262 Block - External Crack

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   I have two G262 blocks that appear to be cracked just to the rear of the carburetor, underneath the manifold. Is a vertical crack in this spot caused by freezing, or something else?
If I recall correctly the WC/WD/etc. blocks always cracked horizontally behind the carb. I was wondering if the cracks I'm seeing in the 262s are typical of freezing.

One has been repaired with a bolted on plate over the top of it, and the other appears to have been running for some time and has just slightly been seeping.

EDIT: Meant rear of carb, not front... Towards the flywheel side. Dave, will look to see if it's between which cylinders later.

Edited by wjohn - 19 Mar 2024 at 6:02am

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wjohn Members Profile Send Private Message Find Members Posts Add to Buddy List Orange Level Joined: 19 Jan 2010 Location: KS Points: 1998	Post Options Post Reply Quote wjohn Report Post Thanks(0) Quote Reply Topic: 262 Block - External Crack Posted: 18 Mar 2024 at 11:19pm
	I have two G262 blocks that appear to be cracked just to the rear of the carburetor, underneath the manifold. Is a vertical crack in this spot caused by freezing, or something else? If I recall correctly the WC/WD/etc. blocks always cracked horizontally behind the carb. I was wondering if the cracks I'm seeing in the 262s are typical of freezing. One has been repaired with a bolted on plate over the top of it, and the other appears to have been running for some time and has just slightly been seeping. EDIT: Meant rear of carb, not front... Towards the flywheel side. Dave, will look to see if it's between which cylinders later. Edited by wjohn - 19 Mar 2024 at 6:02am
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DiyDave Members Profile Send Private Message Find Members Posts Add to Buddy List Orange Level Access Joined: 11 Sep 2009 Location: Gambrills, MD Points: 51760	Post Options Post Reply Quote DiyDave Report Post Thanks(0) Quote Reply Posted: 19 Mar 2024 at 4:28am
	Water freezing and cast iron can be pretty odd sometimes. I haven't seen many 262 cracks, mostly like you, the 4 cyls tend to be horizontal... Is/are the cracks centered on a specific cyl? Sometimes a vertical crack can be indicative that a rod snapped, rapped the side of the block, causing a crack. Inspection from the inside would reveal if this is the cause...
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