Cummins 870 oil pressure

[Rawze]

(12-14-2021 )Jstephens129 Wrote:  Not sure , bought the truck from someone who decided putting a used engine in it without doing any kind of rebuild while it was out of the truck , the old engine threw a rod so they put a low mile engine in from a local in town , I was told it had 600k miles on it but haven’t hooked up to old ecm to verify , old engine had 900k before it blew .. I’ve been just trying to fix previous owners screw ups and it’s been a job .. I’m ready to throw in the towel if this oil pump and tube doesn’t fix it .. sick of messing with it and like I said previously no one around us is that familiar with Cummins, I’ve reached out to haggai but they are so busy they keep scheduling a month out and sound like they don’t really want to mess with it so I’m just trying to do all I can myself

so why did you buy into a used, (according to you) hodged-up pile of crap to begin with then?. That would be the bigger question... and YES, things can be done right,., and YES, it can be made into something very reliable.. but things need to be done properly for that to happen.

[Jstephens129]

(12-14-2021 )Rawze Wrote:  

(12-14-2021 )Jstephens129 Wrote:  You think I should replace oil pump since I’ll be in there ??

you never mentioned how many miles/hours on it, history of things, nothing. Its anyone's guess towards what might be needed to be done without proper information.

Does the new style oil pump require shims ??

[Nostalgic]

(12-17-2021 )Jstephens129 Wrote:  

(12-14-2021 )Rawze Wrote:  

(12-14-2021 )Jstephens129 Wrote:  You think I should replace oil pump since I’ll be in there ??

you never mentioned how many miles/hours on it, history of things, nothing. Its anyone's guess towards what might be needed to be done without proper information.

Does the new style oil pump require shims ??

I see the term being used now and not clarified enough - do you mean MOUNTING shims? Then no. The new cast iron pumps do not use mounting shims. If the backlash is not within spec, you are to return the pump.

[Jstephens129]

(12-17-2021 )Nostalgic Wrote:  

(12-17-2021 )Jstephens129 Wrote:  

(12-14-2021 )Rawze Wrote:  

(12-14-2021 )Jstephens129 Wrote:  You think I should replace oil pump since I’ll be in there ??

you never mentioned how many miles/hours on it, history of things, nothing. Its anyone's guess towards what might be needed to be done without proper information.

Does the new style oil pump require shims ??

I see the term being used now and not clarified enough - do you mean MOUNTING shims? Then no. The new cast iron pumps do not use mounting shims. If the backlash is not within spec, you are to return the pump.

What if the pump still whines and it’s within specs

[tree98]

Do a search here In the Google search bar for " oil pump whine" it's been talked about quite a few times.

[Rawze]

(12-18-2021 )Jstephens129 Wrote:  What if the pump still whines and it’s within specs

Here is a related thread to read thru...
http://rawze.com/forums/showthread.php?t...1#pid59581

[Jstephens129]

(12-18-2021 )Rawze Wrote:  

(12-18-2021 )Jstephens129 Wrote:  What if the pump still whines and it’s within specs

Here is a related thread to read thru...
http://rawze.com/forums/showthread.php?t...1#pid59581

Yes it sounds like a supercharger and yes it’s within specs .. shi#t is driving me crazy and I haven’t even drove it , I hope it isn’t as loud after some miles .. it def fixed the oil pressure problem.. only takes 3 seconds from cold to get to 40 and almost instantly warm so it wasn’t all for nothing ..

[jjoshthomas074]

what's your oil pressure at 1600rpm at operating temp?

[Jstephens129]

At 1500 it’s 40-45