texas97z

Wanted to get thoughts on break in period.Had to replace crank so replaced bearings on rods and mains. Wanting to know how long I should take it easy on this thing before finally going to track and beating on it? This is my daily driver, I want to be sure.

Thanks for the advise.

dangalla

i started mine let it run to heat up and then shut it down to let cool down in the shop. then just drove it. changed the oil at 200 miles and then again at 3k. i would not baby it either but that just my opinion

texas97z

Did you run it at full throttle at all during the 200 mi period, or just casual driving. Reason I am asking is some friends are wanting to go to track next weekend and I really want to drive it, but not if something might break due to running it too hard to soon. I have never just changed bearings before, always complete rebuild, so no experience to go off of.

dangalla

everyone has a different opinion on this, but i would just cruise it around until the first oil change at 200. and i would beat it up a little after that but before the track just to make sure nothing goes wrong

Zeetwentyfate

i always heard to let it hot run at 2k for 30 minutes, change the oil. then drive it for 500 miles then change the oil again. drive it like your gonna drive it then change the oil at 1k after rebuild. then drive it like any other

texas97z

Ok, thanks for the advise to both. Looks like I will be playing it safe and no track for three weeks since I only drive 16mi a day to and from work. I will change to oil after a couple hundred as suggested and check it out. Then maybe finally get some track time. I am just excited because although I have been beating up on cars, it has been 8 years since I have driven at a track and there is an 1/8 mile about 20min north of our house. Ever since the rebuild I have been wanting to go, and everytime have had to wait cause something else broke, or it would rain. But I suppose smarter to play it safe.

Thanks agian to you both.

dangalla

thats more for a non roller camshaft

95Blackhawk

Screw that! Just get out there! Don't baby the damn thing!

I was on the track after 100 miles and only waited that long so I could get on the dyno first to make sure my tune was correct.

Projectz28

there is no "break in" for a bearing. They should not be touching anything anyway. If you measured right and all is well, put them in and dont look back.

Zeetwentyfate

thast right all the breakin is for is to seat the rings right?

texas97z

ok then I won't worry. Like I said, needed guidance as I have never done just crank bearings. Nothing is rubing and it drives fine so I won't worry about it. Thanks again.

marshall93z

Kick it!

Josh'95Z28conv

No break in for bearings, only rings.

Run it!

1badasZ

donno for sure but seems if its together right you should be ok. you dont see all out race cars goin up and down the highway breaking in lol...i would guess you should be ok

SS RRR

just to add, if anyone tries to argue how you read some article how a camshaft should be "broken in" and misconstrue that the cam bearings need to then be broken in, it does not pertain to a roller valve train. That only applies to traditional SBC's with non-roller lifters seating to the cam lobes.