1998 ford Econovan tappet adjustment please fast

Valve clearances are the small gaps between the tops of the valve stems and the part of the mechanism which presses on them to open the valves . Check the clearances at regular intervals as specified in the car service schedule, and adjust if necessary. Reset the clearances whenever the cylinder head has been removed.
https://www.howacarworks.com/engine/checking-and-adjusting-valves

I'm sure it'd be hard to find...
You could try asking for help from a Ford dealer.

Both the 2.0 liter 4-cylinder, and the 2.5 liter V6 are overhead cam engines. While all years of the V6 us hydraulic tappets, the 4-cylinder engines varied. From 1998 and earlier, they had hydraulic tappets. From 1999 on, they used shimmed mechanical tappets. Adjusting valve clearance on the later engines is a little involved, and, if you're not familiar with the procedure, it is perhaps best left to a professional mechanic who is familiar with the engine.

i would say no if it comes apart it may or will do lots of damage
any more help just let me know

stockam auto

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Hydraulic tappets are normally zero lash ... not adjustable. That is why they are hydraulic ... the lifter takes up all the 'clearance' and is automatically adjustable.

There's NO code for noisy lifters. Depending on miles and previous maintenance (oil changes, etc) your lofters are probably worn. They need to be replaced and you might have an oil pressure test done to make sure there's is adequate oil pressure.

have your engine valve tappets adjusted to its specified adjustment by a competent mechanic then if the noise is still there then you need to have the engine timing checked. if these doesnt solve the problem then you need to pulldown the cylinder head to inspect the camshaft condition...

As I Understand the, the KA has a 1300 cc Ford Cortina or Escort cast iron engine. Therefore the tappet adjustment is the same as always. Place the cylinder on TDC compression stroke and adjust the tappets on its paired cylinder. IE 1->4: 2->3: etc.

alot of the 4clys had ajustable tappets that might need adjusting
V6 have tappets adjusted also but are shims on top of bucket over valve spring, this is hard to do as you may need to change shims to get correct valve clearances suggest dealer to do.
if the noise comes in and out while maintaining 1500-2000rpm when stationary it is possibly worn valve guides which is common on high km vehicle.(head repairs)

id say u have lifter problem not sure if u can adjust them some u can tho