Home » Public Forums » GMCnet » [GMCnet] Torque for exhaust manifold with copper gasket.
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| Re: [GMCnet] Torque for exhaust manifold with copper gasket. [message #262400 is a reply to message #262357] |
Sat, 20 September 2014 16:33   |
Carl S.
Messages: 4186
Registered: January 2009
Location: Tucson, AZ.
Karma: 13
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BobDunahugh wrote on Fri, 19 September 2014 23:09Put the flat side of the gasket toward the resurfaced side of the manifold. Seems right. Now the torque number.Thanks
Bob Dunahugh Going to Wisconsin Wed.
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Bob,
I didn't see anything on Erf's site about Manifolds, only headers, so I looked through my old sets of instructions on various components I have installed. Dave Lenzi's instructions very specifically say to evenly torque the bolts in five pound increments, to 25 ft lbs. Start with the center bolts then the ends with the one at the top last.
" Start by hanging the manifold/gasket from the top bolt (#5). This hole is smaller than the other four holes in the manifold and is used for alignment.
Install the remaining four bolts. Torque bolts evenly to compress the emboss. Start with bolts #1 through #4, which are in line, before tightening the top bolt as shown in the chart below. This is very important because all five bolts are above the center line of the manifold, and torquing #5 first will tip the manifold and over compress the emboss at the top.
#5 *
3 * 1 * 2 * 4*
Do Not torque the full 25 foot-pounds on the first pass. Take five passes at five-pounds per pass
Bring the engine up to full operating temperature, then turn off and let cool to ambient temperature.
Re-torque the bolts in sequence to 25 foot-pounds. This heating/cooling-torquing may have to be repeated several times until the torque remains at 25-foot pounds."
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
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| Re: [GMCnet] Torque for exhaust manifold with copper gasket. [message #262401 is a reply to message #262400] |
Sat, 20 September 2014 16:35 |
Carl S.
Messages: 4186
Registered: January 2009
Location: Tucson, AZ.
Karma: 13
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Senior Member |
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Carl S. wrote on Sat, 20 September 2014 14:33BobDunahugh wrote on Fri, 19 September 2014 23:09Put the flat side of the gasket toward the resurfaced side of the manifold. Seems right. Now the torque number.Thanks
Bob Dunahugh Going to Wisconsin Wed.
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Bob,
I didn't see anything on Erf's site about Manifolds, only headers, so I looked through my old sets of instructions on various components I have installed. Dave Lenzi's instructions very specifically say to evenly torque the bolts in five pound increments, to 25 ft lbs. Start with the center bolts then the ends with the one at the top last.
" Start by hanging the manifold/gasket from the top bolt (#5). This hole is smaller than the other four holes in the manifold and is used for alignment.
Install the remaining four bolts. Torque bolts evenly to compress the emboss. Start with bolts #1 through #4, which are in line, before tightening the top bolt as shown in the chart below. This is very important because all five bolts are above the center line of the manifold, and torquing #5 first will tip the manifold and over compress the emboss at the top.
#5 *
3 * 1 * 2 * 4*
Do Not torque the full 25 foot-pounds on the first pass. Take five passes at five-pounds per pass
Bring the engine up to full operating temperature, then turn off and let cool to ambient temperature.
Re-torque the bolts in sequence to 25 foot-pounds. This heating/cooling-torquing may have to be repeated several times until the torque remains at 25-foot pounds."
The chart didn't post the way I typed it, but you get the idea. If you need more info, I can scan Dave's instruction sheet and post it to the photo site.
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
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| Re: [GMCnet] Torque for exhaust manifold with copper gasket. [message #262406 is a reply to message #262401] |
Sat, 20 September 2014 17:05 |
Mr ERFisher
Messages: 7117
Registered: August 2005
Karma: 2
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Senior Member |
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On Saturday, September 20, 2014, Carl Stouffer wrote:
> Carl S. wrote on Sat, 20 September 2014 14:33
>> BobDunahugh wrote on Fri, 19 September 2014 23:09
>>> Put the flat side of the gasket toward the resurfaced side of the
> manifold. Seems right. Now the torque number.Thanks
>>> Bob Dunahugh Going to Wisconsin Wed.
>>> _______________________________________________
>>> GMCnet mailing list
>>> Unsubscribe or Change List Options:
>>> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
>>
>>
>>
>> Bob,
>>
>> I didn't see anything on Erf's site about Manifolds, only headers, so I
> looked through my old sets of instructions on various components I have
>> installed. Dave Lenzi's instructions very specifically say to evenly
> torque the bolts in five pound increments, to 25 ft lbs. Start with the
>> center bolts then the ends with the one at the top last.
>>
>> " Start by hanging the manifold/gasket from the top bolt (#5). This
> hole is smaller than the other four holes in the manifold and is used for
>> alignment.
>>
>> Install the remaining four bolts. Torque bolts evenly to compress the
> emboss. Start with bolts #1 through #4, which are in line, before
>> tightening the top bolt as shown in the chart below. This is very
> important because all five bolts are above the center line of the manifold,
> and
>> torquing #5 first will tip the manifold and over compress the emboss at
> the top.
>>
>> #5 *
>> 3 * 1 * 2 * 4*
>>
>> Do Not torque the full 25 foot-pounds on the first pass. Take five
> passes at five-pounds per pass
>>
>> Bring the engine up to full operating temperature, then turn off and let
> cool to ambient temperature.
>>
>> Re-torque the bolts in sequence to 25 foot-pounds. This
> heating/cooling-torquing may have to be repeated several times until the
> torque remains
>> at 25-foot pounds."
>
>
> The chart didn't post the way I typed it, but you get the idea. If you
> need more info, I can scan Dave's instruction sheet and post it to the photo
That would be good.
Erf
> site.
>
> --
> Carl Stouffer
> '75 ex Palm Beach
> Tucson, AZ.
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
>
--
Gene Fisher -- 74-23,77PB/ore/ca
“Give a man a fish; you have fed him for today --- give him a URL and
-------
http://gmcmotorhome.info/
Alternator Protection Cable
http://gmcmotorhome.info/APC.html
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| Re: [GMCnet] Torque for exhaust manifold with copper gasket. [message #262414 is a reply to message #262400] |
Sat, 20 September 2014 18:19 |
Mr ERFisher
Messages: 7117
Registered: August 2005
Karma: 2
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Senior Member |
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On Sat, Sep 20, 2014 at 2:33 PM, Carl Stouffer wrote:
> BobDunahugh wrote on Fri, 19 September 2014 23:09
>> Put the flat side of the gasket toward the resurfaced side of the
> manifold. Seems right. Now the torque number.Thanks
>> Bob Dunahugh Going to Wisconsin Wed.
>> _______________________________________________
>> GMCnet mailing list
>> Unsubscribe or Change List Options:
>> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
>
>
>
> Bob,
>
> I didn't see anything on Erf's site about Manifolds,
argggg - bad link
read here
http://gmcmotorhome.info/radiator.html#block
more work for tonight
erf
> only headers, so I looked through my old sets of instructions on various
> components I have
> installed. Dave Lenzi's instructions very specifically say to evenly
> torque the bolts in five pound increments, to 25 ft lbs. Start with the
> center
> bolts then the ends with the one at the top last.
>
> " Start by hanging the manifold/gasket from the top bolt (#5). This hole
> is smaller than the other four holes in the manifold and is used for
> alignment.
>
> Install the remaining four bolts. Torque bolts evenly to compress the
> emboss. Start with bolts #1 through #4, which are in line, before
> tightening
> the top bolt as shown in the chart below. This is very important because
> all five bolts are above the center line of the manifold, and torquing #5
> first will tip the manifold and over compress the emboss at the top.
>
> #5 *
> 3 * 1 * 2 * 4*
>
> Do Not torque the full 25 foot-pounds on the first pass. Take five passes
> at five-pounds per pass
>
> Bring the engine up to full operating temperature, then turn off and let
> cool to ambient temperature.
>
> Re-torque the bolts in sequence to 25 foot-pounds. This
> heating/cooling-torquing may have to be repeated several times until the
> torque remains at
> 25-foot pounds."
> --
> Carl Stouffer
> '75 ex Palm Beach
> Tucson, AZ.
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
>
--
Gene Fisher -- 74-23,77PB/ore/ca
“Give a man a fish; you have fed him for today --- give him a URL and
-------
http://gmcmotorhome.info/
Alternator Protection Cable
http://gmcmotorhome.info/APC.html
_______________________________________________
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| Re: [GMCnet] Torque for exhaust manifold with copper gasket. [message #262416 is a reply to message #262414] |
Sat, 20 September 2014 18:49 |
Carl S.
Messages: 4186
Registered: January 2009
Location: Tucson, AZ.
Karma: 13
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Senior Member |
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Mr ERFisher wrote on Sat, 20 September 2014 16:19On Sat, Sep 20, 2014 at 2:33 PM, Carl Stouffer wrote:
> BobDunahugh wrote on Fri, 19 September 2014 23:09
>> Put the flat side of the gasket toward the resurfaced side of the
> manifold. Seems right. Now the torque number.Thanks
>> Bob Dunahugh Going to Wisconsin Wed.
>> _______________________________________________
>> GMCnet mailing list
>> Unsubscribe or Change List Options:
>> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
>
>
>
> Bob,
>
> I didn't see anything on Erf's site about Manifolds,
argggg - bad link
read here
http://gmcmotorhome.info/radiator.html#block
more work for tonight
erf
> only headers, so I looked through my old sets of instructions on various
> components I have
> installed. Dave Lenzi's instructions very specifically say to evenly
> torque the bolts in five pound increments, to 25 ft lbs. Start with the
> center
> bolts then the ends with the one at the top last.
>
> " Start by hanging the manifold/gasket from the top bolt (#5). This hole
> is smaller than the other four holes in the manifold and is used for
> alignment.
>
> Install the remaining four bolts. Torque bolts evenly to compress the
> emboss. Start with bolts #1 through #4, which are in line, before
> tightening
> the top bolt as shown in the chart below. This is very important because
> all five bolts are above the center line of the manifold, and torquing #5
> first will tip the manifold and over compress the emboss at the top.
>
> #5 *
> 3 * 1 * 2 * 4*
>
> Do Not torque the full 25 foot-pounds on the first pass. Take five passes
> at five-pounds per pass
>
> Bring the engine up to full operating temperature, then turn off and let
> cool to ambient temperature.
>
> Re-torque the bolts in sequence to 25 foot-pounds. This
> heating/cooling-torquing may have to be repeated several times until the
> torque remains at
> 25-foot pounds."
> --
> Carl Stouffer
> '75 ex Palm Beach
> Tucson, AZ.
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
>
--
Gene Fisher -- 74-23,77PB/ore/ca
"Give a man a fish; you have fed him for today --- give him a URL and
-------
http://gmcmotorhome.info/
Alternator Protection Cable
http://gmcmotorhome.info/APC.html
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
More specifically, exhaust manifolds.
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
|
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| Re: [GMCnet] FW: Torque for exhaust manifold with copper gasket. [message #262425 is a reply to message #262423] |
Sat, 20 September 2014 21:00 |
Carl S.
Messages: 4186
Registered: January 2009
Location: Tucson, AZ.
Karma: 13
|
Senior Member |
|
|
You're welcome Bob. I'll get a scanned copy of Dave Lenzi's instructions on the photo site ASAP.
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
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