rebuilding a motor...

landslideATX · Post by **landslideATX** » Tue Oct 20, 2009 2:20 am

ok. i'm getting another motor to rebuild and drop in to get my car running again. i have a few questions. i have a 4-1 header. can i put that on rebuilt motor and do a new exhaust (having done at muffler shop for now) or should i run the stock headers to break in the motor? whats a good motor break in? i.e. time and style or driving and so forth. this is my first time rebuilding a motor so any direction you can point me in to help me out would be greatly appreciated.

thanks,
daniel

mooreofmick · Post by **mooreofmick** » Tue Oct 20, 2009 2:51 am

first off header doesnt matter second to break a motor in is first time to start a frash motor prime the oil system then run the motor until it reachs operating temp let it cool down change oil then drive it how u r going to drive it never let it stay at an rpm for long i.e. highway speeds always run though the rpm range other than that you should be good

mooreofit · Post by **mooreofit** » Tue Oct 20, 2009 6:39 am

theres no such thing as break in!

i let my cam seat for 20mins after first start up then its balls to the wall!

mandm177 · Post by **mandm177** » Tue Oct 20, 2009 9:19 am

mooreofit wrote:theres no such thing as break in!

ditto. I bought a new 350Z with 20 miles on the odometer, drove it to work and stuff, and that weekend autocrossed it with about 400 miles on the odometer, and its still running strong. Threw the break-in schedule out the window

mexellent · Post by **mexellent** » Tue Oct 20, 2009 9:36 am

We got an 07 honda fit. I made sure as soon as I could that I took it all the way to redline under power and coasted back down to idle ASAP. That way it helps seat the piston rings.

MadeInThe80s · Post by **MadeInThe80s** » Tue Oct 20, 2009 9:40 am

From what Ive gathered break in time is a non issue. If the motor is built right, there is no reason to "break" it in. I remember reading an article awhile back about an interview with a guy who had been building custom cars/motors for a long time and he said he never broke his in. Balls to the wall from the very beginning once it was tuned right.

If it breaks, it wasnt from breaking it in right, it was from building it wrong.

landslideATX · Post by **landslideATX** » Tue Oct 20, 2009 11:56 am

mexellent wrote:We got an 07 honda fit. I made sure as soon as I could that I took it all the way to redline under power and coasted back down to idle ASAP. That way it helps seat the piston rings.

is that every gear or just first?

GTSRolla34 · Post by **GTSRolla34** » Tue Oct 20, 2009 1:27 pm

Break it in hard:

http://www.mototuneusa.com/break_in_secrets.htm

gda03subaru · Post by **gda03subaru** » Tue Oct 20, 2009 4:59 pm

make sure to use assembly lube, fill the pick up tube with the assembly lube as well, run non detergent oil for the first 500 miles and thats about it, if done this way all motors will have the rings seat properly and i hate dry starts so it should last a very long time if built properly

mooreofit · Post by **mooreofit** » Tue Oct 20, 2009 6:55 pm

stay away from the lithium!!!!!!!! assembly lube that is it will clog up your pickup screen and take out your motor.

gda03subaru · Post by **gda03subaru** » Tue Oct 20, 2009 11:43 pm

lucas assy lube.... all the way

Post by **dr.occa** » Wed Oct 21, 2009 1:21 am

gda03subaru wrote:lucas assy lube.... all the way

i just use the oil i'm actually going to be running in it. fill it up with oil and hand crank it.

Chris-pee · Post by **Chris-pee** » Wed Oct 21, 2009 7:30 am

mooreofit wrote:stay away from the lithium!!!!!!!! assembly lube that is it will clog up your pickup screen and take out your motor.

Sure will, just ask Aaron!

mooreofit · Post by **mooreofit** » Wed Oct 21, 2009 7:49 am

permatex assembly lube FTMFW!!! if not use petrolium based vasaline!

gda03subaru · Post by **gda03subaru** » Wed Oct 21, 2009 5:21 pm

eitherway, i just like the way the lucas hangs around the journals

, and i always use nd30 or 40 depending on temp for break in, one of the motors i built (my dad's del slow) just hit 156,000 on my rebuild and still running strong with no oil consumption

dr.occa wrote:
gda03subaru wrote:lucas assy lube.... all the way
i just use the oil i'm actually going to be running in it. fill it up with oil and hand crank it.