Oil pump getting weak?

[Mrcherry3156]

I have an 06 2500hd with the 6.0 and on my first startup of the morning, usually temps are 70-80 outside, my engine sounds like my duramax! It's a combination of ticking and knocking but it goes away after I give it a good pump of the throttle. Almost seems like it's not getting enough oil until I goose it in park and then all is well and drives fine all day. Also when it sits for and hour or two, it will knock for about 3 seconds and then it goes away. Lifters? Oil pump? HELP!!!! This is my daily and I depend on it very much since I drive quite a bit for work. It has 199k on it. I have a video of the noise but no idea how to post it

[Jsdirt]

Sure sounds like low oil pressure from here. Only way to really be sure is to get a mechanical gauge on there in the morning, fire it up, and see what you've got.

 

Have you owned this one since it was new? Normally these problems seem to plague the 5.3 - has me wondering if it was abused in the beginning of it's life as far as maintenance goes.

[It's Tim]

What type and weight of oil, brand of filter?

[Mrcherry3156]

Unfortunately no, I bought it from a company in Georgia that specializes in trucks with tool bodies as it was a North Carolina gas company truck. When I purchased it it had 160k on it. The only issue I had was the diff was locked full time so I changed the fluid and put limited slip additive in it, did a couple figure 8's and it's been running strong ever since. Now I've also put 30k on it and it's been right at a year. So it's been used by me definitely, but nothing abusive. It has a service bed on it with a 30 gal gas powered compressor and the most it has hauled is my mower

[Mrcherry3156]

Oil and filter is Oriellys brand 5w-30 high mileage with AC Delco filter.

[Mrcherry3156]

 

Here is the noise. Forgot I had put it on YouTube.

[Jsdirt]

Doesn't sound good at all. I would prepare for a rebuild or long block soon. Is that an AFM engine (cylinder deactivation, or 4-cylinder mode during cruise)? If so the lifters are probably on their way out. Usually they fail totally and cause big time misfires, with the flashing check engine light. Not there yet - sounded like it was hitting on all 8.

 

Could be a worn timing chain slapping around too. She might have been run hard in the beginning of her life.

 

In the meantime, do an oil change with 15w-40 Rotella & see if that quiets things down any.

[Mrcherry3156]

My father in law works at a dealership here in Montgomery and he is kinda my got to guy for truck issues since he is a chevy tech and chevy feeds our family basically. Everyone in the family works for a chevy dealership lol. I asked him and send him the video and he said it could be a lifter bleeding down or an oil pump? How often does that stuff go out? I guess what I'm asking is, is it more likely that I'm gonna need a rebuild or is the lifter/ oil pump a common problem with these trucks? And I understand you can't accurately tell me with the only source of info being what I told you and the video, just your best educated guess

[Mrcherry3156]

Although oddly enough it wasn't near as bad this morning. It's been pretty consistent, until today. I fired it up to go to work and it did it for like 2 seconds and not near as hard of a knock and that was all

[Jsdirt]

The pump could be getting weak - if that's the case, I'm sure other things in the engine are worn out.

 

Usually the 6.0's hold up pretty good. Like I said prior, I think this one was run hard right out of the gate, up until you bought it. They may have ran several oil changes a bit longer than they should have.

 

I'm pretty much in the same boat - I've got impending cam bearing failure. My dilemma is, do I yank the thing now and fix it, or just wait until it grenades. At this point I'm so disgusted with the truck, I think I'll run it 'till it won't, and cross that bridge when it gets here. Another 5 years it'll be exempt, and I can drop whatever engine I want in there. An old school 502 is looking pretty good these days.

 

I'm only at 91k miles, btw ... and I've treated this engine no different than all my V8 GM engines I've owned the past nearly 3 decades. Only difference is nowadays I can afford to feed it Amsoil Signature Series constantly. Sure would be nice if GM could figure out how to build engines like they USED to ...

[sdeeter19555]

Isn't oil pressure dictated by main bearing clearance? Worn bearings = low oil pressure...

 

Sent from my SAMSUNG-SM-G900A using Tapatalk

[Jsdirt]

Lots of things will cause it - not just main bearings. My impending cam bearing failure has already lowered my oil pressure noticeably on the gauge.

 

If you gotta do main bearings, then how is the timing chain, head gaskets, rockers, lifters, cam, cam bearings, wrist pin clearance, piston/cylinder clearance? Might as well toss a long block in it or have it rebuilt at that stage.

[Dnt]

Your engine has significant wear. We have about 8 of these slightly older 3/4 ton 6.0's with 300k plus and every single one has noise at cold startup we just run them till they die and do not worry about it. Fresh engine and you are good for a couple hundred thousand more miles. I personally am glad they do not build them like they "USED to" LOL we were lucky 15 to 30 years ago to get 100k before significant problems. These dang things are awesome nowadays......

[Jsdirt]

You sound like you weren't around in those days. All my 70's and 80's cars I put well over 150k HARD abusive miles on, and NEVER ONCE did any of them burn oil like my 91k mile Silverado does.

 

My ol' man used to pull a 22' Prowler camper with his '76 Torino. Abused the hell out of that car. Sold it with over 200k on it in 1985. STILL running like a top.

 

My grandfather used to drive a Model T Ford from Central MA to Nova Scotia twice a year to see relatives. That's about as primitive an automobile as you can get. He broke down once - spun a bearing. Cut his belt off, wrapped the journal, and made the remaining 300+ miles of the trip, and drove it that way several months afterward. Used to go through tires and tubes alot, but what was basically the equivalent of an ATV trail will do that. Try driving these glorified wheeled Tupperware through the woods, and see how long it lasts ...

 

Grandfather took the whole family on a one month excursion across the country in the mid 50's. Not sure what model Ford it was (forgot). 10k miles, alot of it on dirt roads and blazing heat - never missed a beat.

 

Wife commutes 60 miles a day in a 31 year old Mercury Grand Marquis. 244k miles. Runs like a top, burns NO oil. Makes a little racket at startup, but 14 dry, spring starts will do that to an engine. ORIGINAL fuel pump. ORIGINAL p/s pump and steering box.

 

Sold my '94 K1500 with 266k miles - still running perfect, no smoke, no leaks. Changed the OE u-joints at 222k miles, and the OE ball joints a little before that - spent it's entire life in MA too.

 

The way people talk about anything that wasn't built yesterday, you'd wonder how the hell America became what it is today. The stuff worked. Wasn't as bad as everyone claims on the internet. Things were just a little rougher around the edges - something today's pampered poodles cannot tolerate.

[Swimmer8366]

I want to put big blocks or small blocks in everything. Old school 60's 70's amazing engines I put 275k on my 2002 6.0 still runs. But it's still nothing to an old school 302,350,454. Stuff now a days are just throw a way junk.

 

Sent from my Z981 using Tapatalk