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post #1 of 5 (permalink) Old 02-10-2019, 11:21 AM Thread Starter
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spark plug torque?

In the garage as we speek and cant find torque specs for the plugs on my 96 tbird 4.6...does anyone know?
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post #2 of 5 (permalink) Old 02-10-2019, 01:29 PM
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"9-20 Nm (80-177 lb-in)." Approx 7-14 lb-ft

1996 Thunderbird LX (4.6), previous daily driver

1995 Mustang GT (5.0), daily driver
1995 GMC C2500 (5.7), alternate daily driver
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post #3 of 5 (permalink) Old 02-10-2019, 01:31 PM
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Searching this answer would have resulted in the answer, 13lbs.

Or you can hand torque them until "snug" is also appropriate.

'97 Bird, "Pearl": L/R 2.5in Magnaflow Hi-Flow CATs | PI Intake & PI Cams | Suspension Rebuild

'13 Taurus, "The Bull": 3.5L Goodness

'00 2dr v6 Accord, "Dirty Girl": Magnaflow Hi-Flow CAT | Greddy SP2 CAT-Back | Eibach ProKit springs | Eibach F/R Sway Bars | KYB-GR2 struts
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post #4 of 5 (permalink) Old 02-10-2019, 07:15 PM
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The stock NPI heads are more forgiving than later PI Heads. PI heads have 4 threads (can't recall if later year models revised this or not). If you over torque spark plugs in a PI head, they'll blow out.

97 Thunderbird LX (The GT Bird)
2003 Explorer WAP block with Modular Head Shop "street ported" heads and Stage 2 PI NA cams, 75mm Accufab throttle body, C&L upper intake plenum, Kooks 1.75" primary/3" collector headers, 2.5" full exhaust with mid mount Magnaflow dual in/out muffler, 24lb/hr injectors, 80mm MAF, Tuning from Don @ www.lasotaracing.com, CAI that feeds from fenderwell. Jmod, 3.73:1 TL in Mark VIII carrier, Mark VIII aluminum LCAs, 93 Mark VIII driveshaft, PBR brakes (soon to be Cobras), 18x9 wheels with 35mm offset, 255/40/ZR18 Tires, Front and Rear strut/shock bracing, GR-2 shocks, Eibach 1.5" springs, 1989 SC front and rear sway bars.
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post #5 of 5 (permalink) Old 02-10-2019, 08:30 PM Thread Starter
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I did search but found different answers. ended up going with 12 ft lbs. Didnt think i was going to need wires but i think i do now. After new plugs she idles with a slight skip. Double checked the wires and they are correct to the firing order. Tomorrow ill be doing wires. got caught up doing my water pump also today
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