| Re: [GMCnet] Broken exhaust manifold bolt - final verdict [message #149432] |
Sat, 12 November 2011 03:41  |
Richard Brown
Messages: 281
Registered: May 2009
Karma: 1
|
Senior Member |
|
|
I guess you can get the bolt out once you pull off the manifold, but you could either leave it in place as a guide pin or remove it, clean it up, slot the unthreaded end, and put it back in after chasing the threads in the head & applying anti-seize. The slot is so you can use a screwdriver to remove it if needed. Personally, I'd get it out & replace it.When possible, I don't re-use exhaust manifold bolts. Cheaper in the long run to replace them. I coat the entire bolt from the bottom of the head down with anti-seize. I've seen the bolt rust onto the manifold inside the hole. When it happened, I had the devil's own time getting the manifold off once the bolt head broke off.. Once the manifold came off, the rest of the bolt screwed right out... We were restoring a flathead Ford V-8, so only God knows how long it had been since it had been off.
Richard & Carol Brown
1974 Eleganza SE
"DILLIGAF"
Lindale, Tx. 75771
903-881-0192
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
Richard & Carol Brown
1974 Eleganza SE
1174 Hickory Hills Dr.
Murchison, TX. 75778
|
|
|
|
| Re: [GMCnet] Broken exhaust manifold bolt - final verdict [message #149476 is a reply to message #149432] |
Sat, 12 November 2011 14:57  |
 |
mike miller
Messages: 3576
Registered: February 2004
Location: Hillsboro, Oregon
Karma: 0
|
Senior Member |
|
|
| Richard Brown wrote on Sat, 12 November 2011 01:41 |
... I don't re-use exhaust manifold bolts. Cheaper in the long run to replace them. I coat the entire bolt from the bottom of the head down with anti-seize. ...
|
Just the bolts?
Kelvin coats the whole manifold!
<http://www.gmcmhphotos.com/photos/showphoto.php?photo=11282>
Someday I am going to try it.... maybe on a Onan.
Mike Miller -- Hillsboro, OR -- on the Black list
(#2)`78 23' Birchaven Rear Bath -- (#3)`77 23' Birchaven Side Bath
More Sidekicks than GMC's and a late model Malibu called 'Boo'
http://m000035.blogspot.com
|
|
|
|
|
|
| Re: [GMCnet] Broken exhaust manifold bolt - final verdict [message #149535 is a reply to message #149481] |
Sun, 13 November 2011 03:49 |
|
mike miller
Messages: 3576
Registered: February 2004
Location: Hillsboro, Oregon
Karma: 0
|
Senior Member |
|
|
| Ken Henderson wrote on Sat, 12 November 2011 14:13 |
That's another idea I'd missed! Need to try it with some of the
nickle-based anti-seize (2250*F) my NASCAR engine builder friend gave me.
But maybe that won't cook on?
> Kelvin coats the whole manifold!
>
> <http://www.gmcmhphotos.com/photos/showphoto.php?photo=11282>
>
> Someday I am going to try it.... maybe on a Onan.
|
It is amazing the how easy little almost "off hand" comments are to miss!
I suspect the use of "aluminum based" anti-seize is used in this application due to its lower melting point. (Melting is something you would want to happen if you are going to "aluminimze" the cast iron.) While I haven't checked, I suspect it is little cheaper than the nickel stuff that NASCAR uses. They most likely use nickel for a HIGHER melting point.
I understand Kelvin got this idea from the old Datsun world. It DOES make the manifolds look good!
Mike Miller -- Hillsboro, OR -- on the Black list
(#2)`78 23' Birchaven Rear Bath -- (#3)`77 23' Birchaven Side Bath
More Sidekicks than GMC's and a late model Malibu called 'Boo'
http://m000035.blogspot.com
|
|
|
|
|
|
| Re: [GMCnet] Broken exhaust manifold bolt - final verdict [message #149576 is a reply to message #149476] |
Sun, 13 November 2011 15:10 |
Carl S.
Messages: 4186
Registered: January 2009
Location: Tucson, AZ.
Karma: 13
|
Senior Member |
|
|
| Mike Miller wrote on Sat, 12 November 2011 13:57 |
| Richard Brown wrote on Sat, 12 November 2011 01:41 |
... I don't re-use exhaust manifold bolts. Cheaper in the long run to replace them. I coat the entire bolt from the bottom of the head down with anti-seize. ...
|
Just the bolts?
Kelvin coats the whole manifold!
<http://www.gmcmhphotos.com/photos/showphoto.php?photo=11282>
Someday I am going to try it.... maybe on a Onan.
|
There are views of various parts of my exhaust manifolds in the following album. I spray painted them with VHT header coating and they still look like new three years and 11,000 miles later.
http://www.gmcmhphotos.com/photos/showgallery.php?cat=5504
Carl Stouffer
'75 ex Palm Beach
Tucson, AZ.
Chuck Aulgur Reaction Arm Disc Brakes, Quadrabags, 3.70 LSD final drive, Lenzi knuckles/hubs, Dodge Truck 16" X 8" front wheels, Rear American Eagles, Solar battery charging. GMCSJ and GMCMI member
|
|
|
|
GMCforum
Search
Help
Register
Login
Home
