Knocking after oil cooler replacement…help would be greatly appreciated

fasttimes

New Member
Joined
Jan 24, 2023
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3
Location
Socorro, TX
I did the oil cooler replacement, but, one problem into the next. I did the replacement, but now, there’s an odd knocking coming from my Jeep, engine compartment. Went to my guy, trusted on a complete level, and they reviewed the camshafts, replaced the rocker arms and and the push-rods(or equivalent), even replaced the connecting rod bearings. She runs fine, but the knocking happens at startup, then calms down a bit when the engine warms up. After that, the knocking picks up at acceleration, seeming to die down after going 25 mph, but, it persists. Anyone have any ideas, things to consider from here?
 
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fasttimes

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Jan 24, 2023
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Location
Socorro, TX
If it has an automatic transmission have you inspected the flexplate for cracks?
Right, my bad. It’s a 2013 with a 3.6L Pentastar. Automatic transmission, about to hit 60K miles.
Negative, but nothing was touched on the transmission, solely the engine. When the oil cooler was replaced, we did get a Mopar cooler, but one of the sides of the cooler cracked. Got an aftermarket one (Standard brand), and it’s holding just fine, but the knocking started once we put the Mopar oil cooler assembly in, and remains now.
And to clarify, (I apologize, first time posting to the forum), the knock is present at idle, but quiets down to barely anything once the block warms up.
 

WestCoastDan

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Mar 28, 2022
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SoCal
It is my guess that the volume of oil in the line & cooler has dropped the level in the oil pan enough that the oil pump is not providing sufficient volume to the top end at/near idle to avoid the noise.
Did you increase the volume of oil in the engine to compensate for what the oil cooler requires?
 
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fasttimes

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Jan 24, 2023
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Socorro, TX
After the fact, we measured the oil, seen it dio, so topped off the oil on level ground to optimal zone. That’s what has me scratching my head, oil is exactly where it should be.
 

Billybob12

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Jan 26, 2023
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Houma
I had allowed clattering Nord noise after I change my oil cooler and it finally quit I just gave it about $4,000 RPMs and held it there for a while and it just went away