HELI COIL help !
Le Mans Master
Joined: Jun 2004
Posts: 6,231
Likes: 65
From: Seattle WA
St. Jude Donor '14
The two issues I would see are getting the hole square...and filings 
Not sure what I can offer on getting the hole square...it's going to be tough. I wonder if someone makes a jig that would go across all the intake bolts...?
Filings, I guess just be careful. Rags everywhere and a shop vac running.
Honestly...I think you'll have a hard time It's not that big of a deal to remove the head...
Not sure what I can offer on getting the hole square...it's going to be tough. I wonder if someone makes a jig that would go across all the intake bolts...?
Filings, I guess just be careful. Rags everywhere and a shop vac running.
Honestly...I think you'll have a hard time
It's not that big of a deal to remove the head...
Melting Slicks
Joined: Feb 2006
Posts: 3,428
Likes: 5
From: Japan
To help you drill the hole straight, take a LONG bolt of the same thread pitch and screw it into an adjacent hole. You can use this as a visual alignment guide while drilling. Also, spray some WD40 at the hole while drilling, using slow speed and no more pressure on the drill than absolutely necessary (to prevent the bit from 'grabbing'), and make absolutely sure that ALL the oil drainback holes in the head and valley are covered until the hole has been tapped and the insert installed. Enjoy!
Drifting
Joined: Jul 2008
Posts: 1,873
Likes: 27
From: Sonora CA
If I was going to try this, I would bolt the intake back on, use it as a guide,(when drilling) depending on the size of the drill) Or try to use a 1-2-3 block as a guide, or even make a guide that can be bolted to the head.
Tap the hole as square as possible, clean the new threads with something like Acetone.
When you insert the heli coil use a hi-temp thread locker. Make sure that a vacuum is used when drilling. Good luck
M2C Steve
Tap the hole as square as possible, clean the new threads with something like Acetone.
When you insert the heli coil use a hi-temp thread locker. Make sure that a vacuum is used when drilling. Good luck
M2C Steve
Race Director
Joined: Mar 2006
Posts: 14,112
Likes: 28
From: Florida
If I was going to try this, I would bolt the intake back on, use it as a guide,(when drilling) depending on the size of the drill) Or try to use a 1-2-3 block as a guide, or even make a guide that can be bolted to the head.
Tap the hole as square as possible, clean the new threads with something like Acetone.
When you insert the heli coil use a hi-temp thread locker. Make sure that a vacuum is used when drilling. Good luck
M2C Steve
Tap the hole as square as possible, clean the new threads with something like Acetone.
When you insert the heli coil use a hi-temp thread locker. Make sure that a vacuum is used when drilling. Good luck
M2C Steve
Best if the little plate was 1" thick or so.
Drifting
Joined: Jun 2010
Posts: 1,781
Likes: 15
From: Oxford Ohio
Drill a hole through a piece of wood that it true on both sides Lay it on the intake suface and use it as a guide. You could make it from a 1 inch piece of steel if you wanted to do more work. Drill the hole in the wood/steel on a drill press if you feel you can't drill it at a right angle. Plug all the oil return holes with something, and place several magnets around the area you are working on. Rare earth magnets work well. I use them on the bottom of my oil filters also.
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Instructor
Joined: Sep 2011
Posts: 164
Likes: 0
From: Columbia South Carolina
try coating the drill and tap with heavy grease when you do the new hole that heavy grease will hold on to the chips and bits of metal coming out. you still need to cover holes but the grease trick will cut loose metal by a good bit.
Instructor
Joined: Sep 2011
Posts: 164
Likes: 0
From: Columbia South Carolina
you need to buy a t-handle made for holding a tap sears has them for less than 20 dollars. you're pretty much guaranteed that you'll send the tap in crooked without using a handle made to be used with a tap.