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[Black Diamond]

Looking at your pictures, I'm not seeing the spring that should be between the piston and the shoe.  Perhaps you indeed have one of those that was assembled incorrectly?  See attachment for proper assembly, remove the shoe and see if the spring is under the piston instead of on top.


Jerry

All the parts are there. I just put them together like that for the pics. All parts were replace with new @ no charge.

JW

[Black Diamond]

Jeff

Thanks for posting the pictures!
I'm amazed at the difference in wear between the primary and the secondary tensioners.
I wonder why that is.
Also you mentioned the new 590 cams from TR.
What is the difference from the old to the new?
I have had the old 590's in 2 bikes and they make the horsepower and torque but are very noisy.
On my 09 SEUC I changed my tensioners at 20K miles and now at almost 48 I guess I need to check them again.

                               

SBB
 

TR said the new 590s are on the same "profile" as his 525/555/625 cams. Those cams are significantly quieter than the original 590's. I can not give a good comparision as she need the pushrods adjusted better than how she is now. I had to get her out of there NOW.

JW

[Black Diamond]

Stock pump. What about the bypass spring? Bottom line, what kind of oil pressure are you used to seeing.
Because the tentioners are oil presure activated, its easy to speculate that increased oil pressure would result in increased
tensioner presure. And then increased wear? Again, just speculating, don't have any confirmed data confirming this.

Steve George
Fullsac Performance

Stock oil pump, no bypass spring. Oil pressure was measured by the shop, normal range. I happened upon a picture that shows one of the tensioners when the 1st T-Man cam switch was done at approx 15500 miles. That one looks good in this pic. 20000 miles later, not so much. 

[FR8TRN]

All the parts are there. I just put them together like that for the pics. All parts were replace with new @ no charge.

JW

So the spring was sticking out of the shoe when you first got to it??

[Black Diamond]

So the spring was sticking out of the shoe when you first got to it??

Nope. They were assembled just like the picture in grc. The metal in the shoe seen in the photo is the cup molded into the shoe material. This cup is what the spring & piston are assembled and function in.

JW

[Black Diamond]

Here's a pic a bottom of shoe and the molded in metal cup.

JW

[Black Diamond]

Close up of the top

JW

[110tHunDer]

All very valid points! My shop is closing so I'm looking into a couple of new builders. I'll see what they think and weight it out. I'll decide soon. Might be the winter build this year. The SESG2 is staying stock for now.

JW

What?!?!?

[FR8TRN]

Nope. They were assembled just like the picture in grc. The metal in the shoe seen in the photo is the cup molded into the shoe material. This cup is what the spring & piston are assembled and function in.

JW

Ahh, I see, thanks.

[1sharprdkg]

Looks like that could have went really bad at any second. Very good timing.

[Black Diamond]

Looks like that could have went really bad at any second. Very good timing.

That does seem to be the silver lining if there is one. I'm more concerned on:

what caused this failure
                    and
how make sure this doesn't happen again
                     or
does this require an annual inspection   

JW

[sadunbar]

That does seem to be the silver lining if there is one. I'm more concerned on:

what caused this failure
                    and
how make sure this doesn't happen again
                     or
does this require an annual inspection   

JW

That's the safe route...  Inspect tensioners, lifters, oil pump and crank runout...  It's an afternoon and a couple gaskets...   

[Black Diamond]

That's the safe route...  Inspect tensioners, lifters, oil pump and crank runout...  It's an afternoon and a couple gaskets...   

You right Scott.

I'm wondering if I have some of the shoe material blocking a passage in the motor which is causing the oil bypass thru the AC?

JW

[1sharprdkg]

That does seem to be the silver lining if there is one. I'm more concerned on:

what caused this failure
                    and
how make sure this doesn't happen again
                     or
does this require an annual inspection   

JW

I would love to have the answers to those questions myself. From my limited knowledge of the problem the annual inspection makes sense but still would not be 100% fool proof. For whatever reason today they can be fine then in sometimes small x=amount of miles have total failure. 

[Unbalanced]

That does seem to be the silver lining if there is one. I'm more concerned on:

what caused this failure
                    and
how make sure this doesn't happen again
                     or
does this require an annual inspection   

JW

Weld,true,pin and balance the crank and go with Gear Drives solves that worry