1978 Corvette drilling into Intake
Drifting
Joined: Jul 2004
Posts: 1,695
Likes: 65
From: Kissimmee fl
Finalist 2021 C3 of the Year - Modified
2017 C3 of Year Finalist
Cruise-In VIII Veteran
St. Jude Donor '07
If you are talking about the thermostat housing bolt in your other post, You can drill thru if you need to. Both bolts go into the water passage. Drain down the water level, put a rag in the hole to catch the shavings. you may not need to go all of the way thru. If you do go thru, I would suggest using a stud and locktite to seal it in place and a hut to hold everything together, Unless you are going for the stock look. 
Melting Slicks
Joined: Mar 2006
Posts: 3,456
Likes: 102
From: Piedmont Va
St. Jude Donor '11-'12-'13,'19-'20
If you have a shopvac with a decent attachment run it while your drilling and suck up the shavings real time. Thats how I like to do these tyes of tings, dont give them a chance to get anywhere else!
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer
Brett Foote
10 Things Every Corvette Owner Needs (2026 Edition)
Michael S. Palmer
8 Most "Only Corvette Owners Understand" Quirks and Problems
Pouria Savadkouei
10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years
Joe Kucinski
How Much Horsepower Every Corvette Engine "LOST" in 1972
Joe Kucinski
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!
Michael S. Palmer
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!
Joe Kucinski
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter
Joe Kucinski
8 Coolest Corvette Pace Cars (and Replicas) of All Time
Verdad Gallardo
Thread Starter
Acct suspended by request 19 April 2011
Joined: Jul 2009
Posts: 478
Likes: 0
From: La Porte In
Thanks
Le Mans Master
Joined: Dec 2007
Posts: 6,422
Likes: 591
From: McHenry Illinois
If you measure the hole depth where the other thermostat housing bolt is, then you can put some electrical tape on the drill bit at the max depth you want to drill. then no worries about drilling too deep.
Drifting
Joined: Jul 2007
Posts: 1,889
Likes: 23
From: Kansas
Yes Sir; I have had to drill out a lot of bolts thru the years. I use a reverse drill bit, put the drill in reverse, and 9 chances out of ten, the broken bolt comes out without even going very deep. Have a great 4th Gene
Pro
Joined: Sep 2002
Posts: 624
Likes: 1
From: Melbourne, Fla. 6 months- New Middletown, Ohio 6 months
Might add they are also called left hand bits. Since this bolt would not be bottomed out I agree with doctorgene, odds are the broken stud will back right out. Just be sure that you center punch the broken bolt in the center so that the drill bit is not drilling into any part of the intake manifold. Good luck!
Le Mans Master
Joined: Nov 2008
Posts: 5,691
Likes: 12
From: columbus oh
Safety Car
Joined: Oct 2007
Posts: 3,729
Likes: 267
From: Austin Texas
Corvette of the Year Winner 2017
2016 C3 of Year Finalist
if your real lucky , you can use a dremel and cut a slot across the top of the bolt.
then use a a small standard screwdriver and unscrew the bolt.
If that fails move on to the easyouts, or reverse drills.
69Vett
then use a a small standard screwdriver and unscrew the bolt.
If that fails move on to the easyouts, or reverse drills.
69Vett