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08-23-2010, 11:42 AM | #1 |
Member
Join Date: May 2010
Posts: 59
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how did you break in your motor?
hi. im getting ready to fire my new motor in the next couple of days. im running 20/50 valvoline vr-1 oil. i plan on priming the motor with the i.v. method on the back of the block ive read alot about on this site. my question is, at first start up what do most of you do? how long should i run it and at what rpm's. the motor is a 51 merc. thanks.
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08-23-2010, 11:57 AM | #2 |
Member
Join Date: May 2010
Location: Pottstown,Pa
Posts: 37
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Re: how did you break in your motor?
I would add a zinc supplement to the oil.
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08-23-2010, 12:08 PM | #3 |
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Join Date: May 2010
Location: Mill Valley,Ca.
Posts: 1,509
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Re: how did you break in your motor?
Start it, run at 1500-2000 rpm for 20 minutes to break in the cam. Retorqe the heads after a complete cool down... Drive normally, don't idle it more than you have to (cam lubing). Not too fast, go through the gears, put a load on it as you drive... Karl
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08-23-2010, 12:14 PM | #4 |
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Join Date: May 2010
Location: Oshkosh, Wi
Posts: 4,526
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Re: how did you break in your motor?
VR-1 has plenty of zinc. No need for an additive.
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08-23-2010, 12:20 PM | #5 |
Senior Member
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Re: how did you break in your motor?
Hasting Ring Co. break in procedure...
REAK-IN PROCEDUREBackSTARTING PROCEDURE 1. Set tappets, adjust carburetor and ignition timing as accurately as possible before starting engine.BREAK-IN PROCEDURE 1. Make a test run at 30 miles per hour and accelerate at full throttle to 50 miles per hour. Repeat the acceleration cycle from 30 to 50 miles per hour at least ten times. No further break-in is necessary. If traffic conditions will not permit this procedure, accelerate the engine rapidly several times through the intermediate gears during the check run. The object is to apply a load to the engine for short periods of time and in rapid succession soon after engine warm up. This action thrusts the piston rings against the cylinder wall with increased pressure and results in accelerated ring seating.PASSENGER CAR AND LIGHT TRUCK Drive vehicle normally but avoid sustained high speed during the first 100 miles.HEAVY DUTY TRUCKS AND BUSES If possible, place in light duty for first 50 miles. At no time should the engine be lugged. Lugging is said to exist when the engine does not respond to further depression of the accelerator.FARM TRACTORS Operate at one-half load or less for the first two hours. |
08-23-2010, 12:20 PM | #6 |
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Join Date: May 2010
Location: toledo ohio
Posts: 393
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Re: how did you break in your motor?
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