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post #1 of 6 (permalink) Old Apr 15th, 04, 03:39 PM Thread Starter
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How hard is it to remove the plugs on the bottom sides of the block? I'm pulling the engine from my car to sell and I want to drain all the coolant out before the buyer comes to pick it up.

I'm also going to drop in my freshly built 302 engine and was wondering if there are any problems if the block is not loaded with coolant at first start-up but the radiator will be and coolant will be handy to fill when needed? [img]graemlins/beers.gif[/img]

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post #2 of 6 (permalink) Old Apr 15th, 04, 04:53 PM
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Some of those plugs are nearly impossible to get out and some aren't bad. The block will fill as you fill the radiator.
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post #3 of 6 (permalink) Old Apr 15th, 04, 05:03 PM
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Don't fire the engine with only filling the radiator. The thermostat will prevent the block from filling completely, usually to the point of causing it to overheat. You need to fill it properly and it's simple. Just put the engine in, hook up the hoses, and remove the thermostat housing and thermostat. Fill the block completely there, re-install the thermostat and housing, and then finish filling the radiator. You will also want to check the fluid level after the first couple of heat cycles.


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post #4 of 6 (permalink) Old Apr 15th, 04, 05:27 PM
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I usually drill a 1/8" hole in my thermostat to let the air escape during the initial radiator fill to prevent the problem camcojb is talking about. I don't know why the thermostat manufacturers don't do that from the factory. I figure they would, but then they have to add a machineing operation to the assembly line.

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post #5 of 6 (permalink) Old Apr 21st, 04, 11:00 AM
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The failsafe thermostat by MOTORAD has the little hole in it. I've been using one for a while now. If it fails it will lock in the open position. They really do work.
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post #6 of 6 (permalink) Old Apr 22nd, 04, 01:32 AM
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I have always found some gorilla has tightened those block drain plugs. I have broken many a Snap-On socket trying to unscrew.

I cannot suggest enough to use a 1/2 inch drive 6-point socket and an 18 inch flex handle. Better is a 6-point box end wrench, the closer your torque is to the same plane as the hex flats, the less chance of the wrench slipping off and rounding the corners.

Wait until the radiator is in the car to start up the engine. After an engine has been setting for a while, one should treat it as a new camshaft equipped engine and break it in as the same.

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