Progress Thread Monkeybutt2000's 89 vert build thread- teardown results☹️

lemosley1973

Doing something with a heavy tranny now
Feb 18, 2019
221
73
38
48
Clover, SC
I’m gonna have to say insufficient ring end gap.
The PN on the piston is from Wiseco. It’s a 4032 alloy forging..typically ran with very tight tolerances in the bore, because it doesn’t expand very much ( comparably) when it gets hot.
But the rings do...
The wrong end gap will cause them to butt when exposed to heat from too much of a power adder, and not enough timing removed. Certain alloys expand at different rates than the ring, and a “too tight” ring will basically cut the ring land right off the piston.
Thats what that looks like was starting to happen to me.
I'd have thought the crack would be near the gap in the ring (do they really expand that much to cover that much space?)

Does the ring end gap move around the piston or does the ring stay in the same place once in the bore? I've always wondered about that.
 
  • Sponsors(?)


Noobz347

Stangnet Facilities Maint Tech... Er... Janitor
Admin Dude
Jan 4, 1985
29,994
11,555
234
Box behind Walmart
www.stangnet.com
Opinions please. I've had this 83 GT hood scoop for years. Decided to plop it on to see what it looked like. I like it,and will cut out underneath to let the heat out.
IMG_20200427_151520314.jpg
IMG_20200427_151529294_HDR.jpg

I have an unexplainable affection for these.


Lots of good stuff in this thread. Best of luck going forward. :nice:

Sooner or later the car will realize what's happening and begin working [with] you. :)
 

Monkeybutt2000

Advanced Member
Aug 11, 2019
513
351
73
49
Lafayette,IN
Thought I'd throw up a pic collage of some previous rides
 

Attachments

  • IMG_20210110_160913026.jpg
    IMG_20210110_160913026.jpg
    473.3 KB · Views: 5
  • IMG_20210110_160941552.jpg
    IMG_20210110_160941552.jpg
    420 KB · Views: 8
  • IMG_20210110_160956582.jpg
    IMG_20210110_160956582.jpg
    481 KB · Views: 6
  • IMG_20210110_161011234.jpg
    IMG_20210110_161011234.jpg
    466.7 KB · Views: 6
  • Like
Reactions: 90sickfox