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  #1  
Old 07-12-2009, 08:42 AM
Ristow Ristow is offline
 
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Location: The Great Googley Moogley Midwest.
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Well...that don't give me a warm fuzzy feeling. *Updated*

pulled the motor out of the GW to put the fresh tranny in,and to find an evasive oil leak,and put the baffle on the bottom of the intake manifold. i also decided to pull the heads and see how the cylinders were looking.

looks like the pistons were a little tight in the bores to me.





those scores can be seen but not felt. but the oil film barrier was definitely broken. 180 degrees from the pin,looks like it got tight right below the rings.

oh,found the leak too. the plug on the right.




will be loading this up later today and swinging by the machine shop for a visit tomorrow.
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Ristows right.................again,




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I LOVE how Ristow has stolen my comment about him ... "Quoted" it ... and made himself famous for being an ***hole to people. Hahahahahahahahahha!


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fsjbuilder.org come for the mindless chat,stay for the hand drawn emoticons.

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Last edited by Ristow : 09-19-2009 at 06:45 PM.
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  #2  
Old 07-12-2009, 08:49 AM
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bigun bigun is offline
 
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You didn't check the ring gaps before you put it together?
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congrats...that's the first post on here I have absolutely no effing clue how to comment on.


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  #3  
Old 07-12-2009, 08:52 AM
Ristow Ristow is offline
 
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Quote:
Originally Posted by bigun
You didn't check the ring gaps before you put it together?

of course i did. i fit the rings. that aint ring scoring,that's piston scoring.
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Originally Posted by Hankrod
Ristows right.................again,




Quote:
Originally Posted by Fasts79Chief
... like the little 'you know what's' that you are.




Quote:
Originally Posted by Fasts79Chief
I LOVE how Ristow has stolen my comment about him ... "Quoted" it ... and made himself famous for being an ***hole to people. Hahahahahahahahahha!


→ Where the kids hang out...

fsjbuilder.org come for the mindless chat,stay for the hand drawn emoticons.

It's like you're unraveling a big cable-knit sweater that someone keeps knitting...and knitting...and knitting...and knitting...
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  #4  
Old 07-12-2009, 10:12 AM
jeepguzzi jeepguzzi is offline
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Maybe those aren't AMC 360 pistons. Maybe they are Dodge 360 pistons.

We once took a straight 6 Ford motor to the machinist for a rebuild. He pulled out pistons from a 400 V8 or something.
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  #5  
Old 07-12-2009, 10:44 AM
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NVJEEPER NVJEEPER is offline
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Oh man, is that the roller rocker'd engine? Cool find on the oil leak!
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  #6  
Old 07-13-2009, 04:06 AM
Ristow Ristow is offline
 
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wiseco pistons. yah,it's the roller rocker engine.
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Quote:
Originally Posted by Hankrod
Ristows right.................again,




Quote:
Originally Posted by Fasts79Chief
... like the little 'you know what's' that you are.




Quote:
Originally Posted by Fasts79Chief
I LOVE how Ristow has stolen my comment about him ... "Quoted" it ... and made himself famous for being an ***hole to people. Hahahahahahahahahha!


→ Where the kids hang out...

fsjbuilder.org come for the mindless chat,stay for the hand drawn emoticons.

It's like you're unraveling a big cable-knit sweater that someone keeps knitting...and knitting...and knitting...and knitting...
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  #7  
Old 07-13-2009, 04:54 AM
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lost1 lost1 is offline
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Ouch! Well it ain't warm and fuzzy, but at least it got discovered when it did.
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  #8  
Old 09-19-2009, 06:46 PM
Ristow Ristow is offline
 
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goin' back to the assembled side...



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Quote:
Originally Posted by Hankrod
Ristows right.................again,




Quote:
Originally Posted by Fasts79Chief
... like the little 'you know what's' that you are.




Quote:
Originally Posted by Fasts79Chief
I LOVE how Ristow has stolen my comment about him ... "Quoted" it ... and made himself famous for being an ***hole to people. Hahahahahahahahahha!


→ Where the kids hang out...

fsjbuilder.org come for the mindless chat,stay for the hand drawn emoticons.

It's like you're unraveling a big cable-knit sweater that someone keeps knitting...and knitting...and knitting...and knitting...
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  #9  
Old 09-19-2009, 06:50 PM
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PlasticBoob PlasticBoob is offline
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Man, that sucks! So how does that happen? Too hot? And what does one do to prevent it from happening again?
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  #10  
Old 09-19-2009, 07:03 PM
Ristow Ristow is offline
 
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well....i think it's a compound problem.

i sent the pistons back to wiseco,they wanted a look at them. no signs of heat,however the pistons were spec'd incorrectly by the rather well known speed shop that "built" the kit for me. that same guy bailed on me when i got the pistons and found they were built to the early block deck height. he said it was between me and wiseco now. cost me a couple hundred to deck the block/plane the manifold. great customer service.

turns out,he spec'd a 360 piston with a 1" pin and the custom-(incorrect)- deck height. he should have discussed what my intentions were,which i covered in great detail,because Wiseco would have instead used thier standard 401 forging,and turned it down to my bore. the 401 has a rather severe rod angle. the 401 forging they use is a different alloy,and barrel shape to combat the scuffing these engines are prone to.


however,i don't think that was THE issue. the scuffing-polishing really,the markings couldn't be felt-was very inconsistent. i think what really did it was one of the mornings last winter when it was -28 degrees out,my coolant was froze up,too thick for the waterpump to push through. the engine would build up heat till it finally pushed through,at which time the engine would return to normal temp. i would have been inside drinking coffee while this was happening.


block has a fresh hone. fresh crank,bearings,rings. going to advance the cam this time too. using Hastings rings this time too,my preferred brand.
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Quote:
Originally Posted by Hankrod
Ristows right.................again,




Quote:
Originally Posted by Fasts79Chief
... like the little 'you know what's' that you are.




Quote:
Originally Posted by Fasts79Chief
I LOVE how Ristow has stolen my comment about him ... "Quoted" it ... and made himself famous for being an ***hole to people. Hahahahahahahahahha!


→ Where the kids hang out...

fsjbuilder.org come for the mindless chat,stay for the hand drawn emoticons.

It's like you're unraveling a big cable-knit sweater that someone keeps knitting...and knitting...and knitting...and knitting...
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  #11  
Old 09-19-2009, 07:13 PM
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grand_wag_85 grand_wag_85 is offline
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What will the finished power specs be Mike?
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  #12  
Old 09-19-2009, 07:18 PM
Ristow Ristow is offline
 
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really aint got a clue. it was a very nice engine to drive. torque right off idle,pulled nicely,even with the stock exhaust. lean into the throttle a little to pass,no need for passing gear. burned 87 octane no problem.

consistently got over 13.5 mpg's too.
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Quote:
Originally Posted by Hankrod
Ristows right.................again,




Quote:
Originally Posted by Fasts79Chief
... like the little 'you know what's' that you are.




Quote:
Originally Posted by Fasts79Chief
I LOVE how Ristow has stolen my comment about him ... "Quoted" it ... and made himself famous for being an ***hole to people. Hahahahahahahahahha!


→ Where the kids hang out...

fsjbuilder.org come for the mindless chat,stay for the hand drawn emoticons.

It's like you're unraveling a big cable-knit sweater that someone keeps knitting...and knitting...and knitting...and knitting...
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  #13  
Old 09-19-2009, 07:28 PM
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grand_wag_85 grand_wag_85 is offline
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Dern! Well when it comes time for me to rebuild the 401 in my '76 I will be picking your brain a bit
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  #14  
Old 09-19-2009, 10:03 PM
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cu4whln cu4whln is offline
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Quote:
Originally Posted by Ristow
goin' back to the assembled side...




Jeep Porn 101 . . . yea, I like to watch !!

I frinkin' love engine in process / building shots!

Hope "round 2" works out well for you.
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  #15  
Old 09-20-2009, 12:38 PM
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mattmopar440 mattmopar440 is offline
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so you didnt have to bore it out that at least a little good news mike
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  #16  
Old 09-20-2009, 12:48 PM
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Gambler68 Gambler68 is offline
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Good luck man. Sucks the shop bailed on ya, that's his rep now to deal with. Hope all goes smooth from here on out.
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  #17  
Old 09-20-2009, 08:22 PM
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Glad you got it worked out, sucks that the shop owner bailed on you though
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Quote:
Originally Posted by Gambler68
congrats...that's the first post on here I have absolutely no effing clue how to comment on.


How you behave toward cats here below determines your status in Heaven.
Robert A. Heinlein
The birth of CROM is recorded here
http://www.alaska4x4network.com/showthread.php?t=7778
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  #18  
Old 09-20-2009, 10:26 PM
twisted frame twisted frame is offline
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I'm just learning about inner engine problems, terminology and pretty much anything to do with the rotating assembly. I can see where you've pointed out the issue with the scoring on the piston wall and *I think* I understand what you mean when saying it's perpendicular to the wrist pin.

Is there anything else obvious in the photos that show other problems? I'm just curious. Does the fact that the oil barrier was broken only apply to the scoring on the piston wall or does that refer to the lighter-colored markings on the center of the piston too?
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Last edited by twisted frame : 09-20-2009 at 10:29 PM.
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  #19  
Old 09-21-2009, 03:31 PM
Ristow Ristow is offline
 
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the oil film barrier refers to the cylinder/skirt scuffing. the markings on the top of the piston are from combustion.

Quote:
I think* I understand what you mean when saying it's perpendicular to the wrist pin.

that is where pistons scuff first when they get tight,for whatever reason.it is the largest diameter area.
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Quote:
Originally Posted by Hankrod
Ristows right.................again,




Quote:
Originally Posted by Fasts79Chief
... like the little 'you know what's' that you are.




Quote:
Originally Posted by Fasts79Chief
I LOVE how Ristow has stolen my comment about him ... "Quoted" it ... and made himself famous for being an ***hole to people. Hahahahahahahahahha!


→ Where the kids hang out...

fsjbuilder.org come for the mindless chat,stay for the hand drawn emoticons.

It's like you're unraveling a big cable-knit sweater that someone keeps knitting...and knitting...and knitting...and knitting...
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  #20  
Old 09-21-2009, 04:39 PM
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mattmopar440 mattmopar440 is offline
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I really looking forward to tearing into my 401 and seeing whats up .....Not but why I'm in there I'll throw some 10.0-1 pistons in there to keep up with maniac mike
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