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Collapsed hydraulic valve lifter? Rocker arm (valves) need adjusting?
It could be a sticking hydraulic lifter or valves that are slightly out of adjustment.
A clicking noise in the engine of a 91 Ranger could indicate a problem with the valves. A valve lifter in the engine may be worn or stuck.
Tapping valves is a noise made by too much clearance between the valve lifter and the valve. Modern engines have hydraulic lifters. If you have too little oil pressure or run the engine low on oil, the lifters will make noise. The lifter can also wear out.
You don't... Hydraulic tappets are fitted. If they make a tapping noise occasionally that goes away get used to it, or add hydraulic tappet cleaner additive to the engine oil after an oil change. If they constantly make the tapping noise it's time to get them checked out. Could be expensive!
Hydraulic shock from quick closing valves and can cause piping to rupture Hydraulic shock from quick closing valves and can cause piping to rupture
hydraulic lifter? Rocker arm?
it could be your valves or your engine
Stuck hydraulic lifter.
your engine is loud because, the fan makes that noise
Its the variator on the intake camshaft that is making the noise put engine flush into to the engine run it for ten minutes and then change the oil and the noise will be gone.
Most likely it's your valves in need of adjustment.