break in a motor procedures
03-28-2007, 11:13 AM
#1
Thread Starter
Join Date: Jan 2007
Posts: 21
break in a motor procedures
I have a rebuilt 331 motor. Before I start it up I know I have to use conventional motor oil and prime the motor. I have a roller cam.
Is there a special procedure breaking in the motor with a roller cam. Do I have to rev the motor to 1500 rpm for 20 mintues?
Also will the stock distributor gear work with a roller cam? I know you have to use a steel distributor gear with a roller and a iron gear with a flat tappet cam.
Is there a special procedure breaking in the motor with a roller cam. Do I have to rev the motor to 1500 rpm for 20 mintues?
Also will the stock distributor gear work with a roller cam? I know you have to use a steel distributor gear with a roller and a iron gear with a flat tappet cam.
03-28-2007, 11:17 AM
#2
Join Date: Jan 2007
Posts: 19
RE: break in a motor procedures
03-28-2007, 01:31 PM
#3
6th Gear Member
Join Date: Feb 2006
Location:
Posts: 5,263
RE: break in a motor procedures
revving the motor for 20mins is for tappet cams not roller cams.
to seat the rings properly. warm the engine up
then drive it hard with no constant rpms or low rpm bogging loads
for about 30mins.
Let it cool down completely and repeat two more times
You're done.
DO NOT baby a new engine or let idle for hours
Rings need to flogged on a bit to seat properly and to score
the cylnider walls properly.
to seat the rings properly. warm the engine up
then drive it hard with no constant rpms or low rpm bogging loads
for about 30mins.
Let it cool down completely and repeat two more times
You're done.
DO NOT baby a new engine or let idle for hours
Rings need to flogged on a bit to seat properly and to score
the cylnider walls properly.
03-28-2007, 01:38 PM
#4
6th Gear Member
Join Date: Dec 2003
Location: cape giradeau,mo
Posts: 8,872
RE: break in a motor procedures
when i did mine...i use a 10-30 i run a 20 minute flog drive come back drain it and check for shavings.then put my synthetic in and run the snot out of it..nothing breacks then i know it's all good
03-28-2007, 04:44 PM
#6
Thread Starter
Join Date: Jan 2007
Posts: 21
RE: break in a motor procedures
So, after I start the motor, check/adjust timing, fuel pressure, verify that there are nofluid leaks, oil pressure, water temp and everything looks good, after the engine has warmed up to operating temperature, I then drive it like i stole it for 30 mintues, let it cool for 30 mintues than repeat the process 2 more times.
Should I go wot from a standstill to redline?
Should I go wot from a standstill to redline?
03-28-2007, 06:31 PM
#7
Join Date: Jan 2007
Posts: 19
RE: break in a motor procedures
I would not go to redline but don't be afraid to rev it up 5000 or so. Don't spin tires and also let off the gas and allow the engine to slow you down I.E. Not using brakes. Do different gears like 2nd from 20 to 60 WOT. Print out that article that I told you about and follow it. It's not a bible but a GREAT guide to follow!
03-28-2007, 06:36 PM
#8
5th Gear Member
Join Date: Jun 2005
Location: Frederick, Maryland.
Posts: 2,118
RE: break in a motor procedures
ORIGINAL: r.barn
revving the motor for 20mins is for tappet cams not roller cams.
to seat the rings properly. warm the engine up
then drive it hard with no constant rpms or low rpm bogging loads
for about 30mins.
Let it cool down completely and repeat two more times
You're done.
DO NOT baby a new engine or let idle for hours
Rings need to flogged on a bit to seat properly and to score
the cylnider walls properly.
revving the motor for 20mins is for tappet cams not roller cams.
to seat the rings properly. warm the engine up
then drive it hard with no constant rpms or low rpm bogging loads
for about 30mins.
Let it cool down completely and repeat two more times
You're done.
DO NOT baby a new engine or let idle for hours
Rings need to flogged on a bit to seat properly and to score
the cylnider walls properly.
03-28-2007, 11:00 PM
#9
6th Gear Member
Join Date: Dec 2006
Location: Citrus County, FL
Posts: 8,007
RE: break in a motor procedures
i try not to beat the crap outta them until the oil has been changed a couple times and it has some miles on em - but everything else sounds about right to me. ie, changing oil at like 10-20 miles, then 100-200, then 1000, then every 3000. varying rpms is good, excessive idling bad, etc, etc
Thread
Thread Starter
Forum
Replies
Last Post
jwog666
Pipes, Boost & Juice
11
12-27-2021 08:09 PM
logan409
4.6L (1996-2004 Modular) Mustang
10
09-26-2015 07:43 PM