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Automotive Repair Car Troubleshooting Topics   Car Troubleshooting   Engine Troubleshooting   Engine Fault Codes   Electrical and Wiring   Transmission Problems Car Repair Topics   Car Making Noises   Car Stereo Repair   Heating or AC Issues   Motorcycles and ATVs   Tricks of the Trade   Truck Repair Advice Site Options:      Login   Sign up here! Latest Forum Post   2011 Dodge Nitro OBD scanner seems to drain battery in 10-20 minutes When I bought this car in summer 2023, a... Grounding Cable, 2017 Jeep Renegade Trailhawk The Cable that connects my negative batt... Rough Idle (Found new thing) Hi everyone. First of all sorry for bad ...     equipment hey yall. im a first year engineering st...   HELP I have a 1956 1/2 ton panel truck, 69 35...   Howdy     Just wanted to s...   ABS/Tractiob/Brake Lights on But No DTCs Hello all, Recently while driving m...   Chevy strut replacement I'm trying to get a sensor of some kind ...   2020 suburban new transmission and issues after install recently had the transmission fail at 11...   Caliper piston post cleaning won't screw in Hello, 2013 Hyundai Elantra limited (ma...

Search Auto Parts Search 1970 351 Cleveland coolant in crankcase Sign up here!   Email This Post Auto Repair Home>> Automotive Repair>> Engine Troubleshooting dmac0923 Enthusiast May 11, 2016, 12:54 PM Post #1 of 5 (1343 views) 1970 351 Cleveland coolant in crankcase Sign In i have a 1969 mustang that has a 1970 351 Cleveland motor. The car has been sitting about 2 years (kids lol). The engine ran fine when last parked. Went to get the car up and running for this summer....today i pulled the oil pan drain plug and saw antifreeze coming out with the oil. Clevelands use a dry intake manifold. So now im thinking its probably a blown head gasket or a cracked block. Its been quite a few years since ive torn into this motor, im just trying to think of any other places that a seal/gasket could fail allowing coolant to seep in. thanks in advance __________________________________________________ 2015 Jeep Grand Cherokee 2002 Ford Ranger 2004 Toyota Corolla 1969 Ford Mustang Mach 1 Hammer Time Ultimate Carjunky / Moderator May 11, 2016, 1:18 PM Post #2 of 5 (1341 views) Re: 1970 351 Cleveland coolant in crankcase Sign In If it wasn't being used when it happened, I'd tend to blame the cold and something frozen causing a crack. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional. dmac0923 Enthusiast May 11, 2016, 1:29 PM Post #3 of 5 (1336 views) Re: 1970 351 Cleveland coolant in crankcase Sign In any ideas how i can start to trace the source down? __________________________________________________ 2015 Jeep Grand Cherokee 2002 Ford Ranger 2004 Toyota Corolla 1969 Ford Mustang Mach 1 Hammer Time Ultimate Carjunky / Moderator May 11, 2016, 2:00 PM Post #4 of 5 (1334 views) Re: 1970 351 Cleveland coolant in crankcase Sign In Pressure test would be the first step but tear down may be the ultimate method. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional. Tom Greenleaf Ultimate Carjunky / Moderator May 11, 2016, 4:24 PM Post #5 of 5 (1326 views) Re: 1970 351 Cleveland coolant in crankcase Sign In Yes - pressure test and pull spark plugs that should NEVER see coolant. Hard engine to plain blow head gaskets but freezing sure will. Real trivia. If a mix of Ethylene/Glycol was used and you can test it to at least around 15+Fahenheit that level of mix freezes below that but doesn't expand and break things. Also know that "freeze plugs" are not to protect it rather called "core plugs" used to blow sand out of the casting when made nothing to do with real freezing and expansion any which way. One or more could pop crooked and still wreck the engine. Gaskets, water jackets out or into cylinders the block would be done with. I've seen some hack brazing externally but that isn't it as it wouldn't be in the oil - bummer! Outside chance timing cover gaskets or a bolt into block thru water pump and cover just a slight maybe?? Tom (This post was edited by Tom Greenleaf on May 11, 2016, 4:32 PM)   Email This Post   Automotive Repair     Auto Body Repair and Refinishing     Heating or AC Issues     Electrical and Wiring     Brake Systems     Car Stereo Repair Advice     General Discussions     Car Making Funny Noises     Engine Fault Codes     Engine Troubles     Exhaust Systems     Steering and Suspension     Transmission Troubles     Tricks of the Trade Automotive World     General Discussions     Antique Car Talk     Car Shows and Events     The Bargin Bin     Motor Vehicle Inspection     Car Care Tips     Traffic Tickets     Gasoline, Motor Oils, Concept Cars and Engines     Auto Insurance, Financing, Leases, Warranties Truck Repair     General Discussions     Truck Engine Repair     Truck Suspension Repair Motorcycle Repair     General Discussions     Motorcycle Engine Repair CarJunky     Open Posting     Board FAQ's     New Board Suggestions

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