2G HELP!!!! Scat wrist pins

[96gst_4life]

so i got my scat rods and the top line pistons. i was fidelling around with them and found that i can put the wrist pins in by hand.... i know that you have to get them pressed in.... wtf is going on here...

 

[ZmanIV]

i know that you have to get them pressed in.... wtf is going on here...

Are you sure?

 

[dieseltech]

What can you put them in by hand? The pistons or the rods? If you can in the rods and pistons then you have a floating wristpin setup, or the wrong wristpins. If you can in the piston but not in the rod then you have press fit wristpins. Clear as mud?

 

[96gst_4life]

well the wrist pins just sliped in i mean there is no play in them or anything and i dont have to wris pin clips in eather the top lines dont come with them so??? do i use my old ones? i mean the top line pistons are nothing fancy just a stock repalacement..

 

[alex1090]

Do the rods have a brass insert?? Do the pistons have a groove for a clip??

 

[96gst_4life]

here i put up some pics

http://www.dsmtuners.com/gallery/browseimages.php?c=503

 

[stealth mullet]

looks like you have a 22mm piston bore hole and a 21mm wrist pin.

 

[ZmanIV]

wow you are good I cant tell squat from those pics

 

[96gst_4life]

how can that be. its a top line set how could they screw that up? when i opened the package everything was all neat. i guess i just need call extremePSI and see what they have to say..

 

[laserspeeddemon]

Topline pistons have a tendency to break the ring landings. I don't know from personal experience, but quite of few other DSMers have had this problem.

 

[96gst_4life]

but is it posible that they can send you the wrong wrist pins? or just have the wrong wrist pins in the wrong box? has anyone installed top line pistons befor?

 

[DoyoFCT]

i think if your going to be using Scat rods, you may as well pickup a decent set of pistons. I've heard good opinions of ITM pistons compared to the topline, but i would doublecheck and make sure you have the correct rods/pistons/pins etc

my vote is buy a set of mahle's or wiseco's, or ross.. and be done with it, but do check to make sure you have the correct rods whichever direction you go.

 

[SlowSpyder]

Scat rods are bushed and set up for a floating wrist pin. You will either need to go to a different piston that comes with wrist pin locks or machine the existing pistons to accept wrist pin locks. On a stock rod the wrist pin is held in place via press fit so no need for pin locks, now if the pin now floats in the rod then there must be locks on the piston to stop the side to side movement of the pin. Hope this helps!!

 

[stealth mullet]

Scat rods are bushed and set up for a floating wrist pin. You will either need to go to a different piston that comes with wrist pin locks or machine the existing pistons to accept wrist pin locks. On a stock rod the wrist pin is held in place via press fit so no need for pin locks, now if the pin now floats in the rod then there must be locks on the piston to stop the side to side movement of the pin. Hope this helps!!

^ what he said.

btw...i make pistons for a living.

 

[96gst_4life]

the pistons look like they accept the wrist pin locks. the kit just didnt come with them..so ill just have to pick up a set.

 

[stealth mullet]

the pistons look like they accept the wrist pin locks. the kit just didnt come with them..so ill just have to pick up a set.

i dont see a removal slot for the lock ring. find out what the diameter of the wrist pin is, and the diameter of the piston bore hole. if it takes a lock ring, the clearance should be somewhere around 0.0008-0.0010". if the piston we a full round bottom, and didnt have a lock ring and had a floating pin, it should have "buttons" to keep the pin in place. but from those pics i cannot tell if there is a lock ring cut. can you take any pics with a higher resolution?

 

[meliketoball]

I remember in class, my friends tried to press fit the connecting rod to the piston..needless to say it was their first time doing so and press fitted it crooked 3/4's way they lodged the wrist pin out of the piston side and snapped a huge chunk off it. teeheets, it was pretty funny because all the parts were new.

 

[1sick91tsi]

If there scat rods, i believe there same thing as eagles. Eagles are floating pin design, which means you dont press the pins in they float and the pin is held in from the retaining clipps on the piston. The pin being able to be just pushed into the piston is normal, as long as those top line pistons come with retaining clips, and groves in the outer edge of the piston pin bore everything is fine. If they dont then you need different pisons because there set up for a pressed pin design.

 

[alex1090]

You can defenitly see the color of the bushing in the picture.