They are grade eight, and a special length. Do not use a normal bolt.
The bolt size for a Turbo 350 torque converter is typically 11mm or 7/16-inch, depending on the specific application and manufacturer. Most commonly, the bolts used are Grade 8 bolts, which provide the necessary strength for securing the torque converter to the flexplate. Always refer to the vehicle's service manual for precise specifications and torque settings.
Crankshaft to flexplate: 50-60 lb-ft Flexplate to torque converter: 45 lb-ft Use Grade 8 or better at both locations.
It depends on the diameter of the flange, the type of pipe, the materials, the type, size and grade of bolts, type, grade and size of the flange, and the pressure and temperature of the fluid transported in the pipe. Some pipe flanges require very little torque on their bolts while others need as much as 500 foot-pounds of torque, or more. The design and application will determine the required torque.
310Nm (230ft/lbs) Dry Zinc Plated
Consult a generic torque specification chart based on the size and grade of the of the bolts (top of bolt will have that info on it).
A type of indicator of the temper (grade) of the bolt. I think 3 lines = grade 8. other bolts use different indicators, too. on japenese bolts, sometimes a dot is used so they can count revolutions to reach desired torque of bolt without using torque wrench. hope that helps ya.
The trans will bolt directly to the 350,but you will need a new torque converter. I had a Nova with the same set-up because the guy who had it before me blew the original trans and replaced it with a 700r4 from a Camaro. The Nova now has a 350 with that trans, but like I said new torque converter. you dont have to buy a new torque converter just use the straight six fly wheel on your v8
Torque depends on the size of the bolt as you have already specified grade 8.8. Here are some recommended settings: M8 (13mm across the flat head) 25Nm M10 (17mm across the flat head) 49Nm M16 (24mm across the flat head) 210Nm
For a 1997 Honda Passport, the torque specifications for the flex plate bolts are typically around 40 lb-ft (54 Nm). It's essential to use a crisscross pattern when tightening the bolts to ensure even distribution and to check the manufacturer's service manual for any specific guidelines or torque sequence. Always make sure to use the correct grade of bolts and double-check for any updates or recalls that may affect these specifications.
That could be a major transmission failure. Could be the torque converter
The grade of bolts refers to their strength and load-bearing capacity, which is determined by their material composition and manufacturing process. Commonly, bolt grades are indicated by a number (such as Grade 2, Grade 5, and Grade 8 in the U.S.) or by a marking system that denotes their tensile strength and hardness. Higher-grade bolts can withstand greater stress and are used in more demanding applications. Understanding the grade is essential for ensuring the proper selection of bolts for specific engineering and construction tasks.
They replace the factory body mounting bolts.