I've been reading up on different cams i'm interested in, And the JUN stage 3's seem to be a very good choice. The one BAD thing I've heard is that they tend to break on the cam gear side. Why does this happen ? And has JUN done anything to correct the problem ?
I have also read many threads on people that say they've never had a problem and absolutly love them.

 

Installer Error.

 

2 known reasons.

JUN valve springs need to be installed at a certain height (i dont know what it is off the top of my head) if not installed at that height, they have been known to bind at high lift, and when the valve spring binds, for some reason it causes the cam to break.

Also dont over torque the cam gear bolt..that causes it to break as well.

I speak from experience..refrain from asking.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 98itR484 &raquo;</TD></TR><TR><TD CLASS="quote">2 known reasons.

Also dont over torque the cam gear bolt..that causes it to break as well.

</TD></TR></TABLE>

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 98itR484 &raquo;</TD></TR><TR><TD CLASS="quote">2 known reasons.

JUN valve springs need to be installed at a certain height (i dont know what it is off the top of my head) if not installed at that height, they have been known to bind at high lift, and when the valve spring binds, for some reason it causes the cam to break.

Also dont over torque the cam gear bolt..that causes it to break as well.

I speak from experience..refrain from asking. </TD></TR></TABLE>
can you explain what you mean when you say they need to be installed at a certain height ? thanks

 

......................and don't have the timing belt too tight

 

Jun valve springs are close to coil bind with JUN 3 cams. If install height is off it will only magnify this problem.

I never knew about the too tight timing belt. My belt is cranked down with my JUN 3 cams.

 

Personally, I think that Jun had a bad batch of cams. There was a rash of broken Jun 3's a couple of years back. Not heard about any Jun cams breaking lately.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by b19coupe &raquo;</TD></TR><TR><TD CLASS="quote">Personally, I think that Jun had a bad batch of cams. There was a rash of broken Jun 3's a couple of years back. Not heard about any Jun cams breaking lately.</TD></TR></TABLE>

mine did...but it was about a year ago, after all the horror stories.