1g rod 2 piston help?

[chanley talon]

Hello everyone i need some help i recently bought some 1g rods with 2g pistons off of tuners. However when installing them i found that one of the four had spun a baring and is no good!

So my question is... Is there anyone on here that might have one good 2g piston on a 1g rod?
If so P.M. or email me i'm in dire need. Thanks so much.

 

[djordan97]

you should be able to take the rod to a reputable machinest and have it resized for less than $50 bucks. on my old supra I had a problem of an eagle rod being out of round at the crank side and it cost me $15 bucks to have my machinest resize the rod

 

[chanley talon]

Well this is worn so bad that it would need welded up! It shocked me that it was worn so bad.

 

[95420A]

Wow man were you told about this when you purchased them? Thats messed up. Good luck with replacing it.

 

[chanley talon]

No i wasn't told so now i'm left in need! Is there anybody out there? That has one maybe they trashed their others or upgraded?

 

[BogusSVO]

is the piston ok? no broken ring lands?

just the bearing spun in the rod? even if it looks really bad to you, it still may be able to be saved. take it to a good machine shop with good equpment and let them have a look.
What do you have to loose? You may be able to have it fixed for about $20 bucks

 

[Mr PopUps]

is the piston ok? no broken ring lands?

just the bearing spun in the rod? even if it looks really bad to you, it still may be able to be saved. take it to a good machine shop with good equpment and let them have a look.
What do you have to loose? You may be able to have it fixed for about $20 bucks

The stock finish protects the rod from ruination, if its ever turned, the rod will fail eventually.

Dont try and fix it, youll be sorry.

I know i have some 2G pistons, but im not sure if they are on rods or not, but ill look.

Wait you have 6 or 7 bolt rods? If mine are on rods, they will be 6 bolt.

 

[BogusSVO]

The stock finish protects the rod from ruination, if its ever turned, the rod will fail eventually.

Dont try and fix it, youll be sorry.

I know i have some 2G pistons, but im not sure if they are on rods or not, but ill look.

Wait you have 6 or 7 bolt rods? If mine are on rods, they will be 6 bolt.

what finish are you talking about?

How many rods have you ever resized?

also then explain to me how aftermarket rod bolts are installed, and the housing bore is still in spec. WITHOUT resizing the rod.

 

[Mr PopUps]

what finish are you talking about?

How many rods have you ever resized?

also then explain to me how aftermarket rod bolts are installed, and the housing bore is still in spec. WITHOUT resizing the rod.

I never said you couldnt resize them i said you will ruin them. The shop i use did a lot of research to find that out, and has turned away business like that for the liability possibles.
Its the same with the crank.

Wait, you dont know about the 'coating'? Search much? http://www.dsmtuners.com/forums/bolt-tech/137911-nitrate-coating-crankshaft-how-important.html

You obviously work in a shop, but you dont know that? How many 4G63's have you built?

 

[BogusSVO]

I know about coating on cranks, and some cases the con rods.

But as far as I know, the 4G63 rod does not have such a coating. Very few mass produced/common engines would.

I have never built a 4G63 engine, for the past 13 years I have done nothing but rebuild cylinder heads for the most part. So yes I will ad mit I am a bit out of date on some the new methods being used in the short block.

 

[Mr PopUps]

I know about coating on cranks, and some cases the con rods.

But as far as I know, the 4G63 rod does not have such a coating. Very few mass produced/common engines would.

I have never built a 4G63 engine, for the past 13 years I have done nothing but rebuild cylinder heads for the most part. So yes I will ad mit I am a bit out of date on some the new methods being used in the short block.

Well the first DSM's were made in 1989...

But im glad you took what i said with some salt and thought. The 7 bolt rods are the worst of the two, but if you bite even .010 into it, itll spin the bearing fairly soon.

 

[BogusSVO]

Well the first DSM's were made in 1989...

But im glad you took what i said with some salt and thought. The 7 bolt rods are the worst of the two, but if you bite even .010 into it, itll spin the bearing fairly soon.

now whats your theory of what causes it to spin?
The only reason I can think of is the housing bore was not resized properly.

 

[Mr PopUps]

now whats your theory of what causes it to spin?
The only reason I can think of is the housing bore was not resized properly.

If i remember correctly, he said that the metal gets soft and allows the bearings to turn. Nitrite coating hardens the metal, and if thats compromised...

 

[BogusSVO]

that would be assuming that the rods are nitride coated, and that machining would cut through that.
Also there is a slight crush fit to the bearing inserts that force it against the housing bore. so I will say your soft metal theory is wrong.....

well according to the 1994 mitsu factory/dealer manual has no note about not being able to resize the rod.
I would conclude that the rod is not coated and able to be resized.
also I have a set of 4g63 rods at my feet, with the factory bearings, and they sure do not look coated, you can even feel the factory hone marks.

damn.... I must have learnd something in school.

Chanley Talon..... IMHO.... I would have no issues having the rod resized and put into service, But you may want to replace the rod bolts, they may have been heat stressed from the rod bearing spinning inside the housing bore.
I am sorry for the hi-jack of your thread.

MrPopUps... you need to go do some reaserch of your own, this is the 2nd thread you have tried to pass misinformation in.

 

[Mr PopUps]

Fine, forget reading you PM i just sent.

You want proof? Call the guy, his name is Earl at S&S Speed 859-342-4777.
Ask him if he recommends turning a DSM rod or not.

Whether or not im right, its a WARNING, not a pissing contest, take it how you will, but its NOT misinformation.

 

[donniekak]

DSM cranks are nitrided, and sometimes react poorly to turning. Some shops do it no problem other shops have problems. The rod's are not nitrided, and any time the rod bolts are changed they must be resized. I have built many mitsu engines, 6g72's and 4g63's, everytime i reuse stock rods i have them resized. The op should take the rod to a good machine shop and have them look at it. I don't like to reuse spun rods, but it may be ok. A better option would be to get another 6-bolt rod and have the piston hung on it. I would have all of them resized with arp rod bolts before i installed them.

 

[BogusSVO]

Are these the same rods your talking about in both threads?

http://www.dsmtuners.com/forums/cylinder-head-short-block/340737-spum-baring-question.html

 

[chanley talon]

Yes it is but after looking closer i realized it was worn of so deep that the edge was rounded. So it took a lot of the rod.