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Oil Pump Failure- after changing oil lines
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gonefishin
New User
Nov 11, 2010, 8:34 AM
Post #1 of 5
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Oil Pump Failure- after changing oil lines
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2003 Yukon Denali XL, 6.0L, 124K miles
I have a 2003 GMC Yukon Denali with 124K miles and I am the original owner. It drives and runs perfectly, despite the miles it has on it. I took the vehicle in for scheduled maintenance to a local shop and was told that the oil cooler lines needed replacement. I agreed. I received a call from the mechanic saying that there was no oil pressure and that after a test drive the engine started ticking so they shut it down. They said they pulled the filter and there was not any oil being pumped. I was told that the oil was very dirty and that there was a metallic sheen to the oil. I have run synthetic in this engine from 5K miles to now, never going over 5K between changes, normally less than that. They told me that they needed to pull the pan to see if the pickup had fallen off or the screen was clogged. There was not a problem. They then said the pump needed to be looked at and indeed the pump had failed. I had not had any issues with regard to oil pressure, ever, in the past. One complicating matter is that the entire Gauge Cluster works intermittently at times and needs to be rebuilt. I advised them of this issue prior to allowing them to proceed with the work. Now I am stuck with an additional $1300 in charges and the real possibility that the engine was damaged. Here is my question: It seems that the probability of the pump going out, in their shop, at this time was very slim. I feel that it is more likely that when the oil cooler lines were changed, not enough care was taken to prevent debris from getting into the system and that as soon as the engine started, the debris was forced into the pump, causing the failure. What are your thoughts? What would you do? Thank you.
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re-tired
Veteran
/ Moderator
Nov 11, 2010, 11:27 PM
Post #2 of 5
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Re: Oil Pump Failure- after changing oil lines
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There is little chance of anything getting into the line...The lines are moved back a few inches new o rings put on and put back together. More likely is this.The eng has high mileage.The pump is a bit weak but as long as the system oil system is primed the pump can pick up the oil. The oil lines and cooler drained when lines were undone. Filter MAY have been put on without prefilling it , normally not a problem but with lines and filter empty the pump may not have been able to pickup the prime .Useing a thin weight syn oil in a high mileage motor did not help..IMO.....I would try another oil change with heavier oil. If eng is not making noise , drive a hundred miles and recheck for metal . If it makes noise after the change or makes metal on test drive. Then it's time to talk reman block , with a good discount on P&l. FALLS UNDER _ _IT HAPPENS.
LIFE'S SHORT GO FISH
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Hammer Time
Ultimate Carjunky
/ Moderator
Nov 12, 2010, 3:45 AM
Post #3 of 5
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Re: Oil Pump Failure- after changing oil lines
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One thing I would like to add here is that is you do decide to change the oil again, you cannot really use any oil heavier that 10W30 or you can do further damage. In years past you could put 20W50 or 10W40 in an older engine and it would help but doing that to the engines we have now will cause dry starts due to much smaller passage clearances.
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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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re-tired
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Nov 12, 2010, 3:44 PM
Post #4 of 5
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Re: Oil Pump Failure- after changing oil lines
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10w30 was what I had in mind ,should have said that. In FL i've had no problems with 10w40 , But probably not good in the rust belt. THX HT
LIFE'S SHORT GO FISH
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Hammer Time
Ultimate Carjunky
/ Moderator
Nov 12, 2010, 3:45 PM
Post #5 of 5
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Re: Oil Pump Failure- after changing oil lines
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I figured that, I just wanted to make sure he was clear on that.
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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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