hi all, first post as I am stuck and hoping there is someone on here with more knowledge on my issue. as i cant find anything on here or other forums about it
about 12 months ago, i was experiencing extended cold cranks. puffs of white smoke on startup, with stuttering intermittently when driving and rattling/tapping. a round of refurbished injectors, fuel system flush and labour for about £900 total. apparently swarf in the injectors is common for the k9k lumps. it fixed nearly everything, until about 3 months ago.
my new issues are rattling (and not the usual diesel rattle), they occur when cruising along and hovering the throttle between full load and fully off throttle. it sounds like an extremely cold diesel engine, but it happens when hot or cold but quieter when hot. its quieter after a fresh tank of fuel, and does get worse when lower on fuel. i also get a rhythmic knock when in 3rd/4th and accelerate from 20mph to 40mph which increases in frequency with speed. Doesn’t sound like a bearing though.
My local garage, who I do trust as they weren’t wrong before, have said that its likely the tapping of the valve train. The noise going away when the engine is under load, due to the slack being taken up. Which makes sense to me, but peculiar that the fuel level affects it as well. They have said they're happy to take a look, but they wouldn't know how deep they will end up going £££
has anyone got any experience with this? I can try to get a video up to show the issues later. thanks in advance
about 12 months ago, i was experiencing extended cold cranks. puffs of white smoke on startup, with stuttering intermittently when driving and rattling/tapping. a round of refurbished injectors, fuel system flush and labour for about £900 total. apparently swarf in the injectors is common for the k9k lumps. it fixed nearly everything, until about 3 months ago.
my new issues are rattling (and not the usual diesel rattle), they occur when cruising along and hovering the throttle between full load and fully off throttle. it sounds like an extremely cold diesel engine, but it happens when hot or cold but quieter when hot. its quieter after a fresh tank of fuel, and does get worse when lower on fuel. i also get a rhythmic knock when in 3rd/4th and accelerate from 20mph to 40mph which increases in frequency with speed. Doesn’t sound like a bearing though.
My local garage, who I do trust as they weren’t wrong before, have said that its likely the tapping of the valve train. The noise going away when the engine is under load, due to the slack being taken up. Which makes sense to me, but peculiar that the fuel level affects it as well. They have said they're happy to take a look, but they wouldn't know how deep they will end up going £££
has anyone got any experience with this? I can try to get a video up to show the issues later. thanks in advance