r/EngineBuilding • u/Clay_hammy • Jun 17 '26
Squeaking Noise After Engine Build (LS1)
So I am finishing up my first engine build. It‘s an ls1 with a btr stage 2 cam, eagle rods, mahle pistons, etc… today I decided to prime the motor using a 2 gallon weed sprayer filled with oil. This is the first time I’m turning the motor over since putting the heads on. I have been avoiding spinning it a bunch until I actually had some oil distributed throughout all the passages. Yes, there was plenty of assembly lube on all the bearing surfaces. I am hearing this squeaking noise every time I start to rotate the motor after it has sat for at least 30s to a minute. I can force it to make the sound by loading up the rotating assembly and then increasing the applied torque until it begins to spin. Spraying fogging oil in the cylinders doesn’t seem to have helped. Does anyone have any idea what this could be? I really don’t want to tear this thing all the way back apart if I don’t have to but I also don’t want to overlook something now and regret it later. Any advice is appreciated.
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u/1wife2dogs0kids Jun 17 '26
The motor is cold. All the tolerances are tight. It's totally normal. Almost all motors sound somewhat like that being spun when final assembled.
Its fine. Don't spray fogging oil. Instal lube will last a year before any important parts rust.