Exhaust head studs replacement

[1-2clutch-u]

Hi all, My Exhaust manifold Head studs pulled out and the threads were garbage. I know this has happens to a few people. When I did the head gasket about 3 months ago I chased the threads good but as you know they did not hold up. The common thing is to go with a bigger size and that's what I wanted to do. I found the 7/16 kit from a sm. vendor. But I wanted to get It done asap and not pay $90 for a kit that cost far less. (not knocking anybody for the hustle) Below I have pics, part #'s and prices and even a vid.
Helicoil kit with tap and tool and 6 coils # BK 7703047 from napa $20
29/64th drill bit. I got mine in a kit from home depot for $30 (returned the kit later on) :naughty: you can get one online for $6-$10.
Studs from ace hardware (its like a home depot or lowes but has great selection of nuts and bolts) $7 bec I went with bolts not studs. studs were not too much more but sizing gets kinda iffy as they were too long for how I wanted it.
The important thing is that you have tap holders and a drill and some cutting oil or lube. I had all the things here so I didnt want to buy the full kit the vendor offers.
A 90 DEG DRILL MAKES THIS SOOO EZ. A typical drill is OK for most of the holes but at times it can get a bit tight for space and hard to get center on the hole. I Had one. dewalt was cheep last year for black fri sale at lowes.
If you have any questions pm or email me. I haven't started my car yet as I'm doing some vac hose work too, but with in the next day I will have ran it. Hope for no leaks right!!!
Now for the pics
This is what my gasket looked like

This is one of my old studs that backed off.

Drill bit

The tap. I marked it black so I knew were to stop taping. you Can feel it DONT FORCE IT!!!

Helicoil kit 7/16-14 that's a coarse thread.

Part#

Helicoil inserts

Make sure you break the tang off once its in all the way.

The insert tool.

What it should look like...when done right.

The vid.

 

[1-2clutch-u]

lotta good info. tech section?

 

[NashMan]

I just heilcoil the stock studs, but I have done this to my friends head. I find it pretty over kill and not needed


a simple yet easy way to drill the holes is with and air ratchet just find skocket that fit's the drill bit center then weld said bit to socket then bingo side ways drill

 

[destrux]

There's a reason they use studs and not bolts. Bolts will loosen up. Better drill those bolt heads and safety wire them if you don't want that to happen.

 

[jetjock]

lotta good info. tech section?

I hope not. I know you meant well though.

 

[te72]

lotta good info. tech section?

I don't think we have a tech section for this sort of thing, but if the mods see fit, they could sticky it. You could always link it in your signature with a short description of what the thread contains.

Feel like I was being dragged around by my feet in the video.

There's a reason they use studs and not bolts. Bolts will loosen up. Better drill those bolt heads and safety wire them if you don't want that to happen.

I know it gets hot and all, but would Loctite red (#284? I forget) keep them from backing out?