On May 22, 9:17*am, "*e#c" wrote:
On May 21, 5:07*pm, bpuharic wrote:

i dont think mine are...but just curious about the warning signs...

Are they used in Salt, or Fresh Water?

Cracks on the outside ( you'll see rust stains ) . Cracks on the
inside are hard to immediately see. Over heating is a sure sign. Using
clear tubing while idling...do you see any bubbles passing through? I
just rebuilt my 40 year old Risers over the winter. Soaking them in
Pickling Vinegar worked great to clean them out. After that, I scored
out the cracks very slightly with the Dremel, and put a nice coat of
JB Weld over top, followed by a coat of Tremclad white.The finishing
touch was to paint the Exhaust Stubs with High Heat Enamel. They do
look nice now.

You need to buy some new risers. JBWeld is not going to stay in
cracks, the expansion coefficient is to different. You're just asking
for problems.

On Mon, 24 May 2010 05:08:20 -0700 (PDT), jamesgangnc
wrote:

You need to buy some new risers. JBWeld is not going to stay in
cracks, the expansion coefficient is to different. You're just asking
for problems.

Excellent advice.

On May 24, 8:08*am, jamesgangnc wrote:
On May 22, 9:17*am, "*e#c" wrote:

On May 21, 5:07*pm, bpuharic wrote:

i dont think mine are...but just curious about the warning signs...

Are they used in Salt, or Fresh Water?

Cracks on the outside ( you'll see rust stains ) . Cracks on the
inside are hard to immediately see. Over heating is a sure sign. Using
clear tubing while idling...do you see any bubbles passing through? I
just rebuilt my 40 year old Risers over the winter. Soaking them in
Pickling Vinegar worked great to clean them out. After that, I scored
out the cracks very slightly with the Dremel, and put a nice coat of
JB Weld over top, followed by a coat of Tremclad white.The finishing
touch was to paint the Exhaust Stubs with High Heat Enamel. They do
look nice now.

You need to buy some new risers. *JBWeld is not going to stay in
cracks, the expansion coefficient is to different. *You're just asking
for problems.

Thats funny, because the last application lasted TWO YEARS without
water penetrating through it. And the only reason I removed that
application, was to boil them out. I've had that statement said to me
before.
It has also lasted over two years on the block cracks the engine has .
I check them constantly. Are you getting your information first hand,
as in your experience...or just heresay?
If its first hand, you didnt clean the repaired area well enough.