New forged motor question?
Well i took the truck for a drive yesterday. Everything seems to be operating fine. However it is still smoking out of the breather on the catch can. Once again I have no PCV so I'm not sure that affects anything or not. I will pull off the oil cap off tonight as recommended to see if it smokes from there.
70c10,
About the topping off of the coolant....
Pop the upper radiator hose off and fill the block/heads from there. Then pop it back onto the water pump port. Then again, top off the radiator. Then, with the radiator cap off, start it up and stand there until you see the coolant start to flow....T-stat opened.....when the level drops top it off immediately. Then stand there and wait for it to open a second time and top it off again. Do it a third time if you need to if the level keeps dropping.
Make sure you don't sit there and over heat while waiting for it to open the first time, there could be an air bubble on the engine side of the t-stat and won't ever open.
If this happens, as the engine is idling, squeeze the upper and lower radiator hoses rapidly many times each, this should move the air bubble through the t-stat and allow the hot coolant to touch it so it will open. Once it opens one time......you're good, just keep topping it off as I said above.
This is also a good time to stop using Dexcool and go GREEN coolant. I did this many years ago and my engine absolutely runs cooler all around. And it stays very clean......
.
About the topping off of the coolant....
Pop the upper radiator hose off and fill the block/heads from there. Then pop it back onto the water pump port. Then again, top off the radiator. Then, with the radiator cap off, start it up and stand there until you see the coolant start to flow....T-stat opened.....when the level drops top it off immediately. Then stand there and wait for it to open a second time and top it off again. Do it a third time if you need to if the level keeps dropping.
Make sure you don't sit there and over heat while waiting for it to open the first time, there could be an air bubble on the engine side of the t-stat and won't ever open.
If this happens, as the engine is idling, squeeze the upper and lower radiator hoses rapidly many times each, this should move the air bubble through the t-stat and allow the hot coolant to touch it so it will open. Once it opens one time......you're good, just keep topping it off as I said above.
This is also a good time to stop using Dexcool and go GREEN coolant. I did this many years ago and my engine absolutely runs cooler all around. And it stays very clean......
.
Dont worry about the breather. Rings are gapped. Just be concerned if it gets worse. Use the amount thats coming out now as a baseline. If it gets worse, investigate.
It will probably get better as they seat.
It will probably get better as they seat.
broken ringland. Not sure what exactly caused it. I might have driven it a little to hard before it was put on the dyno. Not really sure how to diagnose. My tuner said everything looked good when he did the initial tune and when is was on the dyno. I was around 8#s of boost on stock internals.
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I agree with the rings not being seated yet. My last LS build i bought some bad *** rings and they refused to seat. 8k miles and it still smoked on occasion. My buddies dad has been a mechanic for 30 years. He put ajax in a bottle with a little water and ran it through the engine obviously very little and the rings seated instantly no more smoke. Some rings are just harder to seat than others.
Take your oil fill cap off....see if any air is puffing out of it while its idling. Give it a rev too and see if that causes air to puff out. If puffs of air do puff out that usually means a broken ring.
You can also try to pull the PCV vacuum line off the intake vacuum port and cap the vacuum port off. See if that same smoke comes out of the oil filler neck with the cap off. If its stops coming out you have a bad PCV valve thats stuck open.
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You can also try to pull the PCV vacuum line off the intake vacuum port and cap the vacuum port off. See if that same smoke comes out of the oil filler neck with the cap off. If its stops coming out you have a bad PCV valve thats stuck open.
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I know people have different thoughts on new engine break-in ideas. But all of my engines were put on the dyno, allowed to warm up. Then immediately did two 80% throttle pulls....then a few WOT pulls. Thats it, rings are fully seated The rest of the engine breaks in over the next 2,000 miles. Easy driving for the first 5 miles with a new engine does it no good. I think all of the brand new GM engines that come off the line get 4-5 full WOT runs on the dyno....then they go out to the customers.
I just don't like smoke coming from the oil fill cap......or anything coming out of the cap. Nothing should be coming from there. I don't get it.
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Last edited by LS6427; Jul 6, 2017 at 05:27 AM.
TECH Junkie
Joined: Jul 2015
Posts: 3,012
Likes: 48
So I went out and filmed my car smoking out the valve cover breather. It's smoked like this even BEFORE i went through the motor last summer. There wasn't one broken ring then..... and I'm absolutely sure there's still no broken rings anywhere in this motor.
How many miles are on the engine now? How did you break it in.....on the dyno doing full hard pulls?
I know people have different thoughts on new engine break-in ideas. But all of my engines were put on the dyno, allowed to warm up. Then immediately did two 80% throttle pulls....then a few WOT pulls. Thats it, rings are fully seated The rest of the engine breaks in over the next 2,000 miles. Easy driving for the first 5 miles with a new engine does it no good. I think all of the brand new GM engines that come off the line get 4-5 full WOT runs on the dyno....then they go out to the customers.
I just don't like smoke coming from the oil fill cap......or anything coming out of the cap. Nothing should be coming from there. I don't get it.
.
I know people have different thoughts on new engine break-in ideas. But all of my engines were put on the dyno, allowed to warm up. Then immediately did two 80% throttle pulls....then a few WOT pulls. Thats it, rings are fully seated The rest of the engine breaks in over the next 2,000 miles. Easy driving for the first 5 miles with a new engine does it no good. I think all of the brand new GM engines that come off the line get 4-5 full WOT runs on the dyno....then they go out to the customers.
I just don't like smoke coming from the oil fill cap......or anything coming out of the cap. Nothing should be coming from there. I don't get it.
.
Staging Lane
Joined: Dec 2012
Posts: 91
Likes: 0
Agree with LS6427, you need to load new rings right away to properly seat them. This is especially critical with harder top rings.
It could be that your rings didn't seat perfectly, or that your ring gaps are a bit excessive, but oh well. I wouldn't worry about what you're seeing there. Wouldn't hurt to do a quick compression test to make sure everything is in check, but I'd recommend you close the hood and go give that thing the ol' sports car tune-up (drive it hard).
You could always pursue a pcv system to create a vacuum on the crankcase, which should help the rings seal better. I run a system through my exhaust which I've been very please with.
It could be that your rings didn't seat perfectly, or that your ring gaps are a bit excessive, but oh well. I wouldn't worry about what you're seeing there. Wouldn't hurt to do a quick compression test to make sure everything is in check, but I'd recommend you close the hood and go give that thing the ol' sports car tune-up (drive it hard).
You could always pursue a pcv system to create a vacuum on the crankcase, which should help the rings seal better. I run a system through my exhaust which I've been very please with.
oil pressure is good, I installed a melling HP pump. I was told a couple different thoughts on oil. Run what I'm going to be using, and some say to use special break in oil. Thoughts on this?
So I went out and filmed my car smoking out the valve cover breather. It's smoked like this even BEFORE i went through the motor last summer. There wasn't one broken ring then..... and I'm absolutely sure there's still no broken rings anywhere in this motor.
http://youtu.be/LDyTR_Gm-tY
http://youtu.be/LDyTR_Gm-tY
Pull it and sell it. ; )
I don't believe special break in oil is needed for these engines since the cam utilizes roller lifters.
It's been so long since I built a new engine lol.