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Posted: Sun Feb 12, 2006 8:10 pm
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Posted: Mon Feb 13, 2006 9:15 am
Have you had the valve clearences done lately?
Posted: Mon Feb 13, 2006 10:43 am
It could be tappets, My Surf does the same thing, or only with fresh oil for the first 1500k's on fresh oil then the noise dissapears, haven't attempted adjusting the valves on them, don't think they are adjustable on mine ?
Posted: Mon Feb 13, 2006 11:32 am
i would have thought the valves would have made right through the rev range not only at 2000rpm ? But I havent checked them lately, bugger of a job
Posted: Mon Feb 13, 2006 2:09 pm
Mine has a ticking audible around the same range and it comes from the wax pellet device (ASCD = Assisted Cold Start Device?) on the fuel pump. The sound disappears when the lever is forced forward off the plunger on the device. Been meaning to fix it, but too lazy 
Dave
Dave
Posted: Mon Feb 13, 2006 3:27 pm
where is it on the pump (ACSD) is it more of a rattle? Mine makes a rythmic tapping noise not so much a rattle, wondering if it might be just piston slap
Posted: Mon Feb 13, 2006 3:47 pm
The ACSD is the device that has a coolant line going in and out of the back. The plunger presses on a spring loaded arm to the side opposite from the engine. The noise on mine is a rhythmic tapping as well.
Dave
Dave
Re: 1 HD-T Ticking noise
Posted: Mon Feb 13, 2006 4:40 pm
I think you hit it in one...have the timing checked by someone with a diesel timing light....it will probably be too advanced.red80 wrote:1 HD-T has a ticking noise around 2000rpm, only under acceleration or free revving not on deceleration, I checked and replaced big ends (doesn't sound like bearings anyway) and have reco'd all injectors, doesn't loose power and I don't think it's exhaust leak. Could this be the pump or timimg? any ideas diesel gurus
Andrew
Posted: Thu Feb 16, 2006 2:14 pm
My 1HD-FT had a ticking noise for a while then I broke a rocker bridge and bent a valve which the piston hit... cost me a rebuild... make sure you get the tappets adjusted... i think my engine failed because of worn collets tho.