The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post - Just Bought a Crate Motor for my 97 GMC / Want to Re-Build Old Motor (1st timer)

**Captainfab** · 09-24-2012, 12:14 AM

The engine break in procedure is not nearly as critical with a roller cam engine as it is with a flat tappet cam engine. I would follow what ever GM recommends for the L31 engine. That will likely need to be documented for your warranty to be kept.

09-24-2012, 12:14 AM	#3
Captainfab 60-66 Nut Join Date: Mar 2007 Location: Coeur d'Alene, Idaho Posts: 23,246	Re: Just Bought a Crate Motor for my 97 GMC / Want to Re-Build Old Motor (1st timer) The engine break in procedure is not nearly as critical with a roller cam engine as it is with a flat tappet cam engine. I would follow what ever GM recommends for the L31 engine. That will likely need to be documented for your warranty to be kept. __________________ Power Steering Box Adapter Plates For Sale HERE Power Brake Booster Adapter Brackets For Sale '63-'66 HERE and '67-'72 HERE and '60-'62 HERE and "60-'62 with clutch HERE Rear Disc Brake Brackets For Sale. Impala SS calipers HERE Camaro Calipers HERE D52 Calipers HERE 6 Lug HERE Hydroboost Mounting Plates HERE