The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post - L31 break-in

406flyfish · 02-02-2019, 12:15 AM

I’ve put a bunch of these in. Gm has no break in process for the engine. It has a roller cam so no 1500rpm cam run in. I usually run it long enough for the thermostat to open and make sure it’s full of coolant set the timing and go for a drive.

02-02-2019, 12:15 AM	#8
406flyfish Registered User Join Date: Jul 2017 Location: Montana Posts: 30	Re: L31 break-in I’ve put a bunch of these in. Gm has no break in process for the engine. It has a roller cam so no 1500rpm cam run in. I usually run it long enough for the thermostat to open and make sure it’s full of coolant set the timing and go for a drive.