generally around the engine bay where anything rotates as noise can be deceiving in its origin , then if nothing is visible as much as it might be a pain I’d then strip the timing cover off just to be sure last thing you want is the timing belt going , unless someone else can say what it might be . Quote Link to comment Share on other sites More sharing options...
Farmerfred Posted October 26, 2018 Author Share Posted October 26, 2018 Right, here's the synopsis. Just had it back from having a total ground up rebuild and whilst the engine and box was out my tame mechanic changed out the timing/cam belt kit. The engine ran sweet for the first 50 odd miles but has now developed this ticking whirring noise that is being heard from the timing case in the injection pump area. He has removed the timing case cover and run the engine, all new parts of the kit, including the belt are undamaged, the noise is coming from the pump. I have trawled the 'net for possible causes of this and one in particular I came across was this one, hard to understand that the lift pump, in this instance, was the cause of the noise but am wondering weather this could be the cause of my noise, I hope so because after spending around 5K on the rebuild I am wincing at the prospect of having to shell out another K+ for a replacement injector pump. There are 4 short videos to watch. Quote Link to comment Share on other sites More sharing options...
ianmayco68 Posted October 26, 2018 Share Posted October 26, 2018 I had a quick look on the net before leaving for work, did find a post , 300tdi had ticking noise from the pump it turned out to be a hardened shaft in the fip, refurbished ones are £420 on eBay from a diesel specialist, but if you have one near you take the fip off and get them to check it they might do it cheaper , but if it’s possible it’s the lift pump I’d change that 1st as they aren’t expensive . just found this it’s about a 200tdi but set up the same says might be fuel starvation because lift pump isn’t working rite . https://forums.lr4x4.com/topic/87197-potential-injection-pump-noise/ Quote Link to comment Share on other sites More sharing options...
dailysleaze Posted October 26, 2018 Share Posted October 26, 2018 I mechanic's stethoscope will tell you exactly where the noise is coming from. They're only £5-10. It'll help you rule out the lift pump and vacuum pump on that side of the engine before you go spending £100s on an new injector pump. Quote Link to comment Share on other sites More sharing options...
Farmerfred Posted October 26, 2018 Author Share Posted October 26, 2018 My mechanic is picking up a stethoscope, he said he was passing a local diesel specialist centre so he's dropping in there to pick their brains, he rang me at 08.30 this morning, I haven't heard anything from him since so I expect he's working on it. Thanks chaps for the input so far. Quote Link to comment Share on other sites More sharing options...
Bowie69 Posted October 26, 2018 Share Posted October 26, 2018 Sounds very like a chuffing noise from a head gasket, exhaust or vacuum pump... Hope you get it sorted. Quote Link to comment Share on other sites More sharing options...
Farmerfred Posted October 26, 2018 Author Share Posted October 26, 2018 None of the above Bowie I don't think, if the vacuum pump was the culprit there would be no or very hard brakes, head gasket is okay and so's the exhaust, it's not a chuffing noise, as in escape of air or gasses, it's a clicking noise, like what you would hear if you ran a stick across a length of iron railings. Quote Link to comment Share on other sites More sharing options...
steve b Posted October 26, 2018 Share Posted October 26, 2018 The last time I had one in with this noise it was air getting into the fuel feed to the pump - it had an inline filter bodged into the feed line and it was leaking air into the fuel line but not diesel out even when switched off . It sounded like the FIP was about to dis-integrate ... cheers Steve b Quote Link to comment Share on other sites More sharing options...
EeEk Posted October 26, 2018 Share Posted October 26, 2018 air in the fuel check for leaks drawing air in to the fuel line somewhere, run it from a gravity tank Quote Link to comment Share on other sites More sharing options...
Farmerfred Posted October 26, 2018 Author Share Posted October 26, 2018 Thanks guys. The air ingress without leakage of fuel could be plausible, the fuel lines have been disconnected in the rebuild process as everything had to be disassembled, tank to lift pump feed in particular, just seems rather odd that it's done 98 miles since and only now manifested itself but again, air getting in could be the issue if the fuel line is not particularly tight and vibration has moved it. Strange though that the engine is not lacking power, revs or 'pinking' at all. I'm sure the cause will be fathomed out eventually. Quote Link to comment Share on other sites More sharing options...
Farmerfred Posted November 8, 2018 Author Share Posted November 8, 2018 By a process of elimination this noise is pointing to the injector pump. Fitted a new lift pump but that made no difference so replacing the injector pump will be the next step. Ringing around the L R specialists has not given any definitive answers either although several suggestions have been offered, a few of which have been plausible, others quite ludicrous and coming from one specialist doesn't give one much confidence in asking them for advice again. One told me that his 200TDi Discovery has had the same noise for 2 years, okay I suppose if you don't care or can live with an engine that sounds like a bag of nails. I'll report back when the injector pump has been changed. Quote Link to comment Share on other sites More sharing options...
Farmerfred Posted December 21, 2018 Author Share Posted December 21, 2018 After a lot of processes of elimination and ringing nearly all the LR specialists in the Country and getting nowhere the cause of this noise has finally been found, and even that was only by pure chance. The problem was with one of the plastic fuel lines having chafe marks on it which were deep enough evidently to cause air to be pulled in but no fuel leaking out, new pipe fitted, noise gone! The chaffing was discovered after the engine finally decided to miss and loose power and subsequent inspection of the fuel lines in greater detail and replacing said line has now cured the problem of the noise. Thanks to all for the input. Quote Link to comment Share on other sites More sharing options...
steve b Posted December 21, 2018 Share Posted December 21, 2018 Good to hear that it was found cheers Steve b Quote Link to comment Share on other sites More sharing options...
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