[Mud'N'Truck]

I finaly got my motor all together and in the truck. Will be starting it real soon and i was just woundering the proper way to break it in. How many miles? What do i run it at the first 15min, etc.

It is a pretty built up 350.

 

[Smiley23]

Strangler gave you a pretty good answer in this post - the most important part is the startup.

http://www.greatlakes4x4.com/showthread.php?t=54677

Take it a few miles and change the oil - depending on what work was done and how well they cleaned the block.

 

[Mud'N'Truck]

Yea i know. Just looking for more, even though i dont really need it. Was just curious if there was somthing else to it.

 

[Haggar]

Heh, once you've broken in the cam, then find a flat long road. Do several wide open throttle runs up to ~60 mph, with hard engine braking after each run. Then change the oil and enjoy.

 

[Pokerob]

drive it under 55 for the first 500 miles with varying speeds : ) seat those rings.

 

[Ebs]

...like you stole it.

 

[Christmas Cookie]

Wide open...I broke in all my race bikes like this and they worked great! Read this: http://www.mototuneusa.com/break_in_secrets.htm

 

[BigBlkYJ 355]

Cam break in is usually around 15-20 minutes at around 2500 rpm. If thats what u were asking in the first post. Keep an eye on engine temp tho, u dont want to burn it up or run it too lean during that.

 

[Mud'N'Truck]

For cam break in do i have to run all 20min's at once or can i stop at 10 and then do another 10 after it cools back down.

Very interesting web page there on breaking in a motor. Made me think about.

 

[BigBlkYJ 355]

no ur really suppose to run for 15-20 for the initial break in, so im told by a buddy who is a major small block guy. I guess run as long as possible before u see that damage might occur from heat. Might want to run an old school mechanical gauge setup for the temp, for break in.

 

[Mud'N'Truck]

I did end up putting a mechanical gauge in also cuz i wasnt sure if the stock gauge was goin to work.

Ill get some house fans and put those out front for a little extra insurance.

 

[boggin-machine]

if you put fans in front of it wouldnt that defeted the purpose of the fan on the motor once its in the truck and driving.... or in the mud wheeling... let it break its self in at the normaly temp as if you stuck in mud and dont get the flow you need there.... there warmer the motor is during break in the better... just as said above.. dont let it get to the point damage will occur... mine runs at about 200 210 range in a blazer.... with a smal block fuel inected k5 blazer

 

[Mud'N'Truck]

The fans are just back up in case it does want to get up high.

 

[boggin-machine]

gotcha... is just let it run where it wants to run on its own to see if there actually is a problem where the system wasnt bleed all the way or the coolant level isnt right... what coolant ratio did you end up going wiht???

 

[Christmas Cookie]

I'm telling you run it hard...you won't be sorry...none of this heat cycle crap or anything...same thing when you buy a race engine, those guys run it on a dyno harder than you would for the life of an engine....just remember bring to operating temp before you give it the hammer

 

[Mud'N'Truck]

I think that once the cam is broken in ill run it hard. And yes i do know to let it warm up first.

Fish boy, it is just premixed 50/50. Still have to get more though. Takes like 4 gallons i think. Put 3 in and its not every close to full.