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01-15-2021, 06:39 PM
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#1 |
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Registered User
Join Date: Jun 2009
Location: Corona, ca
Posts: 406
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Coolant leak from oil pan
Got the truck up and running and have been trying to figure out my coolant issue. Thought I’d post here to see. I have a LM7 in my 49 3100. Swapped the oil pan with one that has a lower profile, but seems like I have a coolant leak in one of the spots that had a hole for a bolt but my block doesn’t have a bolt hole. Anyone run into this? When it’s @ 190 seems to just pour from there.
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01-15-2021, 09:05 PM
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#2 |
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Registered User
Join Date: Jun 2009
Location: Corona, ca
Posts: 406
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Re: Coolant leak from oil pan
Think i found the issues. Coolant temp sensor is leaking I’ll swap it when engine is cool again. Odd that oil pan bolt is not there though.
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01-15-2021, 11:11 PM
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#3 |
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60-66 Nut
  Join Date: Mar 2007
Location: Coeur d'Alene, Idaho
Posts: 23,254
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Re: Coolant leak from oil pan
I would have drilled and tapped the block for that bolt.
__________________
Power Steering Box Adapter Plates For Sale HERE Power Brake Booster Adapter Brackets For Sale '63-'66 HERE and '67-'72 HERE and '60-'62 HERE and "60-'62 with clutch HERE Rear Disc Brake Brackets For Sale. Impala SS calipers HERE Camaro Calipers HERE D52 Calipers HERE 6 Lug HERE Hydroboost Mounting Plates HERE |
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01-16-2021, 02:03 AM
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#4 |
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Registered User
Join Date: Jul 2012
Location: Whitehorse yukon
Posts: 1,218
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Re: Coolant leak from oil pan
Looks like the gasket is off center on that hole
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01-16-2021, 06:47 PM
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#5 |
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Registered User
Join Date: Jun 2015
Location: Carlos MN
Posts: 2,208
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Re: Coolant leak from oil pan
Be careful when you replace the temp sensor and don't over tighten as they will break quite easily. Ask me how I know.
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01-25-2021, 09:53 PM
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#6 |
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Roto Reuter thats the name...
Join Date: Feb 2010
Location: Darien, NY
Posts: 1,853
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Re: Coolant leak from oil pan
My LM7 is the same as yours. No bolt drilled / tapped there.
__________________
~ Dan  My 70 K10 SWB build:http://67-72chevytrucks.com/vboard/s...d.php?t=782232 My 71 SWB build:http://67-72chevytrucks.com/vboard/s...d.php?t=651394 1970 SWB Fleet K10 4X4, 5.3L LM7, 4L60E, Dakota Digital RTX, Vintage Air, Ididit tilt 1971 SWB Fleet C10 - Original SWB Arizona truck, new custom restoration project "Kick out your motor and drive while you're still alive - kick it out!" - Heart 1977 |
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01-25-2021, 10:29 PM
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#7 | |
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Registered User
Join Date: Jun 2009
Location: Corona, ca
Posts: 406
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Re: Coolant leak from oil pan
Quote:
Coolant temp sensor was backed out for some reason. Maybe when I had the engine out and cleaned everything. |
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01-26-2021, 09:41 PM
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#8 | |
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Roto Reuter thats the name...
Join Date: Feb 2010
Location: Darien, NY
Posts: 1,853
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Re: Coolant leak from oil pan
Quote:
__________________
~ Dan My 70 K10 SWB build:http://67-72chevytrucks.com/vboard/s...d.php?t=782232 My 71 SWB build:http://67-72chevytrucks.com/vboard/s...d.php?t=651394 1970 SWB Fleet K10 4X4, 5.3L LM7, 4L60E, Dakota Digital RTX, Vintage Air, Ididit tilt 1971 SWB Fleet C10 - Original SWB Arizona truck, new custom restoration project "Kick out your motor and drive while you're still alive - kick it out!" - Heart 1977 |
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