Dealer emailed me at 730 tonight and told me my L was in I'll be picking it up tomorrow. Needless to say I can't sleep for some reason. So who's up with me?

I have a bit of a problem. As my name suggests (VTSVT) I go to Virginia Tech, but I ordered my truck back home in Northern VA 260 miles away. What should I do about taking my truck back with me? As I understand it, highway driving for that length of time isn't the best way to break it in. I'll have about a day to drive it here locally before I have to go back. What’s the best thing for me to do?

 

Congrats. You are right constant speeds for prolong periods of time isn't good for the break in of a motor. Could you travel highways and back roads? That would keep you off of the Interstate and out of the constant speed syndrome.

So what color did you order?

 

ewww not sure about the back roads. Got some snow here tonight. I drove through it on the way home tonight and it was covering the interstates, so I'm not to confident about the back roads but thats a good idea thanks.

And as far as color goes, I would only order the best.....Black

 

varrying speeds for break in does not apply to our modular motors.

 

Congrats on new truck!!! Varyring the speed could'nt hurt it either though j15big Just run the truck between 55-75 depending on road conditions just my 2 cents.....

 

I don't understand why. Whats the difference in the piston rings and cylinder walls in a modular motor vs. a pushrod motor?

 

if you can vary speeds go ahead just to be safe. but if its too much trouble or you forget, dont worry.

 

I dont know exactly why but the rason for varrying speeds in old pushrods was to break in the valvetrain[cam, pushrods, lifters, etc..]. Our modular motors have a totally different valve train and do not require the same breaking in procedure. a nice, long, easy drive[regardless of rpm] is a good break in for the rings.

 

just so you dont misunderstand. you still have to go easy on the motor. dont run it up to 5200 rpm with 10 miles on the clock.

 

How far off the mark am I here?
When I changed the cam in my GN I had to break in the new cam and lifters by running the motor for 20 minutes @ 2000rpm (comp cams). It was critical to the break in of the cam that the rpms DID NOT VARY and that it completed the entire 20 minute run. This seems opposite of what you stated for breaking in a pushrod valve train. I could be wrong (its happened once before).

I thought the purpose of varying speeds was to insure good piston ring to cylinder wall break in at all rpms. Which to me seems not to matter if the motor is pushrod or OHC.

Now here is where I'm going to say something that I'm not entirely sure about but just seems to make sense to me. Varying the speeds during the break in periods of pushrod motors is recommended because the cam and valve train has had an ample break in at some point before the vehicle was shipped to the dealer. I could be wrong here again but it would be the first time I was wrong twice in one post.

 

you are beyond me.....
i got my info from sal when i first got my truck back. maybe he will chim in and explain....

 

Yes. Lets hear what The Great Salvathor The Greek God of Modular and Pushrod Motors has to say about this. I'm interested in knowing.

 

Check out this thread. It was posted by Soap a while back.It talks about break in.


https://www.f150online.com/forums/sh...hreadid=100062



VINNIE

 

Vinnie's up at 4 AM? or he hasn't gone to bed yet!

Anyway Congrats on your new truck...Wooooo Hoooo

Just get on the interstate and drive it home. Stay off the back roads with this snow stuff. I wouldn't go over 65 though.
Hey, did I say congrats

 

Welcome to the club, VT !!! I think just normal variation for
a day is gonna be ok. And no cruise control on the trip home.
Drop it from 65 to 40 and back every so often.

Jest my $.02 ...