Pistons & Rod combo or piston's
 

Hey Style,

Im in need of some new or used pistons in good condition with fresh rings or no rings does not matter. I am looking for stock compression numbers. I have a Stock 6Bolt 4G63T That has been bored out to .20 which directly reflects on the piston diameter im in need of. Please let me know what you have. If you dont have a set but know of a good place to perhaps purchase some other then the dealer or expensive after market set's please feel free to share. I am in need of just one or a set just to get the vehicle moving again.

Thank you,

Re: Pistons & Rod combo or piston's
 

Realistically, you should bore your block out to MATCH the pistons you are using...if this is what you are doing to bore to .040 then there is a set of wiseco pistons and eagle rods for 250.00 for sale by twitch in the for sale section.

Re: Pistons & Rod combo or piston's
 

I dont think i quite understand your point? Why cant i just replace the unit in my bore with a replica bore size with no damage to my block? Is a Bottle hone before install to rough up the surface not good enough? Is that what you are referring to?

Re: Pistons & Rod combo or piston's
 

I have a stock set of big rods and pistons I was going to build a stock motor but well I said F it.

$50 and they are yours.

Re: Pistons & Rod combo or piston's
 

What about the size aaron?

Re: Pistons & Rod combo or piston's
 

oh you need .020 over?

I think they are just regular old stockers. You can try them out and let me know if they work.

Re: Pistons & Rod combo or piston's
 

You could just run .20 over rings. I do this all the time on my sleds. I know it sounds crazy and dumb but a lot of people do it.

Re: Pistons & Rod combo or piston's
 

Those are sold...

Re: Pistons & Rod combo or piston's
 

That sounds retarded... I've never heard of anyone doing this on a 4g63, piston slap would be ridiculous!

Alpha, I have 3 that are in very good shape, pretty sure they are like an "OE" replacement but are .020 over. If they could be of any use to you to make a good set out of the originals. Let me know. They were in a block that a valve came loose in one of the cylinders and trashed one piston. They are on 6 bolt big rods. I can get pictures tomorrow night or monday.

Re: Pistons & Rod combo or piston's
 

I've got a set of new OEM .020" over 1G pistons and rings mounted on 6-bolt rods. A set of rod bearings away from dropping in. $100 cash firm.

Re: Pistons & Rod combo or piston's
 

Yeah no offense or disrespect, but thats all sorts of Ghetto...that would be a sure shot gamble you dont want to take. Not saying it wont work might just be a little to far from my goal.

As far as the 3 pistons go, let me check with goat blower i like the fact he has a complete set you know that are ready to drop in since i have a set of bearings. If for what ever reason they dont work ill be coming to see you :)!

Re: Pistons & Rod combo or piston's
 

Steve you will be receiving an incoming Text within the next few hours. Thank you guys for all the quick responses!

Re: Pistons & Rod combo or piston's
 

I was pulling your chain. Haha. Make sure you check your bore size before buying anything.

Re: Pistons & Rod combo or piston's
 

-.- what do you think this is MNHONDA's! Jk lol

Re: Pistons & Rod combo or piston's
 

ive got a set of 1g big rods with 2g pistons and new rings in box. pm me if you want them. i have pics on my for sale add or i can text them.

the reason you want pistons b4 you bore is each piston may have a variance. so 20 over what? stock bore or where it was or to a .20 over piston. you may end up with a .20 over piston that has hugr piston to wall because not all things are perfect.

Re: Pistons & Rod combo or piston's
 

He bought the motor from me, they were new OE re placement .020 over pistons. We did the bore/hone at my work. I think we set ptw to .0025"-.003".

Re: Pistons & Rod combo or piston's
 

there ya go. lucky you have someone to give you that answer. again if you have the money 1g big rods 2g npr pistons new arp bolts new rings..

Re: Pistons & Rod combo or piston's
 

I can't quite understand what you're getting at here, but .020" over means beyond the stock bore, on these engines, and every other one I've ever heard of. If you want to get technical, "import" motors such as these go by mm instead of inches, so it's actually .50 mm over. Same thing though.

Every time I've had machine work done, my machinist measures all four pistons, takes the largest one, and adds the appropriate PtW clearance for all four holes based on that. PtW clearance is based on the piston material, or manufacturers specs for aftermarket, and I used to go even a little looser than that back in the day. Boring each hole to exactly the same PtW clearance for each individual piston is way overkill.

Trust me, the machine work we have done for these is generally better than what the factory ever did, and those engines lasted 150-200k miles and have withstood 500+ horsepower. Having a couple ten thousandths variance in PtW clearance is the last thing I'd worry about in a rebuild.

Re: Pistons & Rod combo or piston's
 

ok but what if its too tight? ptw is deff important when doing a build. to loose it will slap and wear early and too tight boom with the right amount of heat and stress. Not saying i'm a no it all just saying no way are all pistons the exact same was all and I feel that ptw should reflect the power/boost you plan on putting down. Maybe i'm completely wrong but i will scrutinize my ptw on my builds.

Re: Pistons & Rod combo or piston's
 

As I mentioned above, measure the largest piston, bore off of that measurement, the others can only be looser.

Stock pistons don't expand much at all, so being tight isn't much of a concern. Back in the day, JE pistons had a reputation for growing quite a bit because of the material they used, and PtW needed to be really loose to compensate. Needless to say, there was audible piston slap when they were cold.

Re: Pistons & Rod combo or piston's
 

My mistake i should have clarified that the .20 over was meant to imply .20 over stock engine bore size. As far as Piston to wall clearance if im not mistaken forged pistons are most likely slightly harder to machine together then?...meaning bore to piston... just because of the expansion rate of the metals? or does a machinest know all of those specs when going to machine the block?

Either way at the moment this is a purchase thread not a Tech thread :D I will be picking up Goatblowers set within the next upcoming days, and some plasti gauge for bearing clearances on less somebody has a better idea of how to measure clearances.

This might be a noob question as well as the wrong place to post this, however Honda engines have i believe 3 different standardized bearing sizes for both main and rod bearings. Example if one bearing has to tight or to loose of a clearance you have one other option without machining or replacing the rod or crank or cap, now does Mitsubishi do a similar thing? I have Fresh ACL 5 layer bearings i believe it was from my first rebuild i got an order of two bearing set for some reason and was just curious as to how that works?

Last but not least, Honda also orientates its piston rings a specific way in order to maximize combustion chamber sealing. Again are our pistons required to have the rings clocked a specific way? I have not done the research on positioning of rings yet but will be doing it before installing them. Quick answers are appreciated like usually :)!

By the way in case you wonder why so many honda references (Because i went though the honda pact tech program at dunwoody and well the primary engines we rebuild were honda's yay loss for me :D)

Re: Pistons & Rod combo or piston's
 

Best engine ever purchased! Solid Sucker...its a shame i damaged it by making a careless mistake. Either way thanks for chimming in John, and well be in touch soon!

Re: Pistons & Rod combo or piston's
 

Exact position of the ring gap shouldn't matter, though you shouldn't line up the gaps together for top/bottom ring. From what I've read, they actually rotate while in use so the starting position of the gap doesn't matter all that much.

Re: Pistons & Rod combo or piston's
 

Back in the day...?

My Je pistons are slap happy when cold. My ptw is right around .004. They quiet down when they get warm.

Re: Pistons & Rod combo or piston's
 

Ha, I thought they might have changed that by now. That was the reason I've been using Wiseco's all these years. JE was the piston of choice for the Buschur motors back around 2001.

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I can explain all this stuff when you pick up the stuff. But yeah, IIRC, the 95-97 motors used different sized bearings based on the stampings on the block, I remember Rick Shindley rebuilding crankwalked 2G motors and showing me this, I've only built 6-bolt and EVO motors.

Re: Pistons & Rod combo or piston's
 

best way to measure would be a dial bore guage and a good set of calipers and then plastigauge for a final test.

for anything u need to know on dsm check out jafromobile on youtube. everything else is a quik search.

for 7bolts i bealieve it is 1g, reg thrust, and split thrust

Re: Pistons & Rod combo or piston's
 

goatblower the point i was trying to make was if he had a ptw of 6 already because of pistin size diff. oh well

Re: Pistons & Rod combo or piston's
 

Sounds good blower, and i agree as far as the ring rotation...never looked into if they are capable of rotating a complete 360 degrees....and i figured the bore and caliper gauge would be the only way to go measuring the rod with its cap on when you pull it and then measure the crank journal do some math and go from there. I think itll be tricky doing it with the crank in place, but hey whats the worst that can happen I SEIZE MY ENGINE YAY!

Thanks for all the input guys, I really appreciate it and hope to have the car running again this weekend!