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05-11-2005, 10:50 AM
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CC Member
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Join Date: Apr 2004
Location: Clayton,
NJ
Cobra Make, Engine: (building) - Hunter #74 w/ 302 small block (320hp under the hood). . . how many wires are there in a wiring harness?
Posts: 154
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Not Ranked
Head Bolt Torque
Putting the 302ci back together, so I need to know.......
Need the correct torque for the upper and lower (the same?) headbolts?
Also, do they need to be step up in torqueing, start at 60lbs and then another round to 70lbs?
They are iron heads, believe they are '87, and the block is a '74....
Much appreciate the help...... 
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I'm not busy because I did it right the third time . . .I think!
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05-11-2005, 04:04 PM
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Senior Club Cobra Member
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Join Date: Jul 2000
Location: Chilliwack,BC,
BC
Cobra Make, Engine: F5 Roadster
Posts: 1,422
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Not Ranked
sequence
Hi,
Normally you would torque the bolts in 3 steps.
30 ft/lbs
50 ft/lbs
70 ft/lbs
start in the middle and work out in a circle, all bolts the same torque.Put a dab of oil on the threads and under the bolt head so there is no friction.
Perry.  |
05-11-2005, 06:13 PM
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CC Member
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Join Date: May 2001
Location: California,
Ca
Cobra Make, Engine: NAF 289 Slabside Early Comp Car with 289 Webers and all the goodies. Cancelling the efforts of several Priuses
Posts: 6,592
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Not Ranked
High Plains Drifter is correct, 3 step torquing is a good idea. It helps pull the head down evenly, but I would add one additional step. Some of the gasket makers reccomend torquing the top row of bolts to 80#. This combats the tendancy of the head lifting as the intake manifold is tightened down. Good fasteners, clean, flat surfaces, good gaskets and you shouldn't have any difficulties. Be sure to use thread sealer on the bottom studs/bolts where they screw into the block as they must seal the cooling system too.
Rick
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Rick
As you slide down the Banister of Life, may the splinters never be pointing the wrong way
Last edited by Rick Parker; 05-14-2005 at 10:10 AM..
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05-11-2005, 06:25 PM
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Club Cobra Member
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Join Date: Mar 2000
Location: Chino Hills,
CA
Cobra Make, Engine: B&B 408W, TKO 600, 9" 4-link Truetrac, 13" X 1 3/8" curved vane frt disks
Posts: 205
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Not Ranked
Should we re-torque after some initial mileage?
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05-11-2005, 07:00 PM
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CC Member
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Join Date: May 2001
Location: California,
Ca
Cobra Make, Engine: NAF 289 Slabside Early Comp Car with 289 Webers and all the goodies. Cancelling the efforts of several Priuses
Posts: 6,592
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Not Ranked
Regarding Re- torque
Some head gaskets require retorquing others do not. I depends on materials they are made of. Usually they will include instructions to do so if required.
Rick
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Rick
As you slide down the Banister of Life, may the splinters never be pointing the wrong way
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05-12-2005, 08:25 AM
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CC Member
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Join Date: Apr 2004
Location: Clayton,
NJ
Cobra Make, Engine: (building) - Hunter #74 w/ 302 small block (320hp under the hood). . . how many wires are there in a wiring harness?
Posts: 154
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Not Ranked
Also need to know the correct torque for the rocker arms?
__________________
I'm not busy because I did it right the third time . . .I think!
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05-12-2005, 11:29 AM
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Member of the north
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Join Date: May 2003
Cobra Make, Engine: A Cobra
Posts: 11,207
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Not Ranked
I use 80 pounds bolts and 90 pounds ( with lube ) on studs.
Check with ARP and their App chart.
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I'm a writer, feed the artist and buy a book.
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05-13-2005, 06:35 AM
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CC Member
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Join Date: Feb 2004
Location: Kenyon,
MN
Cobra Make, Engine: RCR GT40 #45
Posts: 245
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Not Ranked
Quote:
Originally posted by trularin
I use 80 pounds bolts and 90 pounds ( with lube ) on studs.
Check with ARP and their App chart.
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On head bolts (we use ARP) I use teflon thread seal on all bolts (even the ones going into blind holes) to maintain consistency in torque effort. We do it in 3 steps and take the top bolts to 80 and the bottoms to 70. Since doing this method, I've yet to have had a problem with a blown headgasket (which 302's are famous for)..
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Regards - Randy
RCR40 #45 http://www.GT-Forty.com
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05-13-2005, 08:44 AM
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Member of the north
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Join Date: May 2003
Cobra Make, Engine: A Cobra
Posts: 11,207
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Not Ranked
I like the teflon over the "white paste" for the sealer.
I have not had a blown head gasket either, but I also spray the gasket with high tack ( I probably spelled that wrong ). I think it has a copper compound in it.
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I'm a writer, feed the artist and buy a book.
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05-14-2005, 01:22 AM
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Senior Club Cobra Member
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Join Date: Jul 2001
Location: Evans,
CO
Cobra Make, Engine: NAF 289 FIA, 347 stroker with Weber 48's, building a '48 Anglia gasser, driving a '55 Chevy resto-rod
Posts: 3,119
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Not Ranked
Fel-Pro says use no sealant on head gaskets? Even has it stamped on the gasket.
This will be my first time using Fel-Pro and I was always under the impression you needed to use a gasket sealer on head gaskets. Also the say don't re-torque?
Any insights or help?
trularin, like in white teflon tape?
I'm a FNG when it comes to this stuff.
__________________
"Breathe in... Breathe out... then move on with life. Lifes too short to sweat the small stuff"
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05-14-2005, 10:08 AM
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CC Member
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Join Date: May 2001
Location: California,
Ca
Cobra Make, Engine: NAF 289 Slabside Early Comp Car with 289 Webers and all the goodies. Cancelling the efforts of several Priuses
Posts: 6,592
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Not Ranked
GR:
Do just what it says. Are you using 1011-1 or 1011-2?
Be sure to read the stamped impression "This end forward". You will have to install one gasket upside down to get the stamping to the front of the block on one bank of cylinders, this is how the circulation is achieved throughout the block. Good product+ good fasteners+ proper torque procedure=no problems!
Rick
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Rick
As you slide down the Banister of Life, may the splinters never be pointing the wrong way
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05-14-2005, 10:23 AM
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CC Member
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Join Date: May 2001
Location: California,
Ca
Cobra Make, Engine: NAF 289 Slabside Early Comp Car with 289 Webers and all the goodies. Cancelling the efforts of several Priuses
Posts: 6,592
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Not Ranked
GR you have mail.
Rick
__________________
Rick
As you slide down the Banister of Life, may the splinters never be pointing the wrong way
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05-14-2005, 04:12 PM
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Member of the north
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Join Date: May 2003
Cobra Make, Engine: A Cobra
Posts: 11,207
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Not Ranked
Liquid teflon, ARP and GM make the best stuff I have used.
I like to seat the studs using the dual nut method and then coat the top threads with ARP assembly lube for threads.
Three step torques. The last one should be your final, 80 or 90. Make sure your washers are coated as well.
Wish I knew ahead of time, I'd send you a tube of teflon.
P.S. I have never had a problem spraying the head gaskets, but you need to decide.
__________________
I'm a writer, feed the artist and buy a book.
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05-14-2005, 04:14 PM
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Member of the north
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Join Date: May 2003
Cobra Make, Engine: A Cobra
Posts: 11,207
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Not Ranked
Oh crap, make sure you follow the tightening order!
Rick, do you know the order for Gary?
__________________
I'm a writer, feed the artist and buy a book.
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05-14-2005, 07:03 PM
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CC Member
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Join Date: May 2001
Location: California,
Ca
Cobra Make, Engine: NAF 289 Slabside Early Comp Car with 289 Webers and all the goodies. Cancelling the efforts of several Priuses
Posts: 6,592
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Not Ranked
This site has the sequence.........scroll down
Rick
http://www.worldcastings.com/tech/WindsorJrTech.pdf
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Rick
As you slide down the Banister of Life, may the splinters never be pointing the wrong way
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05-14-2005, 08:23 PM
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Senior Club Cobra Member
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Join Date: Jul 2001
Location: Evans,
CO
Cobra Make, Engine: NAF 289 FIA, 347 stroker with Weber 48's, building a '48 Anglia gasser, driving a '55 Chevy resto-rod
Posts: 3,119
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Not Ranked
Rick, if you sent the e-mail thru CC I never recieved it. Try here: hc38t@msn.com.
Trularin, I know the head tightening sequence on the sb, but thanks for your concern. Liquid teflon? ARP or GM any part numbers? Where I live the nearest and best speed shop is 60 miles away, a good 3-4 hr RT depending on traffic. There is a GM dealer about 20 minutes away though.
I had a valve retainer fail and bent the intake valve on #3. pulled the top end last weekend. Today we pulled the engine. Tore it down, thankfully there was no damage to the lower end. We are going to replace the #3 rod bearings. Install a new cam, new aluminum heads, Edlebrock RPM Performers, timing chain. I'm not after super hipo and I know there are other heads and cams out there but for the $ this works for me.
I'm going to be using the 1011-2 gaskets, recommended by Edlebrock tech support.
Thanks
__________________
"Breathe in... Breathe out... then move on with life. Lifes too short to sweat the small stuff"
Last edited by G.R.; 05-14-2005 at 08:28 PM..
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05-14-2005, 08:30 PM
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Senior Club Cobra Member
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Join Date: Jul 2001
Location: Evans,
CO
Cobra Make, Engine: NAF 289 FIA, 347 stroker with Weber 48's, building a '48 Anglia gasser, driving a '55 Chevy resto-rod
Posts: 3,119
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Not Ranked
S Beaudry, sorry I hi-jacked your thread 
__________________
"Breathe in... Breathe out... then move on with life. Lifes too short to sweat the small stuff"
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