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Apr 26th, 2026 | | AD Chevy Trucks  Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
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| | | | Joined: Jan 2017 Posts: 62 'Bolter | | 'Bolter Joined: Jan 2017 Posts: 62 | Hello, I'm currently tearing down a 261 out of a 1957 Pontiac car to put in my 1949 3/4 ton. Found some coolant sitting on a couple of the lifters at the back of the engine as per the picture. The oil I drained out actually looked really nice, wasn't any evidence of coolant in it. What does this look like to you guys? Crack in block by chance? After its torn down it'll be getting sent to a shop to be checked for cracks but if this is a red flag I'll probably be looking for a new motor. Thanks! http://tinypic.com/r/24fe538/9 | | | | | Joined: Feb 2004 Posts: 29,774 Kettle Custodian (pot stirrer) | | Kettle Custodian (pot stirrer) Joined: Feb 2004 Posts: 29,774 | Has the cylinder head been removed yet? If so, you're probably seeing a little coolant that dribbled down the oil return holes as the head was lifted off. Any machine shop worthy of spending money with will have a way of pressure testing the cooling passages. I used to make a couple of block-off plates for small block V8's with the pistons removed and the heads installed and plumb a garden hose into the cooling system if I suspected cracks. City water pressure in a block or a head finds leaky spots in a hurry!
Jerry
"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!
| | | | | Joined: Jan 2017 Posts: 62 'Bolter | | 'Bolter Joined: Jan 2017 Posts: 62 | Yes that'd explain it. Thanks for the quick response. Thought I should ask the pros before sinking a bunch of money into it at a machine shop. | | |
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