were the valve tappets adjusted correctly they need to be rotated during adjustments ,also make sure you have correct viscosity oil in engine. it has hydraulic lifters and if oil is cheap, it will aerate and cause rattling
You can adjust tapping valves by adjusting the lifters.
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.
Dodge Rams are known for their ticking due to "noisy lifters". This problem has been ID'd by some individuals as Dodge's use of cheap Chinese made lifters for their 5.7s. To get rid of this you would actually need to replace the lifters with after market lifters. Now if you're referring to a tapping+fluttering sound when you accelerate then you will most likely need to check on your valves.
Actually "tappets" is a term that has not been used for a l;tong time. Yu are probably referring to the valves or lifters. If you are having a tapping sound coming from the top of your engine, the rockers probably have to be adjusted or there may be a problem with lifters or pushrods.
have your valves adjusted adjust your valves
If it has hydraulic lifters, you do not adjust the valves.
You have hydraulic lifters. You don't adjustment them.
the valves are not adjustable they have lifters on top of the valves and cant be adjusted
It will cost approximately $400 to repair the lifters on your 2000 Toyota Camry. It can cost is much as $800 to repair the valves.
Assuming solid lifters (as opposed to hydraulic, self-adjusting lifters) you could burn valves if the lifters are adjusted too tight or have excessive valve clatter if the lifters are adjusted too loose.
Not to worry it is the valves in the engine tapping because there is not enough oil pressure yet for the fluid lifters to take up the slack in the valve train, that is why it goes away after a few minutes and also why you should always let your engine warm up before driving. a rod nock
can the valves be adjusted on a 1998 454 7.4 vortex with the roller lifters