Show and tell

Old 06-09-2007, 08:11 PM
  #1  
mytmouz
Senior Member
RACING JUNKIE
Thread Starter
 
mytmouz's Avatar
 
Join Date: May 2006
Location: Pelahatchie, MS
Posts: 1,005
Default Show and tell

Well I've got to pull me engine and do a tear down inspection. Give your opinion as to what's wrong, and when I get it out we will see. I've got an iron block/aluminum headed small block. It has head studs which are sealed, oringed heads/reciever grooved block, copper head gaskets that were retorqued after the 2nd heat cycle. (six passes now). The block is partially block filled. When I dropped the pan to fix an oil leak, I noticed water dripping between the # 4 piston skirt and the cylinder wall. When I rotated the crank to look in the bottom of the cylinder (it was at the bottom of the stroke) water ran out of the header when the exhaust valve open. It did not run hot (over 180) at any time and the water was not mixed with the oil. What's your guess? I'm going with a cracked cylinder as that's the way my luck goes.
mytmouz is offline  
Old 06-09-2007, 11:46 PM
  #2  
zipper06
Senior Member
RACING JUNKIE
 
Join Date: Jan 2006
Location: La.
Posts: 2,890
Default

Well Neighbor,
Either way it doesn't sound good. I thought you had a Dart lillte "M" blk in the truck, which at 4.125 bore should never crack.
Which ever way it goes let us know.

Zip.
zipper06 is offline  
Old 06-10-2007, 05:42 AM
  #3  
davis419b
Senior Member
EXPERT BUILDER
 
Join Date: Jul 2005
Location: Wylie,Texas
Posts: 276
Default

If the block was a Dart it probably would not have grout in it. I bet it is a GM 400 and i am going with a cracked cylinder wall. I have had it happen in the 10 tears i ran a 377 sbc,
davis419b is offline  
Old 06-10-2007, 07:54 AM
  #4  
mytmouz
Senior Member
RACING JUNKIE
Thread Starter
 
mytmouz's Avatar
 
Join Date: May 2006
Location: Pelahatchie, MS
Posts: 1,005
Default

It's factory GM, sorry I left that out. However it turns out, I'm gonna go aftermarket this time. *$@# budget racing. :lol:
mytmouz is offline  
Old 06-10-2007, 11:29 AM
  #5  
jaykz1000
Member
MASTER JOURNEYMAN
 
Join Date: Nov 2005
Posts: 48
Default

yep i had a 509 block ran it for 2 years had cometic gaskets on it always thought they leaked some over night... so i just drained the radiator after racing and went on with it ... then i had to take engine apart one day and found i had a hair line crack in one of the cylinder walls toward the lifter bores... it was about 3 inchs long... u could barely even see it ...been runnin it like that for 2 years .lol thank god it wasnt on the thrust side.. prolly tore up everything heck i ran compression and all on this engine many times and it was fine... i have had many 350 block crack and u can tell when they did be a wide crack...
jaykz1000 is offline  
Old 06-10-2007, 04:08 PM
  #6  
knova70
Senior Member
SENIOR BUILDER
 
Join Date: Feb 2005
Posts: 122
Default

I guarantee it was cracked at the steam hole,usually the top one and after it cracks from the stress of the head stud and cylinder pressure,then the crack starts to run down the cylinder wall,after taking my 400 apart for the same reason that was what it was,and it cracked on every top steam hole but only 2 cylinders were cracked,and this was a virgin block with only about 30 passes on it,it was maged before it was machined,but thats what I get for using a stock block! went to a bowtie aluminum block as of now hope this one doesn't crack?
knova70 is offline  
Old 06-10-2007, 05:03 PM
  #7  
jaykz1000
Member
MASTER JOURNEYMAN
 
Join Date: Nov 2005
Posts: 48
Default

my holes where plugged and then decked
jaykz1000 is offline  
Old 06-10-2007, 05:20 PM
  #8  
knova70
Senior Member
SENIOR BUILDER
 
Join Date: Feb 2005
Posts: 122
Default

they still will crack,doesn't matter what you do to them,just personal experience.
knova70 is offline  
Old 06-11-2007, 01:47 PM
  #9  
jaykz1000
Member
MASTER JOURNEYMAN
 
Join Date: Nov 2005
Posts: 48
Default

never said they wouldnt just statin that they can crack any where anyway...
jaykz1000 is offline  
Old 06-11-2007, 03:07 PM
  #10  
bjuice
Administrator
RACING JUNKIE
 
bjuice's Avatar
 
Join Date: Apr 2003
Location: Greenville s.c.
Posts: 3,236
Default

have the heads had any work done to them ?..i have seen over agreesive port work done where the exhaust valve bowl developed a hair line crack..you could not see by looking at it...i did a backyard pressure test..DAWN dishwashing liquid and a air pressure hose...showed right up.

it did not run hot..when the motor got warm the crack in the heads would expand and leak fluid into the #8 cylinder..after it sat for a while the cylinder would fill up...

if there was any epoxy work done to the heads it could have come loose...SO DO NOT PUT ALL THE EGGS IN THE BASKET ON THE BLOCK BEING BAD AT THIS POINT..

brian
__________________
Bjuice..

"I'M YOUR HUCKLEBERRY ! "
bjuice is offline  

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service - Do Not Sell My Personal Information -