the fastest way to tell is if the center intake bolts are not there.the vortec heads that everyone wants for performance have no center intake bolts.
The torque specifications, for a 4.3 liter engine manifold, is 45 pounds per square inch. Torque the manifold bolts in 15 pound intervals.
the fastest way to tell is if the center intake bolts are not there.the vortec heads that everyone wants for performance have no center intake bolts.See link below.
Yes, they will fit, and increase torque by a good amount. However, the Vortec heads used a vertical intake bolt design, so you will not be able to use your intake manifold. Side note on the vertical intake bolts, you also need to get Vortec specific intake bolts, because they bottom out in the heads to stop from overtightening and seal better. All in all, vortecs are a good purchase, if you have the money for a new intake manifold. Edelbrock makes some great ones specifically for vortec heads on older engines. look into it. hope i could help.
Yes an 89 350 will bolt up to original Vortec heads. However, Vortec heads have an 8 bolt inatke manifold that is different from the standard 89' intake. Its worth mentioning that the intake manifolds changed in 1986. Prior to 1986 all intake manifolds for a sbc had 12 bolts. These 12 bolts all secured the intake to the head at the same angle. In 1986, or primarily in 1987 the intakes 4 center bolts were changed to a steeper angle. With the introduction of the vortec head came a new 8 bolt intake eliminating the 4 center bolts. If you plan to use Vortec heads on any V8 be it a 305,327,350 or bigger, you will need a Vortec intake manifold as well. You can also buy an after market intake to run a carburetor on a set of Vortec heads in place of the TBI injection.
Into the heads only.
you can as long as you use your TBI heads if you want to use the vortec heads with TBI you will need a special intake manifold or a carb manifold with a adapter to mount your throttle body to the carb manifold heres some more info TBI heads will mount to the vortec block TBI intake manifold has 12 bolts vortec intake manifold has 8 bolts
The 350 cubic inch Chevrolet intake manifold bolts have a torque specification of Haiti pounds psi. The bolts should be torqued at 40 pound intervals.
75 ft lbs
Intake bolts should be torqued to 35 ft lbs in the appropriate sequence. There should be 12 total "intake" bolts
torque for bolts upper intake 1999 ford taurus 3.0 dohc
what is the torque specifications for the intake bolts on a ford 4.2L?
Depends on the diameter of your intake bolts. For 5/16" bolts torque is 23-25 ft lbs, 3/8" bolts are 28-32 ft lbs, and the 1/4" bolts are torqued 6-9 ft lbs.
I FOUND THIS AT WWW.AUTOZONE.COM, CLICK ON VEHICLE SPECS . For your 1999 CHEVROLET TRUCK BLAZER 2WD: INTAKE BOLT TORQUE FOOT POUNDS (FINAL TORQUE) TORQUE LOWER MANIFOLD BOLTS TO 27 IN/LBS TORQUE LOWER BOLTS TO 9 FT/LBS TORQUE LOWER BOLTS TO 11 FT/LBS TORQUE UPPER MANIFOLD BOLTS TO 44 IN/LBS TORQUE UPPER MANIFOLD BOLTS TO 7 FT/LBS (TO TORQUE BOLTS & NUTS, START IN CENTER USING CRISSCROSS PATTERN)
35 ft. lbs. on the intake, and 70 ft. lbs. on the flywheel.
40 FT. LBS
lower intake is 132 lb's upper intake is 89 lb
I believe the torque is figured on the bolt size, not the material. you are using steel bolts ,therefore the torque for an intake bolt on a sm. block is 20 ft. lbs.
Get a manual on your car and it will give you the settings of the intake, exhaust bolts plus the head bolts and torque pattern.
35 Ft. Lbs
for the rocker arms bolts its-- 98 and later, step 1- 168 in-lbs. step 2-- rotate an additional 30-degrees. this is all for a 3.1 v6, the intake bolts are -- (lower) step 1, 62 in-lbs, step2, 115 in-lbs, intake manifold bolts/studs(upper)---18 ft-lbs,