# Hole in my head gasget

**URL:** <https://community.cartalk.com/t/hole-in-my-head-gasget/31531>\
**Category:** Maintenance/Repairs\
**Tags:** engines\
**Created:** [June 7, 2009, 1:51pm UTC](https://community.cartalk.com/t/hole-in-my-head-gasget/31531 "2009-06-07T13:51:59Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![RustyCan](https://avatars.discourse-cdn.com/v4/letter/r/bc8723/32.png) [@RustyCan](https://community.cartalk.com/u/RustyCan)\
**Post date:** [June 7, 2009, 1:51pm UTC](https://community.cartalk.com/t/hole-in-my-head-gasget/31531/1 "2009-06-07T13:51:59Z")

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I have a 1992 Chevy S 10 Pickup V6. We drill a 3/8 inch hole through the firewall, and into the engine block. Punctured the coolant cavity in the block. We drilled the hole out to 7/8 inch and plug it with a rubber expansion stopper like gasket and gasket sealant but I’m not sure that will hold. Can we cut a larger hole in the fire wall big enough to spot welled the 7/8 hole in the engine block then weld a cover on the fire wall?

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**Author:** ![hellokit](https://avatars.discourse-cdn.com/v4/letter/h/6a8cbe/32.png) [@hellokit](https://community.cartalk.com/u/hellokit)\
**Post date:** [June 7, 2009, 2:17pm UTC](https://community.cartalk.com/t/hole-in-my-head-gasget/31531/2 "2009-06-07T14:17:52Z")

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Maybe. I would go to Ace Hardware and get one of those metal plugs that you screw in, using a hex wrench, and a tap to form the threads.

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**Author:** ![oldschool](https://avatars.discourse-cdn.com/v4/letter/o/e19adc/32.png) [@oldschool](https://community.cartalk.com/u/oldschool)\
**Post date:** [June 7, 2009, 4:37pm UTC](https://community.cartalk.com/t/hole-in-my-head-gasget/31531/3 "2009-06-07T16:37:26Z")

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Is this something like a science project? I certanily can’t speak from experience in this area. Perhaps I am judging to fast,was this a attempt to clean out the water jackets of the engine or some other cleaning out work? I have seen that DexCool (but it was later than 92) get stubborn to get out (used chemicals and flushing techniques) but accidently drilling a hole in the engine, I have never been there.