High oil pressure after replacing pump

[13matsc]

Hi guys,

My truck has had a leak from the oil pan gasket for some years now. Finally dropped the pan and installed a new fel-pro 1-piece gasket. At the same time i replaced the rear main seal and also the oil pump and pickup because why not when the pan was down. Put new 10-30 oil in, same type as always, but now the oil pressure is way higher than before.

The new oil pump is not the high pressure kind, and i replaced the oil pressure sending unit two years ago when it was acting up.

Now im 60 psi when high idle on cold start. Drops to about 45 when engine is warm and normal idle. About 55 psi when running 50-55 mph.

Before it would be about 35-40 when cold and 25-30 when idle on warm engine.

Should i be worried about a faulty new pump?

 

[legopnuematic]

I wouldn’t be worried about that at all.

 

[Grit dog]

Sounds just right. Although previous pump was also fine at those pressures.

 

[DoubleDingo]

Hi guys,

My truck has had a leak from the oil pan gasket for some years now. Finally dropped the pan and installed a new fel-pro 1-piece gasket. At the same time i replaced the rear main seal and also the oil pump and pickup because why not when the pan was down. Put new 10-30 oil in, same type as always, but now the oil pressure is way higher than before.

The new oil pump is not the high pressure kind, and i replaced the oil pressure sending unit two years ago when it was acting up.

Now im 60 psi when high idle on cold start. Drops to about 45 when engine is warm and normal idle. About 55 psi when running 50-55 mph.

Before it would be about 35-40 when cold and 25-30 when idle on warm engine.

Should i be worried about a faulty new pump?

Sounds like normal oil pressure to me. If you had worn main and rod bearings it may be lower, but I wouldn't sweat the numbers you're getting now, it's just a healthier pump in there

 

[Fastduramax]

Perfect, higher=better every time, 3 pumps, stock, high pressure stock volume, and high volume which naturally creates higher pressure... It's been a debate amongst enthusiasts and motor builders which is best since the beginning of time... Anyway IMO you just got a pump with either a healthier spring or a high pressure spring, there is no quality control on parts from chain parts stores anymore, I only buy genuine Melling and Moroso, that's a motors hart pump !