Je piston/wrist pin clearance

gachax

New Member
Oct 16, 2007
29
0
1
Latvia
I've got new JE pistons with JE wrist pins. The thing is pins seem to be too loose. If pushed in (and turned so the pin hole points to the ground), they slide out without a help. If pushed in only in one side of the piston wall it's possible to feel a very little play. Eagle rod "holds" the pin much more tightly.
Everything was ordered as a kit.
I did a bit of a research:
Standard pin diameter: 0.8660-0.8665 " (http://www.cygnusx1.net/Supra/Library/TSRM/MK3/manual.aspx?S=EM&P=80)
According to JE wrist pin part number breakdown (http://64.233.183.104/search?q=cach...ins&hl=sv&ct=clnk&cd=4&gl=se&client=firefox-a)
and JE wrist pin list (http://www.flatlanderracing.com/jepistonpins51.html) I've got correct size pins (0.866").
I couldn't find the size of the JE wrist pin hole, so I don't know if clearance is correct (I don't think next available size pin (according to JE pin list - 0.875) would fit, though).
TSRM says you should be able to insert the pin only at 140 F temp., but that of course is for OEM pistons.
So, the question is, is it possible I've got the wrong size wrist pins?
 

nosman4

Member
Nov 10, 2007
133
0
16
Bend, Oregon
I believe you have the right size pin, I would be worried more about if the Eagle rod is holding the pin too tightly. There are clips that hold the pin into the JE piston, this piston design is not a press or heated fit like the stock ones. As long as you can rotate the pin and slide it in and out of the rod without much resistance you should be fine.
 

gachax

New Member
Oct 16, 2007
29
0
1
Latvia
nosman4;1176285 said:
I believe you have the right size pin, I would be worried more about if the Eagle rod is holding the pin too tightly. There are clips that hold the pin into the JE piston, this piston design is not a press or heated fit like the stock ones. As long as you can rotate the pin and slide it in and out of the rod without much resistance you should be fine.

Ok, thanks, nosman4 :)