Is there any bad things that moly rings can do to forced induction motors? When i dropped my pistons off at my machine shop they said moly rings are no good for boost/supercharged motors.

CP Pistons and the rings that came with them.

Any input?

Also, the reason im posting this ie because the machine shop that built my motor things that the moly wore off the rings and contaminated my oil causing the rod knock. Here is a picture of the bearings:




Modified by OMG B16 at 6:05 PM 7/10/2007

 

Thats weird ive never heard of that before

 

bullshit. The rings and the moly "face" on them had nothing to do with bearing damage. They look like they got hot, and besides most moly seperates from oil anyways

 

in for feedback...

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Runnerdown &raquo;</TD></TR><TR><TD CLASS="quote">They look like they got hot:</TD></TR></TABLE>

Yeah that's generally what happens when you get rod knock.

 

acl bearings?

 

CP pistons CPN rings that come with all their import piston sets are a gas nitrided steel ring...best rings in the business

Your bearings show contamination in your oil. I do not see a spun bearing and from how they look, there should not have been a knock from those bearings. Maybe your pin bushings are getting tired?

 

Looks like lack of oiling . Judging by how the coating has broken down on the bearing surface

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by ninesecrx &raquo;</TD></TR><TR><TD CLASS="quote">CP pistons CPN rings that come with all their import piston sets are a gas nitrided steel ring...best rings in the business

Your bearings show contamination in your oil. I do not see a spun bearing and from how they look, there should not have been a knock from those bearings. Maybe your pin bushings are getting tired?</TD></TR></TABLE>
This is what i was looking for. What could contaminate the oil enough for this? Fuel? Anything else? The car was running semi-rich. An oil change was done 2-300 miles before this happened. There was a total of 2000 miles on the motor(Brand new GE HD Sleeves, Brand new Eagle Rods, Brand new ACL Bearings, Brand new CP Pistons.) How do the pin bushings wear/get tired?

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Jared &raquo;</TD></TR><TR><TD CLASS="quote">acl bearings?</TD></TR></TABLE>
Yes.

 

What weight oil? Also does the shop have a blueprint of the rod bearing clearances?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Muckman &raquo;</TD></TR><TR><TD CLASS="quote">What weight oil? Also does the shop have a blueprint of the rod bearing clearances?</TD></TR></TABLE>
.0017, .0016, .0017, .0019. I was running 15w40

 

bump for answers

 

Semi- rich on a new motor huh? That might be the cause of your failure. You probably washed your cylinder walls out and contaminated your oil, what does your piston skirts look like?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Lonnie &raquo;</TD></TR><TR><TD CLASS="quote">Semi- rich on a new motor huh? That might be the cause of your failure. You probably washed your cylinder walls out and contaminated your oil, what does your piston skirts look like?</TD></TR></TABLE>
We only had the rich problems when we put the fuel pump and injectors in and tunned it for boost. I broke in the motor on stock fuel pump and some prelude injectors for 1500 miles. I should have the motot apart this weekend and have pictures of everything.

 

prelude injectors and a stock pump with what tune? stock tune?

what motor is this btw, I asume by your name it is a b series?

 

tell your shop that molybdate is a chemical lubricant.

I other words it is a natural lubricant that actually can get down to the molecular level and lubricate. Many transmissions and parts are coated in this stuff for initial startup.

There is no way moly coated piston rings could cause this, unless they shattered and ended up in specs so tiny that they got sucked up into the pump, pass through the passages in the crank and spewed out into the bearings. How do the mains look?

BS like this would cause me to question other things. Hopefully your blueprint is actual figures, not just put in there to cover their rear. Check the clearances yourself too Just to make sure.

 

Moly rings are inappropriate for boosted engines, and will lead to blowby.

I doubt the moly coating would in any way, shape, or form cause bearing damage. As Lonnie said, semi-rich could be your ring problem. Good hard rings meant for a turbo build take a little longer to seat and that gives you more time to expletive things up if you didn't attend to the tune.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by twkdCD595 &raquo;</TD></TR><TR><TD CLASS="quote">prelude injectors and a stock pump with what tune? stock tune?

what motor is this btw, I asume by your name it is a b series?</TD></TR></TABLE>
The car was tunned from start-up on crome by Turbogixxer. It is a LsVTEC.

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by blaze the chemi &raquo;</TD></TR><TR><TD CLASS="quote">tell your shop that molybdate is a chemical lubricant.

I other words it is a natural lubricant that actually can get down to the molecular level and lubricate. Many transmissions and parts are coated in this stuff for initial startup.

There is no way moly coated piston rings could cause this, unless they shattered and ended up in specs so tiny that they got sucked up into the pump, pass through the passages in the crank and spewed out into the bearings. How do the mains look?

BS like this would cause me to question other things. Hopefully your blueprint is actual figures, not just put in there to cover their rear. Check the clearances yourself too Just to make sure. </TD></TR></TABLE>
Well, its my dads machine shop, he knows the builder very well. They have been friends for over 10 years. I doubt he would lie about the clearances.

 

Did the machine shop check the rods for roundness? I got some Eagle Rods and as soon as I gave the to my machine shop to be put on my Mahle pistons he said, "Those Eagle rods are out-of-round." And sure enough they were. Going to use some Carrillo rods.

 

Well, it wasnt the rod bearings knocking like some of you have said. Here are the damage pics.


High Res:
http://img509.imageshack.us/im...0.jpg
More coming soon.

 

More pics:

 

wow man, im gonna be so pissed if my **** ***** up like this. it seems to me honda is junk once you goto rebuild them, im seeing more people EVERYDAY with only 1000k miles, and **** spinnin bearings and other things...dammm, im scarred as expletive now.......does look like you ran rich as expletive....arent those brand new pistons? already carbon on them, and piston skirt is fuuckked up like fuel washed those walls bad....wow, im scarred...lol...do you have to run these bitches lean as expletive or somthing on a fresh build???

 

What's was the piston to wall clearance? You didn't run lean at all?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by DecentCivicZ6 &raquo;</TD></TR><TR><TD CLASS="quote">wow man, im gonna be so pissed if my **** ***** up like this. it seems to me honda is junk once you goto rebuild them, im seeing more people EVERYDAY with only 1000k miles, and **** spinnin bearings and other things...dammm, im scarred as expletive now.......does look like you ran rich as expletive....arent those brand new pistons? already carbon on them, and piston skirt is fuuckked up like fuel washed those walls bad....wow, im scarred...lol...do you have to run these bitches lean as expletive or somthing on a fresh build???</TD></TR></TABLE>

If its built right there is nothing to worry about. Most of these threads containing carnage as such is because something went wrong. If you don't know how to do something then leave it to the experts. Thats a pretty stupid comment "honda is junk when you have to rebuild them"? Honda is junk when they are rebuilt by idiots.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by BodyKits NW &raquo;</TD></TR><TR><TD CLASS="quote">What's was the piston to wall clearance? You didn't run lean at all? </TD></TR></TABLE>
.005" Car did NOT run lean. Im not mad at the fact this happened, its the fact that we DONT KNOW exactly what happened that pisses me off.
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by SD_Lurker &raquo;</TD></TR><TR><TD CLASS="quote">

If its built right there is nothing to worry about. Most of these threads containing carnage as such is because something went wrong. If you don't know how to do something then leave it to the experts. Thats a pretty stupid comment "honda is junk when you have to rebuild them"? Honda is junk when they are rebuilt by idiots. </TD></TR></TABLE>
I agree with you. This motor was built by a professional, tunned by a professional, and everything was done the right way. We dont know whats going on.