Just a question out there for anyone. Heres the situation. Just got a forged bottom end rebuilt for me. Got it back into the truck today. Took it out to break it in a lil bit. Went into some boost, apparently it helps seat the rings this way by driving it hard?

During the run, heard a noise from the rear (STS turbo). Thought it was something turbo related. Went to pop the hood, and the dip stick was popped up again. Same thing that happened before my rebuilt, broke some of the piston rings.

Are the rings not sealing if i'm getting blow by again? Could it be something else?

Please help me!

 

It takes a while to seat the rings. I would say 1000 before it is good to go. I would not take it above 3k unless you are just holding a gear and u are not flooring it. Just for ***** and gigles what are your ring gaps?

 

Do you have any way of relieving crank case pressure? I read in the FI forum that boosted applications that dont have a means of relieving crank case pressure can pop the dipstick out. Also, running the engine hard is a great way to break it in. My new GTO has about 500 miles on it now, and i only recently started driving it "easy". Easy is a relative term here, i'm still giving that engine hell. I'll find out if it pays off when i dyno in January.

 

Never have I EVER heard that running an engine hard is good to "seat the rings", or that giving it hell "pays off". No offense, but I feel sorry for the the person that buys your car if you decide to sell it. Ever heard of breaking it in easy makes an engine run stronger longer? The rings need time to seat, and that is done best at lower rpms and not high loads being put on the engine. I could go on and on about the way to "properly" break in an engine, but some people will still think the "break it in the way your gonna drive it" theory is the way to go. Don't mean to step on any toes, but that's my say. Good luck.

 

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

What do you think?

 

I've heard its not good to totally baby it but to put a good load on it...not necessarily high rpms though.

 

I believe in running it hard, but with boost I would try to say out of any real boost until you have a few miles on it. That is what I did on my new bottom end and I have had no problems to date. On another subject you could have hurt it again especially if the tune is off. A forged bottom end is a lot stronger than the stock, but they can be damaged in the same way as the stocker usually takes more though. make sure you aren't running lean while under boost. It will kill it faster than you realize.I would think you would have some blow by but not enough to blow the dipstick out? might want to do a leak down or a compresion check hear pretty soon if your problem continues. It will tell you what, where and how bad. Good luck!

 

I've built many motors in my life & hang around with a few guys that've owned machine shop's & raced for more years than I've been alive. One of the things we all like to do when breaking in a engine is for the startup run the cheapest non detergent no additive motor oil you can find for the first 20 miles, kind of taking it easy on the motor. Then we will swap to another batch of cheap oil for another 20-50 miles. You don't need to change oil filters for this process. After that, just put whatever oil you want in it & beat the hell outta it. Using this process we get a good ring seat by the end of the second cheap *** oil change & a couple of heat cycles.

With a turbo, you might want to look into some valve cover breathers to relieve any pressure caused by blow by under boost to prevent the dipstick from popping out.

 

good news guys!!

The rings are seating now. No more blow by. The guy who said "break it in like you'd drive it" obviously wasn't talking about FI setups. I started putting boost to it at like 30kms on the new engine. Not a great idea.

I'm at 150kms now and putting some boost into it, and no more blow by.


My problem is now.... the T60 turbo on my STS kit seems to be "shutting down" after a little bit of harder use...?!?! I don't know whats going on!!!?! Is there any safety mechanisms on the turbo to stop it from producing boost if it gets too hot?
I went to check all the hoses and piping, seems all good. but it sounds like it spool, but offer no power and never gets above atmospheric. Then, i'll shut it down for a couple of hours, and i'll have full wastegate pressure (5psi) The T60's got a 0.84 AR i think right now. It's probably choking it out, but would that "shut down" the turbo after a while?

Thinking of probably going with a GT67.... and hopefully it will solve this problem??? Any insight?

 

To shut down boost like that it can mean your A/F is way too lean.Are you scanning the truck?I've personally seen a truck go to 0.00 on the 02's under boost when the injector's just shut down.Just make sure that isn't happening.

 

That is some good new for you . Glad to hear it.