I'm not talking about GC or skunk2, but the JDM coilovers like Zeal, Mugen, Spoon, etc etc.... Or the only way is to buy a new set? The perches on one of my KYB race coilovers (not available in the US) is seized so bad that I almost damaged the shock body by clamping it down too hard. I tried contacting KYB USA and they can't help....

Has anyone ever tried mix and match spring perches with threaded shocks from different brands? Does anyone know if the spring perches from different brands are interchangeable (cuz some of them *look* exactly the same)?

Thanks in advance for any input!

 

If the threads are damaged, the shock will probably need to be replaced.

 

BFH won't work??

 

Wow, that stinks having to replace the whole shock.

Not to mess up your topic Wai, but how about in the case of GC sleeves and perches, can those be replaced? And if so, at what cost?

 

Use PB Blaster and let it soak for a good bit. Also, make sure that you blast out any little rocks and crap that have stuck in the perch against the threads.

You're using a spanner wrench, right?

Warren

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Reid &raquo;</TD></TR><TR><TD CLASS="quote">If the threads are damaged, the shock will probably need to be replaced.</TD></TR></TABLE>
The threads are ok cuz I held the shock down with a pipe wrench at the bottom where there's no threads. Just the sand and debris seized the perch. I used lots and lots of PB Blaster.....

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Big Phat R &raquo;</TD></TR><TR><TD CLASS="quote">BFH won't work??</TD></TR></TABLE>
Nope. Freaking pissed my off......

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Warren &raquo;</TD></TR><TR><TD CLASS="quote">Use PB Blaster and let it soak for a good bit. Also, make sure that you blast out any little rocks and crap that have stuck in the perch against the threads.

You're using a spanner wrench, right?

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

I tried the PB Blaster, and a toothbrush and water to clean up the threads. I used (2) 18" long pipe wrenches and it still wouldn't budge!

So to avoid damaging the shock body further, I decided to look for some new perches and just cut out the old one.......

 

Actually from the above pics, I was able to loosen the bottom perch. But the top perch was the one that was stuck like it was welded....

 

t00 da t0p.....

who has replaced their spring perches before?

 

Here's what I would try (so as to prevent damage to the shock):

Put two more perches on the shock and lock them together.

With a spanner wrench on one of those perches (to hold the shock in place), try to break the stuck perch free.

I would try breaking the perch free by turning it in both directions.

Good luck, that's some predicament you're in.

 

What did you end up doing?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by sackdz &raquo;</TD></TR><TR><TD CLASS="quote">What did you end up doing?</TD></TR></TABLE>

A pipe wrench, a freaking long pipe that slips over the perch wrench, plus a 5'4" 200 lbs man. With this combo, I was able to free up 3 shocks. But the driver's front is still seized like it's welded on.... I did't want to cause any more damages to the shock body so I gave up on that one.

So what I did was to buy an extra set of perch from KYB Japan, and put it on top of the seized perches. Since I have upgraded to stiffer and shorter springs, it worked out ok.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Wai &raquo;</TD></TR><TR><TD CLASS="quote">

A pipe wrench, a freaking long pipe that slips over the perch wrench, plus a 5'4" 200 lbs man. </TD></TR></TABLE> Reminds me of EFFECT's mom...


<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote &raquo;</TD></TR><TR><TD CLASS="quote">So what I did was to buy an extra set of perch from KYB Japan, and put it on top of the seized perches. Since I have upgraded to stiffer and shorter springs, it worked out ok.</TD></TR></TABLE> So you have an extra perch just chillin? That would bug me Better then a ruined shock though....

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by sackdz &raquo;</TD></TR><TR><TD CLASS="quote"> So you have an extra perch just chillin? That would bug me Better then a ruined shock though....</TD></TR></TABLE>

Yup 2 sets of perches for one spring.
I would cut out that seized **** later.

 

If you haven't already done so, put a good amount of anti-seize on the threads where the perches sit on. This would prevent you from having to deal with all of this again.

Just wondering, why didn't you just cut out that stuck perch?

 

Take one of the free perches to a machine/engineering shop. You could have them make the exact same perch for fairly cheap, hopefully you have a friend or some type of connection there. Also, they may be able to help a bit more w/removing the seized perch..ie cutting it out w/out damaging the threads on the shock.

It could *probobly* be produced on a lathe fairly easily..that way you could always have spares.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Saga &raquo;</TD></TR><TR><TD CLASS="quote">If you haven't already done so, put a good amount of anti-seize on the threads where the perches sit on. This would prevent you from having to deal with all of this again.

Just wondering, why didn't you just cut out that stuck perch? </TD></TR></TABLE>

Yes lots of anti-seize after I got the 3 shocks freed up! It's very messy but I would rather be messy than dealing with this hassle again. I didn't cut out the old ones because I don't have the right tool.

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by DsR &raquo;</TD></TR><TR><TD CLASS="quote">Take one of the free perches to a machine/engineering shop. You could have them make the exact same perch for fairly cheap, hopefully you have a friend or some type of connection there. Also, they may be able to help a bit more w/removing the seized perch..ie cutting it out w/out damaging the threads on the shock.
It could *probobly* be produced on a lathe fairly easily..that way you could always have spares.</TD></TR></TABLE>

I thought about having a machine shop to fab one but since I have friends in Japan so they just picked up couple sets for me from KYB and airmailed them over. Only took a week or so. (Both KYB US and Europe couldn't get the perches for me.)

 

every threaded-body shock will suffer from this unless they are cleaned and antiseized periodically.

you got lucky!

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Wai &raquo;</TD></TR><TR><TD CLASS="quote">I didn't cut out the old ones because I don't have the right tool. </TD></TR></TABLE>

Dremel is your friend.

 

Holy crap! My friend had the same problem. We just used a penetrating catalyst
and a BMFH.

*notice = not a BFH but a BMFH.

cheers

 

heat the perch and avoid heating the shock body.
the metal will expand and should help at least start working in some penetrating lubricant.

just be careful aroudn teh shock. excessive heat will explode it and send you to the hosptal.

repeat the heat procedure. Cycling the temp up and down may get you somewhere

its worth a shot