Super73Nova
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Posts posted by Super73Nova
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This is a normal cold characteristic of these engines. It’s piston slap and after some heat gets in the piston is goes away. I’ve torn down engines on a few of your body style because it was pretty loud only to find nothing wrong. Some can get pretty noisy but like every Subaru pretty much, it’s normal!
MY18 FB25 Outback cold engine knock
in Sixth Generation Legacy (2015 -2019 )
Posted
I seriously thought it was rod knock on several because of how loud it was. My manger insisted I pull the engine and tear it down on one of the first ones because of how loud it was. Since the noise went away after a very brief warm up I told him it probably wasn’t a rod but he was the manager and knows more than anyone else .
I wouldn’t persue it at the dealer. Like you said a new shortblock going in could just cause more problems than it’s worth. I didn’t want to believe it was piston slap at first but it definitely is. Not sure what the pistons are made out of but it reminds me of how a forged piston acts.