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Bummer!
#1368612 Sat Jul 11 2020 12:40 AM
Joined: Mar 2010
Posts: 9,295
5
52Carl Offline OP
Master Gabster
My Baby's 235 threw a rod today. #5 connecting rod snapped off at the wrist pin. The wrist pin bolt was still in place, but in the bottom of the oil pan. I drain the oil into a 7 quart drain pan and it almost went over the top. Had quite a bit of coolant in it.
I pulled the oil pan and looked up to see coolant slowly streaming down the side of the cylinder. The piston is all the way to the top and the coolant appears to be passing by the piston. I am hoping that the piston got slammed into the head hard enough to crack the head instead of having a cracked block. There is a chunk missing from the bottom of the piston skirt, indicating that the lose rod caught it and possibly slammed the piston into the head hard enough to crack it.
I could not tell how bad the rod may have scored the cylinder. Hard to get a good look with coolant dripping into ones eyes.
I will be pulling the head tomorrow morning before it reaches 157 degrees like it was this afternoon. Humid too.
I will keep you posted.

Re: Bummer!
52Carl #1368617 Sat Jul 11 2020 01:13 AM
Joined: Feb 2004
Posts: 20,564
H
Boltergeist
You've probably got a cracked cylinder wall, but don't trash the block. As long as it has at least 1/2"-3/4" of undamaged cylinder wall at the top and bottom, a sleeve can be installed and the block can be salvaged. Most likely, you've also got a badly scored crankshaft on the cylinder with the broken rod- - - -that type of failure is usually caused by the rod bearing locking up and snapping the rod off. Good luck!
Jerry


The murder victim was drowned in a bathtub full of Rice Krispies and milk.
The coroner blamed the crime on a cereal killer!

Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
Re: Bummer!
52Carl #1368618 Sat Jul 11 2020 01:14 AM
Joined: May 2015
Posts: 2,477
K
Housekeeping (Moderator) Making a Stovebolt Bed & Paint and Body Shop Forums
That's always a sick feeling in the pit of the stomach. frown
Hope for the best, but prepare for the worst.


Kevin
First car '29 Ford Special Coupe
#2 - '29 Ford pickup restored from the ground up.
Newest Project - 51 Chevy 3100 work truck. Photos [flickr.com]
Busting rust since the mid-60's
Re: Bummer!
52Carl #1368629 Sat Jul 11 2020 02:54 AM
Joined: Apr 2016
Posts: 539
M
Shop Shark
Definite bummer! I'm betting you will recover though. Keep us posted. Lots of us have parts laying around.


Old enough to know better, too young to resist.
Re: Bummer!
52Carl #1368686 Sat Jul 11 2020 04:44 PM
Joined: Sep 2011
Posts: 710
B
Shop Shark
Start the search for a 261.


BC
1960 Chevy C10 driver 235 T5 3.73 dana 44
1949 GMC 250 project in waiting
1960 C60 pasture art
G.M dealer tech since 1980 & counting
Re: Bummer!
BC59 #1368748 Sun Jul 12 2020 01:41 AM
Joined: Mar 2010
Posts: 9,295
5
52Carl Offline OP
Master Gabster
Originally Posted by BC59
Start the search for a 261.
I am, but I don't want to have to wait months to receive the 261 from my machine shop. Its not the only shop in town, but is the only one that I trust. If I do find a rebuildable 261, I will snatch it up, have it built and keep it in my inventory.
I will have the engine on a stand tomorrow morning to assess the extent of the damage. I have my fingers crossed that a sleeve will be an option. My machine shop should be able to knock that out pretty quick.
The '53 full pressure 235 only had 22,000 miles on a complete rebuild and ran like a top. Idled smooth as silk, plenty of oil pressure, and impressive power for what it is.
To be continues...

Re: Bummer!
52Carl #1368756 Sun Jul 12 2020 02:45 AM
Joined: Jan 2013
Posts: 1,755
Shop Shark
Carl,

Look in the selling! I bought one from a guy in Lexington, KY. He had another one sitting there. I checked the numbers.

Chris

Re: Bummer!
52Carl #1368757 Sun Jul 12 2020 02:46 AM
Joined: Jan 2013
Posts: 1,755
Shop Shark

Re: Bummer!
52Carl #1368868 Mon Jul 13 2020 03:00 AM
Joined: Mar 2010
Posts: 9,295
5
52Carl Offline OP
Master Gabster
Update! Got the engine out of the truck, on an engine stand and took off the head. I have a 2" vertical crack which begins 2 1/4 inches below the top of the cylinder. Just like HRL predicted.
I will be taking the stripped block to the machine shop tomorrow to see it they will sleeve it and bore it to .040 oversize like the rest of the cylinders.

Re: Bummer!
52Carl #1368877 Mon Jul 13 2020 03:55 AM
Joined: Jan 2013
Posts: 1,755
Shop Shark
Good luck!

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