Hello to all and thank you for your help. I have been able to do incredible work over the years by merely reading and searching the forum, this is my first post, I am desperate. Thank you for all of the post over the years.
I have an 03 H2 (my 5th one). I am getting a very loud noise that sound like the engine is struggling from a dead stop, it is 10 times louder than and the same noise when using Air con. Oil pressure is very low at idle and quickly jumps up when I accelerate. I have blown the upper oil line on my radiator 3 times when I get on it (Upgraded to B Cool High performance Aluminium Radiator and added a high performance trans cooler to avoid the pink milkshake (again).
I have changed all the belts, all the tensioners, all the pullys, the oil filter, the oil, the oil sending unit, oil line. I also seem to have a drop in my power even though she is a beast with road rhino front end and rubber duck brush guard.
Is it my Oil pump? I do hope not, the engine has 180K on it with factory oil pump.
I have no check engine light and no codes.
Thanks to all.
CB

 

I also changed the fittings on the radiator and the clip.

 

If it is a roaring sound when taking off your fan clutch might be stuck. That would kill power as well as drag the idle down (and consequently reduce oil pressure). Not sure otherwise...

 

Thank you, I have never considered that at all. After having owned 2 H1's, 5 H2's and one H3 I thought if it could go wrong it had.
I will give that a check.