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Have your valve lash adjusted. Overhead cams need the lash done every 25-30K otherwise after some time they make a loud ticking sound. If the motor makes a "Knocking" sound, it may be a lower end noise, and there is no adjustment for that.
these are known for carbon build up on the valves that cause several problems.this could be the problem as the carbon can cause the valves to stick a bit in the valve guides while its running and show up as a ticking noise with the gas applied.have the top end service done which cleans the fuel system injectors and any carbon build up on the back of the valves.if this gets bad enough it can cause the cam holders to break locking up the motor if the piston hits the valve.another thing to check is oil pressure and the lifters may be worn to the point that they need replacing.check the cam lobes as well if worn these can cause a ticking noise on acceleration.
pritty much. The lifters are making the sound. Chevy motors do it as well. I do not like it but both manufacturers say it is ok. I do not hink they should have metal on metal like that. The only 2 things that the triton was known for is the head gaskets leaking from the head on the rear passenger side of the motor down on the starter and coolant leaking from the heater core hose down on the passenger rear coil and spark plug. Good motors they seem to run for ever.
A small exhaust leak can sound like a ticking noise during acceleration and can get better or worse as the system heats up. I had a similar problem when the engine was cold that was solved with a new exhaust manifold gasket.