Change oil pump without having engine out of car.

Hi
Is it possible to take out and put in a new oil pump in a 89 Bronco 5,0 without having the engine out of the truck.
And what is best high volume or high pressure pump.
The oil pressure is to low when engine is idling and trans in d,l or reverse.
But there’s no strange noises from the engine, it sounds very healthy. Only 126 000 km on the engine.
I have changed the oil pressure unit.

I’m thankful for any answers.

Regards
Per Arne Sund :banghead:
Norway

Hi
Is it possible to take out and put in a new oil pump in a 89 Bronco 5,0 without having the engine out of the truck.
And what is best high volume or high pressure pump.
The oil pressure is to low when engine is idling and trans in d,l or reverse.
But there’s no strange noises from the engine, it sounds very healthy. Only 126 000 km on the engine.
I have changed the oil pressure unit.

I’m thankful for any answers.

Regards
Per Arne Sund :banghead:
Norway

yes you can. you will disconnect a few things like cooler and cooling lines/hoses and starter and the exhaust and jack the motor up a few inches, you will drop the pan part way, reach around and unbolt the pickup from the pump and the #3 main cap and then drop both.

as for pump, use melling.

and doing all this work, change the rod and main bearings while in there with std size - std at this point is better than what you have BUT

are you SURE the pressure is low? drivers side, side of the motor right near the front is the oil pressure tap, put a T or a nipple with 2 street elbows and put in a REAL gauge. My ford 'N O R M A L' guage started reading low 3 years old and I put in a real gauge into the dash (lower left corner of the drivers dash is unused space for electric shift on the fly if you dont have it, a 2" sunpro fits there like a glove) today I run 52-53psi at highway speed and I have 222000 miles on original internals

yes you can. you will disconnect a few things like cooler and cooling lines/hoses and starter and the exhaust and jack the motor up a few inches, you will drop the pan part way, reach around and unbolt the pickup from the pump and the #3 main cap and then drop both.

as for pump, use melling.

and doing all this work, change the rod and main bearings while in there with std size - std at this point is better than what you have BUT

are you SURE the pressure is low? drivers side, side of the motor right near the front is the oil pressure tap, put a T or a nipple with 2 street elbows and put in a REAL gauge. My ford 'N O R M A L' guage started reading low 3 years old and I put in a real gauge into the dash (lower left corner of the drivers dash is unused space for electric shift on the fly if you dont have it, a 2" sunpro fits there like a glove) today I run 52-53psi at highway speed and I have 222000 miles on original internals
Thanks for the answer quaddriver.

I’m going to borrow a real oil pressure gauge from a friend and see how much pressure it really is.
The only thing I now about the engine is that they had of the intake manifold and take away a lot of thick oil. But I now they have changed the oil regularly, but I suppose not with a right kind of oil.