FFR 351W Headers and aluminum heads, recommendation for torque value & sequence?
Visit our community sponsor
FFR 351W Headers and aluminum heads, recommendation for torque value & sequence?
MK4 #9121 - Complete kit - Stroked 351, T5x, 3.55 Rear End, 3-Link - Pickup 6/17/17, 1st start 12/2/17, Go-Kart 12/9/17, Road Worthy 4/27/18
I will generally start at the center then work outward alternating back and forth. You're going to find it impossible to get a torque wrench on them so just try to give them all a consistent "oomph" (that is a well know engineering spec). You need to go back through and snug them after a couple of heat cycles and if you're using locking bolts don't engage them until you've done so.
Jeff
Ditto on Jeff's recommendation. However, I will add that unless your header bolts are zinc plated I recommend you use a zinc based antii-seize for aluminum heads. The zinc helps protect against galvanic corrosion so that when you need to remove them way down the road the aluminum is not corroded and you pull the aluminum threads out with the fasteners.
You may also find that they are much easier to get to if you are under the car. You get a pretty clean shot at all of them. Of course there is the hassle of putting the car up on stands. Nothing is free.
I use stubby wrenches. I will link two together for some leverage.
Don't be surprised to find a few very loose after the first few heat cycles. It takes three or four cycles before tgey seem to stabilize.
Roadster Mk3 5294, 302 Comp XE276HR cam, AFR 185 heads, 650 Quick fuel carb, Air Gap intake, T-5 3.55 gear Levy Upper & Lower Front and Rear control arms Purch Jan 2008 Tagged Mar 2012 Best ET 12.14 @113** SOLD 4/8/18 **
YouTube Videos: Current performance - https://www.youtube.com/channel/UC7c...86xO3U4l4RtVMQ Older build - http://www.youtube.com/user/joeembery#p/u My Pics:
http://s207.photobucket.com/user/Joe...?sort=6&page=1
Generation 3 Type 65 Daytona Coupe Complete Kit #151885 received May 6, 2022. Gen 3 Coyote, IRS, Tremec TKX, American Powertrain hydraulic throwout bearing & Wilwood brakes.
MK4 Basic Kit #7404, 347 EFI - Pro M Racing ECM, 30# injectors, 70 mm throttle body, 80 mm MAF, Edelbrock Performer aluminum heads & RPM II intake, all new G-Force T5, 3:55 gears, Pro 5.0 shifter, 3-link, carbon fiber dash/custom Speedhut gauges and paint by Da Bat.
LOL Thanks guys!!!
MK4 #9121 - Complete kit - Stroked 351, T5x, 3.55 Rear End, 3-Link - Pickup 6/17/17, 1st start 12/2/17, Go-Kart 12/9/17, Road Worthy 4/27/18
Followed by the German engineering term "goodentight".."oomph" (that is a well know engineering spec)
Mark IV 7923 arrived 11-14-12
DOHC 4.6L, Tremec 3650, 3 Link 8.8 w/3.73