Loud valve train

1. Engine Noise. With a bad oil pump sufficient engine oil will not get to all parts of the engine, especially the top end, and you will get engine noise with metal parts that would normally be lubricated and quiet knocking due to metal to metal contact. Engines with hydraulic lifters that become noisy can be a sign that they have insufficient oil supply. In addition to the hydraulic lifters, your valve train may begin to make noise if your oil pump begins to fail. Valve train components need to be properly lubricated as well. A bad oil pump can result in a lot of additional noise from your valve train system.

2. Higher engine temperature. Poor lubrication because of poor oil flow generated from the pump will cause friction in the engine and the engine temperature will rise. Good oil flow is essential for lubrication and reducing friction to a minimum.

3. Low oil pressure. The oil pump generates oil flow through the engine but tolerances between metal parts produce the oil pressure. Very worn engine bearings will result in low oil pressure. Thus a worn engine will have low oil pressure even though the oil pump may be fine and there is no issue with the oil pressure relief valve either. However you will also experience low oil pressure due to a failing oil pump because poor oil flow will also result in lower oil pressure.

If your oil pressure warning light has been triggered in your engine, the causes of the low pressure need to be properly investigated because the problem may not be with the oil pump. People replace oil pumps assuming that is always the problem and then still have low oil pressure because the pump was not the problem to begin with.

if your oil no pressure is confirmed by a pressure test /ticking noises dry upper valve train than either clogged or collapsed oil filter --oil pump screen damage /clogged and or failure of oil pump ====if not determined no oil pressure check oil filter change if necessary check and test oil pressure sensor may be faulty or clogged/dirty

Hi Abner Clicking noise, if it goes with speed of engine and wasn't there before the valve train was adjusted. Take it back to be rechecked. If the valve train was adjusted to try and get rid of the clicking sound and it hasn't worked. The only thing you can do is get someone with technical knowledge to have a look at it. Unfortunately noises are somewhat impossible to diagnose unless you are standing at the vehicle. ( check engine oil level).
Blower motor one of four things (1) Poor electrical connection ( loose or slightly burnt connection to motor remove connector and check). repair or replace as necessary. (2) Something stopping the fan from turning (if pollen filter fitted above motor remove and with a mirror and torch check down inside on top of fan. (3) if a heater rheostat/resister is fitted in the location of the heater box this maybe faulty however when these fault it normally allows the fan to only work when you switch fan to maximum speed. (4) the fan itself is faulty . replace fan/motor. Good luck

If the engine is not making loud valve train sounds or rod knocking sounds, consider changing the oil pressure sender.

I don't think it would be the oil pump

Oiling problems over the years & a valve train
issue-- maybe

If noise is coming from inside the front engine
cover, or you hear it at front of motor under
the valve covers,then timing chain guides are worn

ticking can be a few problems that are not terminal first check oil if low top off and see if noise quiets down if oil good than have oil pressure checked -may be clogging or bad oil pump-check check where the ticking is coming from if its the head area than possible need to clean repair or replace a valve train part-[clogged push rod ,bad/need adjustment rocker sticking /bent valve oil return clogging /sludge] if coming from front of engine check the pulleys and water pump or fan for damage or debris a ticking noise usually is a noise that can be repaired just need to pinpoint the location

check your oil. If it is frothy or gray then you have water in it and that means you have a blown head gasket. If there is oil in the radiator then the same holds true.

The nocking could be from a failed oil pump as well. If the oil pump fails then the car will not start. You have to remove the oil pan to replace the pump.

You might have a bad hydraulic valve lifter (assuming this engine has them)... you could try an aftermarket product designed to unstick valve lifters.... any auto parts store carries them.

I would say probably not a weak oil pump...

Visit http://www.ratwell.com/technical/HydraulicLifters.html for a good explanation on how hydraulic lifters work.

Might be a bad valve adjustment (yes, valvetrains with hydraulic lifters still have some kind of adjusting mechanism), or lifters which get airlocked (bleed down fast and have a hard time pumping back up by themselves)

The oil light is a measurement of the oil pressure inside the the motor. It is not an indicator of how much oil is in the engine, and it is not an indicator of oil in the wrong place inside the engine. There is an oil pump inside the oil pan which pumps oil under pressure to the moving parts as they turn. The oil travels to the main bearings first and to the valve train last. When the oil light comes on it means that either the sending unit is bad or that that there is low oil pressure. When there is low oil pressure, then the moving parts are not being lubricated to the extent that the engineers intended. If the engine does not get oil to the moving parts - IT WILL DESTROY ITSELF.