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Old 08-24-2019, 12:45 PM
Registered User
Join Date: Feb 2019
Posts: 207
Air hammer on a while also hammer while turning.
If bound with lock tight,heat well let cool, heat again let cool usually comes
out easy.
Heat bolt head near red hot wait for heat to travel,heat again wait,now cool
bolt quickly (wet rag) bolt shrinks,housings still expanded.
Some times nothing works!

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Old 09-03-2019, 10:13 PM
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Join Date: Dec 2009
Posts: 86
THank you all for weighing in -- much appreciated!!
1980 300TD
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Old 09-03-2019, 10:22 PM
ROLLGUY's Avatar
Join Date: Oct 2007
Posts: 6,984
Of course if you DO end up breaking bolts off in your water pump housing, do this:
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Old 09-04-2019, 09:17 PM
okyoureabeast's Avatar
Rogue T Tolerant
Join Date: Jul 2009
Location: North America
Posts: 1,675
When you do get them off, do the needful and get brand new bolts on so the next guy doesn't cry at snapping them!
-Typos courtesy of my mobile phone.
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Old 09-05-2019, 07:52 AM
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Join Date: Mar 2008
Location: CT
Posts: 275
I start with applying Kroil or PB Blaster days ahead of intended project removal. A quick squirt before work, another when I get home. It has served me well.
When a bolt or stud does snap, a center punch and left handed drill bits are my go to.
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Old 09-05-2019, 10:56 AM
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Join Date: Oct 2007
Posts: 6,984
Keep in mind that these bolts being M6 are very small, and without some kind of guide, it is near impossible to drill in the center of the bolt. Even more impossible with the housing still mounted on the engine!
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Old 09-06-2019, 02:28 PM
I told you so!
Join Date: Jun 2002
Location: Motor City, MI
Posts: 2,848
I've successfully used heat, followed by candle wax to penetrate and lubricate the threads.

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