Coolant drain plug on block - Team Camaro Tech
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post #1 of 10 (permalink) Old May 9th, 05, 01:04 AM Thread Starter
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Coolant drain plug on block

I am having trouble getting one onf the coolant drain plugs out of the engine block. I tried heating it up, I have penetrating oil soaking in right now..but it wont budge. The other side came right out. I drilled out the center of the plug and am trying to get it out with an easy out, but no go. Anyone ever wrestle with one of these before and have a good tip on how to get it out. Engine is on a stand at the moment.

thanks

1973 RS Z28: 401ci Dart Little M, Littlefield 6-71 supercharger @14lbs boost, Callies Magnum crank, Lunati rods, JE pistons, 7.8:1, AFR 227 Comp heads, T&D 1.6 shaft rockers. Reed solid FT cam (240/[email protected]/.542 lift-112 LSA), QFT 750 carbs
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post #2 of 10 (permalink) Old May 9th, 05, 02:40 AM
 
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Re: Coolant drain plug on block

PB blaster, blow torch, and a 24" breaker bar

I honestly thought i had broken off the bloody thing in the block, but it came out, just not very willingfully


might try a impact gun if ya have one?
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post #3 of 10 (permalink) Old May 9th, 05, 04:36 AM
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Re: Coolant drain plug on block

Try to find a a big nut and set it on the coolent plug and weld in the center of the nut and that will give you some thing to turn as this has worked for me several times with no problems and if worst comes to worst you may have to go 3/8 pipe plug as thats been done before as well.
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post #4 of 10 (permalink) Old May 9th, 05, 08:31 AM
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Re: Coolant drain plug on block

I ussually use an impact wrench, set to "stun" not "kill" They rattling will break up the rust, but don't apply so much torque that it breaks up the plug.





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post #5 of 10 (permalink) Old May 9th, 05, 08:35 AM Thread Starter
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Re: Coolant drain plug on block

I drilled out the first easy out I broke off using sucessively bigger drill bits. I then heated it up the best I could with a propane torch and let it sit over night with penetrating oil. I then used the next bigger ez-out and snapped that right off.
I am afraid she aint comin' out and if I were to weld on a nut, I put be screwed further if she still doesn't come out and I got that thing weld on there.

One person suggested that I keep drilling out the center of the plug till most of the plug is gone, then tap on the side to get it to collapse on itself.

1973 RS Z28: 401ci Dart Little M, Littlefield 6-71 supercharger @14lbs boost, Callies Magnum crank, Lunati rods, JE pistons, 7.8:1, AFR 227 Comp heads, T&D 1.6 shaft rockers. Reed solid FT cam (240/[email protected]/.542 lift-112 LSA), QFT 750 carbs
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post #6 of 10 (permalink) Old May 9th, 05, 08:53 AM
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Thumbs up Re: Coolant drain plug on block

Quote:
Originally Posted by Tokyo Torquer
One person suggested that I keep drilling out the center of the plug till most of the plug is gone, then tap on the side to get it to collapse on itself.
That will work quite well "Torquer" - I do this all the time trying to get them out of marine/boat engines, they really get stuck in there after a few years of raw water on them...
You can then install a 'drain ****', like the ones used in the bottom of your radiator, to make draining the block much easier in the future.

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post #7 of 10 (permalink) Old May 9th, 05, 09:45 AM
 
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Angry Re: Coolant drain plug on block

Little buggers as well as the oil gallery plugs are bastad's ta get out!!

And I bought two new brass rad. drain petcocks for my BB but the drivers side's "T" handle hit my poly mount AND the pass. side was right behind my oil dip-stick tube so I had to use pipe plugs!!

AND of course, the packaging was toast so there they sit on my bench...

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post #8 of 10 (permalink) Old May 9th, 05, 09:47 AM
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Re: Coolant drain plug on block

You sound bitter pdq lol

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post #9 of 10 (permalink) Old May 9th, 05, 11:41 AM Thread Starter
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Re: Coolant drain plug on block

Vintage 68,
do you mean welding the nut on works good.., or dilling out the center till it collapses?

mike

1973 RS Z28: 401ci Dart Little M, Littlefield 6-71 supercharger @14lbs boost, Callies Magnum crank, Lunati rods, JE pistons, 7.8:1, AFR 227 Comp heads, T&D 1.6 shaft rockers. Reed solid FT cam (240/[email protected]/.542 lift-112 LSA), QFT 750 carbs
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post #10 of 10 (permalink) Old May 9th, 05, 03:20 PM
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Re: Coolant drain plug on block

Quote:
Originally Posted by Tokyo Torquer
Vintage 68,
... dilling out the center till it collapses?

mike
I'm a big fan of working my way out to the threads themselves with a step drill and/or progressively larger drill sizes.

If I was a 'world class' welder (He11 - I'm lucky if the two pieces even stick together - okay, maybe a little better than that...) I would do the 'weld-to-the-nut' trick if I wasn't so successful getting them out other ways - usually. I believe the heat of the welding is what really does the trick here.

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