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Username Post: small block cracks        (Topic#355036)
corvesy 
"3rd Year" Gold Supporting Member
Posts: 666
corvesy
Reg: 08-07-08
01-31-19 11:37 AM - Post#2758665    

I am going to look at a 327-300 in the next few days to buy based on inspection. My question is where would cracks typically appear? I know to look in the head/valve area, but where may the other typical cracks occur.



 


grumpyvette 
Senior Chevytalk Moderator -- Performance Subject Matter Expert --
Posts: 17291
grumpyvette
Age: 71
Loc: FLORIDA USA
Reg: 03-16-01
01-31-19 11:52 AM - Post#2758668    
    In response to corvesy

lifter bores
and lifter gallery
,piston bore walls,
block main cap web support areas
heads between the valves in valve seat area
look for stripped head and manifold and oil pan mounting bolt threads,
in threaded holes and cracks in block radiating from the holes

http://garage.grumpysperformance.com/index.php?thr...











http://garage.grumpysperformance.com/index.php?thr...

http://garage.grumpysperformance.com/index.php?thr...

http://garage.grumpysperformance.com/index.php?thr...

http://garage.grumpysperformance.com/index.php?thr...


IF YOU CAN,T SMOKE THE TIRES AT WILL,FROM A 60 MPH ROLLING START YOUR ENGINE NEEDS MORE WORK!!"!
IF YOU CAN , YOU NEED BETTER TIRES AND YOUR SUSPENSION NEEDS MORE WORK!!


Edited by grumpyvette on 02-08-19 02:19 PM. Reason for edit: No reason given.

 
Shepherd 
Frequent Contributor
Posts: 1723

Loc: Lake George, NY
Reg: 11-11-15
01-31-19 04:13 PM - Post#2758693    
    In response to grumpyvette

Nicely done, Grump. Another area I've seen is between the freeze out core plugs on the sides of the block, usually caused by freeze ups.



Edited by Shepherd on 01-31-19 04:54 PM. Reason for edit: No reason given.

 
corvesy 
"3rd Year" Gold Supporting Member
Posts: 666
corvesy
Reg: 08-07-08
02-01-19 08:09 AM - Post#2758739    
    In response to Shepherd

As Shepherd said great info, I really appreciate it. I was planning on a visual inspection plus spray on crack penetrate in the problem area's. Thanks Grump.



 
Techhead 
Senior Member
Posts: 862
Techhead
Loc: Etobicoke, Canada
Reg: 10-25-05
02-08-19 02:15 PM - Post#2759407    
    In response to corvesy

Core shift would be another one to look at.



I'll be Frank, this hobby isn't getting any easier.
58 Delray in disaray


 


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