Hey Pantera Guru's, I finally got to my Pantera last night. (work is getting in the way of my fun!!) Simple fix. ALL my valve cover bolts were loose. Every one of them. I tightened them all but didn't want to over tighten them. Anyone know what the correct torque should be? I have roller rockers and the taller Ford Racing valve covers for clearance. Your thoughts? Terry
"A Purple Heart proves you were smart enough to hatch a plan,
stupid enough to try it and lucky enough to survive!"
Terry W. Himes
JPL Jet Propulsion Laboratory
Dawn Spacecraft Team
Rosetta Sequence Team Lead
Phone: (818) 393-6261
Cell: (818) 653-8213
Fax: (818) 393-3147
[1]thimes@jpl.nasa.gov
References
1.mailto:thimes@jpl.nasa.gov
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Late to the party but I can't believe the sheet metal valve covers are "pushing down" with ~4.5 tons of force. Visualize lifting a 4.5 ton vehicle off the ground by one valve cover ( hook a hoist to the oil filler hole ? ) I mean, come on. GD From: "Joseph F. Byrd, Jr." <byrdjf@embarqmail.com> To: detomaso@server.detomasolist.com Sent: Wednesday, September 14, 2016 8:32 PM Subject: Re: [DeTomaso] Fwd: Re: Oil Leak Fixed. What Torque? Not something I worked with, BUT Assuming the valve cover gasket has an effective diameter of 23” and 0.3” wide. Using neoprene cork with 30% compression at 400 psi loading The torque to provide 30% compression would be 4.7 ft-lbs. Given the gasket will be compressing as the next bolt is tighten, several passes at desired torque till no rotation would be needed. Each of the 8 bolts would be pushing down 1,100 lbf for a total of 8,900 lbf per valve cover The “normal” ¼-20 torque resulting in a bolt loading of 45Kpsi (high grade bolt) would be 6.3 ft-lbs Sort of a rule of thumb I have observed, If allen, using a long key with the short arm for torquing, using the thumb and index finger only provides the max torque Sorry for my ramblings, Joe -----Original Message----- From: DeTomaso [mailto:detomaso-bounces@server.detomasolist.com] On Behalf Of Joseph F. Byrd, Jr. Sent: Wednesday, September 14, 2016 20:01 PM To: 'detomasolist' Subject: Re: [DeTomaso] Fwd: Re: Oil Leak Fixed. What Torque? I haven't been able to find on line, so if someone knows the dimensions of a valve cover gasket (length, width, width) I would appreciate. I am now curious and need to calculate! BTW, 10ft-lbs just for a 1/4-20 seems pretty high. That should have the bolt torque sufficient to prevent backing off (once retorqued after gasket relaxed) -----Original Message----- From: DeTomaso [mailto:detomaso-bounces@server.detomasolist.com] On Behalf Of Dave Londry Sent: Wednesday, September 14, 2016 19:24 PM To: detomasolist Subject: [DeTomaso] Fwd: Re: Oil Leak Fixed. What Torque? My collection of other peoples Torque info, these 2 agree at 10 ft.lb. Needs a 1/4 drive torque wrench - you're in the weeds with the tension spring fully unwound if you use 3/8. (I have a bunch nor added yet - another roundtuit job) Dave On 2016-09-14 12:36 PM, Himes, Terry (397C) wrote: the links above.
Members who post to this list grant license to the list to forward any
Hey Pantera Guru's, I finally got to my Pantera last night. (work is getting in the way of my fun!!) Simple fix. ALL my valve cover bolts were loose. Every one of
I tightened them all but didn't want to over tighten them. Anyone know what the correct torque should be? I have roller rockers and the taller Ford Racing valve covers for clearance. Your thoughts? Terry
"A Purple Heart proves you were smart enough to hatch a plan,
stupid enough to try it and lucky enough to survive!"
Terry W. Himes
JPL Jet Propulsion Laboratory
Dawn Spacecraft Team
Rosetta Sequence Team Lead
Phone: (818) 393-6261
Cell: (818) 653-8213
Fax: (818) 393-3147
[1][3]thimes@jpl.nasa.gov
References
1.mailto:[4]thimes@jpl.nasa.gov
_______________________________________________
Detomaso Email List is not managed by POCA Posted emails must not exceed 1.5 Megabytes DeTomaso mailing list [5]DeTomaso@server.detomasolist.com [6]http://server.detomasolist.com/mailman/listinfo/detomaso
To manage your subscription (change email address, unsubscribe, etc.) use
message posted here to all past, current, or future members of the list. They also grant the list owner permission to maintain an archive or approve the archiving of list messages. _______________________________________________ Detomaso Email List is not managed by POCA Posted emails must not exceed 1.5 Megabytes DeTomaso mailing list DeTomaso@server.detomasolist.com http://server.detomasolist.com/mailman/listinfo/detomaso To manage your subscription (change email address, unsubscribe, etc.) use the links above. Members who post to this list grant license to the list to forward any message posted here to all past, current, or future members of the list. They also grant the list owner permission to maintain an archive or approve the archiving of list messages. _______________________________________________ Detomaso Email List is not managed by POCA Posted emails must not exceed 1.5 Megabytes DeTomaso mailing list DeTomaso@server.detomasolist.com http://server.detomasolist.com/mailman/listinfo/detomaso To manage your subscription (change email address, unsubscribe, etc.) use the links above. Members who post to this list grant license to the list to forward any message posted here to all past, current, or future members of the list. They also grant the list owner permission to maintain an archive or approve the archiving of list messages. Late to the party but I can't believe the sheet metal valve covers are "pushing down" with ~4.5 tons of force. Visualize lifting a 4.5 ton vehicle off the ground by one valve cover ( hook a hoist to the oil filler hole ? ) I mean, come on. GD __________________________________________________________________ From: "Joseph F. Byrd, Jr." <byrdjf@embarqmail.com> To: detomaso@server.detomasolist.com Sent: Wednesday, September 14, 2016 8:32 PM Subject: Re: [DeTomaso] Fwd: Re: Oil Leak Fixed. What Torque? Not something I worked with, BUT Assuming the valve cover gasket has an effective diameter of 23a and 0.3a wide. Using neoprene cork with 30% compression at 400 psi loading The torque to provide 30% compression would be 4.7 ft-lbs. Given the gasket will be compressing as the next bolt is tighten, several passes at desired torque till no rotation would be needed. Each of the 8 bolts would be pushing down 1,100 lbf for a total of 8,900 lbf per valve cover The anormala A 1/4-20 torque resulting in a bolt loading of 45Kpsi (high grade bolt) would be 6.3 ft-lbs Sort of a rule of thumb I have observed, If allen, using a long key with the short arm for torquing, using the thumb and index finger only provides the max torque Sorry for my ramblings, Joe -----Original Message----- From: DeTomaso [mailto:[1]detomaso-bounces@server.detomasolist.com] On Behalf Of Joseph F. Byrd, Jr. Sent: Wednesday, September 14, 2016 20:01 PM To: 'detomasolist' Subject: Re: [DeTomaso] Fwd: Re: Oil Leak Fixed. What Torque? I haven't been able to find on line, so if someone knows the dimensions of a valve cover gasket (length, width, width) I would appreciate. I am now curious and need to calculate! BTW, 10ft-lbs just for a 1/4-20 seems pretty high. That should have the bolt torque sufficient to prevent backing off (once retorqued after gasket relaxed) -----Original Message----- From: DeTomaso [mailto:[2]detomaso-bounces@server.detomasolist.com] On Behalf Of Dave Londry Sent: Wednesday, September 14, 2016 19:24 PM To: detomasolist Subject: [DeTomaso] Fwd: Re: Oil Leak Fixed. What Torque? My collection of other peoples Torque info, these 2 agree at 10 ft.lb. Needs a 1/4 drive torque wrench - you're in the weeds with the tension spring fully unwound if you use 3/8. (I have a bunch nor added yet - another roundtuit job) Dave On 2016-09-14 12:36 PM, Himes, Terry (397C) wrote: them. the links above.
Members who post to this list grant license to the list to forward
any message posted here to all past, current, or future members of the list. They also grant the list owner permission to maintain an archive or approve the archiving of list messages. _______________________________________________ Detomaso Email List is not managed by POCA Posted emails must not exceed 1.5 Megabytes DeTomaso mailing list [7]DeTomaso@server.detomasolist.com [8]http://server.detomasolist.com/mailman/listinfo/detomaso To manage your subscription (change email address, unsubscribe, etc.) use the links above. Members who post to this list grant license to the list to forward any message posted here to all past, current, or future members of the list. They also grant the list owner permission to maintain an archive or approve the archiving of list messages. _______________________________________________ Detomaso Email List is not managed by POCA Posted emails must not exceed 1.5 Megabytes DeTomaso mailing list [9]DeTomaso@server.detomasolist.com [10]http://server.detomasolist.com/mailman/listinfo/detomaso To manage your subscription (change email address, unsubscribe, etc.) use the links above. Members who post to this list grant license to the list to forward any message posted here to all past, current, or future members of the list. They also grant the list owner permission to maintain an archive or approve the archiving of list messages. References 1. mailto:detomaso-bounces@server.detomasolist.com 2. mailto:detomaso-bounces@server.detomasolist.com 3. mailto:thimes@jpl.nasa.gov 4. mailto:thimes@jpl.nasa.gov 5. mailto:DeTomaso@server.detomasolist.com 6. http://server.detomasolist.com/mailman/listinfo/detomaso 7. mailto:DeTomaso@server.detomasolist.com 8. http://server.detomasolist.com/mailman/listinfo/detomaso 9. mailto:DeTomaso@server.detomasolist.com 10. http://server.detomasolist.com/mailman/listinfo/detomaso