The lifters in the intake dont ther not making pressure agains the camshaf is this normal

Hi. I can give you a simple, but time consuming test to do to check your intermittent compression problem. New hydraulic lifters cause a lot of problems until its settled. Remove the camshafts and the hydraulic lifters. Take each hydraulic lifter and put it in a vice(becarefull not to damage them) and squeeze out all the oil in the lifters. Then put them back and replace camshaft and allign timing marks. Check compression ratio. What happens sometimes is that the oil pressure is too high(stuck oil pressure release valve or cold thick oil) and this causes the oil pressure to put so much pressure on the hydraulic lifters, that it slightly forces the valve open. That will cause your low compression as well as backfire through the intake.

Oil pump is failing. Dont keep driving the vehicle.

Before driving it anymore I would have someone test the actual oil pressure using a mechanical test gauge to see how much , or little, oil pressure you actually have. The knocking noise could be a hydraulic lifter that is partially collapsed due to low oil pressure or a rod bearing that has been damaged from low oil pressure. If it is just a lifter that is making noise then there's a pretty good chance that the lifter will quiet back down once the oil pressure is normal again. If it turns out that your oil pressure is normal both at an idle and at highway speeds then the noise may be unrelated. You can cause some serious damage by continuing to operate any engine that is low on oil pressure even if the dipstick shows it to be full of oil. Hope this helps and good luck!

I dont think and intake gasket will cause lifter noise. It may cause a rough idle and or a miss at idle on cold start up . as the engine warms up the miss or rough idle will decrease . As for the lifter noise this could be cause by the lifter bleeding down or poor oil presure . On your model of engine there is no adjustment on the rocker arms for lifter noise . They are a 0 lash type .

I have never heard of this before but if this is the case then cranking the engine will refill them with engine oil surely ,i mean how do they build them on the assembly line at 3 engines a minute then start them from new on the test bed before the engine leaves the assembly for the body plant .Are you sure something else isnt wrong like the vacumn pipe to the valve on the end of the fuel injector line ?

have u ck fuel filter,,or fuel pressure,,,

ticking sounds that are worse when cold usually indicate a lifter issue or valve train

Lifters require pulling the intake and the heads

the lifters are inside the engine under the intake manifold, you must remove the intake manifold, valve covers, rocker arms, and push rods. do you have a repair manual? I suggest Haynes or Chilton, if you do not have one check your local library, they may have one

HI you could do a oil pressure test whit a gauge or yest replace your oil pressure sending unite if engine is not making tapping sound when pressure reads low it may be a bad pressure switch.now the coolant problem may be bad intake gaskets look at 4 corners of intake for sign of coolant if you see it outside its probably getting inside your lifter valley.Hope this helps

The first thing you should do is change the oil filter. No matter how old it is. If that doesn't work repost.