---------------------------------------------------------- Engines-List Digest Archive --- Total Messages Posted Thu 01/15/04: 3 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 02:50 PM - OATs & new engine (D Ford) 2. 04:15 PM - Re: OATs & new engine (Archie) 3. 05:07 PM - Re: OATs & new engine (Wes Hobbs) ________________________________ Message 1 _____________________________________ Time: 02:50:58 PM PST US From: "D Ford" Subject: Engines-List: OATs & new engine --> Engines-List message posted by: "D Ford" I am ready for my first flight in my RV but have hesitation due to OAT and breaking in my overhauled engine. Is there any reason that the CHTs would be too low to break in the rings? This weekend shoud be 15 to 25 degF, currently it's below 10 deg. Someone told me to wait until it's above 30 deg. Looking for more experience here... Dave Ford RV6 ________________________________ Message 2 _____________________________________ Time: 04:15:12 PM PST US From: "Archie" Subject: Re: Engines-List: OATs & new engine --> Engines-List message posted by: "Archie" > --> Engines-List message posted by: "D Ford" > > I am ready for my first flight in my RV but have hesitation due to OAT and breaking in my overhauled engine. Is there any reason that the CHTs would be too low to break in the rings? This weekend shoud be 15 to 25 degF, currently it's below 10 deg. Someone told me to wait until it's above 30 deg. Looking for more experience here... > > Dave Ford > RV6 Cooler weather temps are great for break-in. Perhaps the hesitation is due to a cold engine on startup. If your engine was overhauled using standard aircraft design rings, and cross-hatched cylinders, you can expect an elevation in cyl temps due to the friction of the rings attempting to seat and conform to the cylinders. Under these conditions, just keep the nose down to insure an adequate supply of air during the higher cyl temps. ________________________________ Message 3 _____________________________________ Time: 05:07:58 PM PST US From: "Wes Hobbs" Subject: Re: Engines-List: OATs & new engine --> Engines-List message posted by: "Wes Hobbs" Dave, You didn't say what type engine----Assuming it's an aircooled lyc. preheat engine overnight with a 750 W heater and go fly. The cold air will help cool the cyls. and increase the BMEP which is required to seat the rings. Full throttle should do it at 3500' msl in about 20 minutes.------Wes ----- Original Message ----- From: "D Ford" Subject: Engines-List: OATs & new engine > --> Engines-List message posted by: "D Ford" > > I am ready for my first flight in my RV but have hesitation due to OAT and breaking in my overhauled engine. Is there any reason that the CHTs would be too low to break in the rings? This weekend shoud be 15 to 25 degF, currently it's below 10 deg. Someone told me to wait until it's above 30 deg. Looking for more experience here... > > Dave Ford > RV6 > >