Interesting loss of oil pressure issue GM 6 Liter

[SteveSRT8]

Originally Posted By: DoubleWasp
I thought that was wrong.

I haven't had to buy a lot of LS engine parts for my fleet, but that price was jiving with what I know about parts pricing for this engine family.


That's the strong point! Engine repairs are unlikely even if cared for erratically.

 

[DoubleWasp]

No doubt. Owning a bunch of LS's is like having a bunch of bad a__ kids who stay out all night and never talk to you.

 

[terry274]

The person quoting $450 registered on this site 12/21/2016 and that was his first post.

 

[Ramblejam]

Originally Posted By: terry274
The person quoting $450 registered on this site 12/21/2016 and that was his first post.

Doesn't mean he's not correct:

"They diagnosed a faulty oil pressure sensor and replaced it at a cost of $463."

http://www.startribune.com/pickup-owner-sludges-his-way-to-some-costly-repairs/231953951/

 

[kc8adu]

i have seen 2 ls engines with sticky relief valves.its rare but not unheard of.no oil pressure on one start with lifter noise and the next ok.
Originally Posted By: DoubleWasp
Agree with everyone else. It's not the engine. Engine don't just come back from losing oil pressure. It's the sending unit.

 

[The_Eric]

Originally Posted By: LeakySeals
I just took a peek on Amazon when somebody quoted $450. Its actually $31.25. But whats interesting is what I noticed for "frequently bought together". A screen! If there actually is a screen ahead of the Pressure sender Maybe all thats wrong. Its clogged! Finding out is free

https://www.amazon.com/ACDelco-D1846A-Original-Equipment-Pressure/dp/B0016HPUS8/ref=au_as_r?_encoding=UTF8&Make=GMC%7C48&Model=Yukon%7C558&Year=2008%7C2008&ie=UTF8&n=15684181&newVehicle=1&s=automotive&vehicleId=1&vehicleType=automotive


Not trying to be sparky but that was mentioned several times in this thread already.

 

[SteveSRT8]

i have seen 2 ls engines with sticky relief valves.its rare but not unheard of.no oil pressure on one start with lifter noise and the next ok.

I have only seen one of those despite being exclusively GM here for decades. Oil pressure dropped suddenly during stationary operations. Engine went into limp mode and was repaired with a new pump assembly. Ran like a bear for years after. This one never became "unstuck"...

 

[Mortjr]

Unfortunately I was telling the truth that my stealer charged me $450 to replace the sender because they had to spend 2+ hours removing the intake manifold to get at it. My 6.2 doesn't have a screen below the sender. When replacing the sender didn't fix the problem, they offered to replace the oil pump for $1700 but because they couldn't guarantee that would fix the low oil pressure at cold start they recommended trading it in.

Any advice?