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E46 M3 (2001-2006) Engine: S54 - Max Hp: 333 hp at 7,900 rpm / 262 lb/ft at 4,900 rpm
Total Produced: 45,000+ - Years Produced: 2001 to 2006.


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Old Fri, Jul-06-2018, 06:41:50 AM   #1
Exclusivs
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Default Coolant Drain Plug Block Removal Troubles :

Midway through system flush / and block drain plug given tough time. Anyone else experience this? Have 6” extension on it now but as you know little room to work with. Do not want to force.

TIA!


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Old Fri, Jul-06-2018, 07:17:54 AM   #2
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Default Re: Coolant Drain Plug Block Removal Troubles :

As long as you have proper size socket on it, use a breaker bar from the bottom. Mine was crusted on there a bit too. You can try to spray with wd40 or pblaster to soak for a bit. That area gets hot from headers, so it could be a bit tough to get out.
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Originally Posted by Exclusivs View Post
Midway through system flush / and block drain plug given tough time. Anyone else experience this? Have 6” extension on it now but as you know little room to work with. Do not want to force.

TIA!


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Old Fri, Jul-06-2018, 07:24:28 AM   #3
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Default Re: Coolant Drain Plug Block Removal Troubles :

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Originally Posted by mrgizmo04 View Post
As long as you have proper size socket on it, use a breaker bar from the bottom. Mine was crusted on there a bit too. You can try to spray with wd40 or pblaster to soak for a bit. That area gets hot from headers, so it could be a bit tough to get out.

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Thanks for confirming, absolutely accurate. No room in there either to even give quick shock to head of ratchet. Leverage is the enemy right now. Will hit it with PB and grab a 1/2” ratchet tomorrow if I can. I’d use my breaker bar but don’t have 1/2” to 3/8 adapter. Plus not sure how various ext and adapters play in effectiveness of bolt removal. Appreciate your response.


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Old Fri, Jul-06-2018, 07:32:02 AM   #4
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Default Re: Coolant Drain Plug Block Removal Troubles :

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Originally Posted by Exclusivs View Post
. Plus not sure how various ext and adapters play in effectiveness of bolt removal.
The fewer, the better. Tloser to 90 degrees from bolt/nut, the better. Pb blaster will help. You can swing a hammer/mallet at the end of the breaker or socket handle to shock it loose a bit.
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Old Fri, Jul-06-2018, 08:02:41 AM   #5
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Default Re: Coolant Drain Plug Block Removal Troubles :

Hit it with PB - will again tomorrow after I’m able to get a larger 1/2” ratchet. FYI ; have not move the Accumulator canister from its place. Don’t see need to as drain plug bolt is accessible. Does require a 6” extension on ratchet head to clear if it. Am sure my problem is coming from what Giz hit on - in combination with lack of leverage from 3/8” ratchet.


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Old Fri, Jul-06-2018, 03:14:36 PM   #6
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Default Re: Coolant Drain Plug Block Removal Troubles :

Its a bit overkill. Dont make your life harder than it has to be. Drain the radiator and you'll be fine. Or if youre that ocd run it and drain it again.
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Old Fri, Jul-06-2018, 05:37:27 PM   #7
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Default Re: Coolant Drain Plug Block Removal Troubles :

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Its a bit overkill. Dont make your life harder than it has to be. Drain the radiator and you'll be fine. Or if youre that ocd run it and drain it again.


Rad is drained off the car and new one on. Water pump & thermostat after. If refreshing entirely - why not get all old fluid out possible?


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Old Fri, Jul-06-2018, 07:44:52 PM   #8
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Default Re: Coolant Drain Plug Block Removal Troubles :

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Originally Posted by Exclusivs View Post
Rad is drained off the car and new one on. Water pump & thermostat after. If refreshing entirely - why not get all old fluid out possible?


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Def good to get the block flushed out.

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Old Fri, Jul-06-2018, 09:20:36 PM   #9
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Default Re: Coolant Drain Plug Block Removal Troubles :

Im in Texas and we don't have corrosion issues like northern cars, but down here they always "stick." I take a 13mm swivel socket on a 2 or 3' extension and bust it loose, usually requiring quite a bit of wind up on the long extension. Once it cracks loose it'll soon out by hand. Just my experience.
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Old Fri, Jul-06-2018, 11:42:15 PM   #10
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Default Re: Coolant Drain Plug Block Removal Troubles :

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Im in Texas and we don't have corrosion issues like northern cars, but down here they always "stick." I take a 13mm swivel socket on a 2 or 3' extension and bust it loose, usually requiring quite a bit of wind up on the long extension. Once it cracks loose it'll soon out by hand. Just my experience.


West Coast, and west coast based car - not a corrosion issue here per say more awkward no space and by feel. Swivel is possibly best option with bolt sitting slightly below the accumulator. Unfortunately in such tight space & working on your back no real such thing as “wind up” lol.




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Discussing Coolant Drain Plug Block Removal Troubles : in the E46 M3 (2001-2006) Forum - Engine: S54 - Max Hp: 333 hp at 7,900 rpm / 262 lb/ft at 4,900 rpm
Total Produced: 45,000+ - Years Produced: 2001 to 2006. at BMW M3 Forum.com (E30 M3 | E36 M3 | E46 M3 | E92 M3 | F80/X)