I'm starting to assemble the B20a5 tonight. I own both a Chilton and a Haynes repair/service manual. Both repair manuals list different toque specs for these particular parts: Main bearing caps, and piston rod bearings.
From Helms manual (factory shop manual)
Rod, FI engine: 34 lbs
Rod, Carb engine: 23 lbs
Crank caps: 51 lbs. (Oil threads and under bolt head)
Here is what is listed in each manual:
Main bearings/caps
Crank caps Honda Helms = 51 ft/lbs. (Oil threads and under bolt head)
1988-1989 B20a5 Chilton = 48 ft/lbs
1988 B20a5 Haynes = 49 ft/lbs
1989 B20a5 Haynes = 51 ft/lbs
Connecting rods/bearings
Rod F.I Engine Honda Helms = 34 ft/lbs
Rod, Carb engine Honda Helms = 23 ft/lbs
1988-1989 B20a5 Chilton = 23 ft/lbs
1988-1989 B20a5 Haynes = 33 ft/lbs
1988-1989 B20a3 Haynes = 23 ft/lbs
According to Chilton, the 1988 B20a5 is somehow different than the 1989 B20a5. Or is it?
So... What are the Honda torque specs? What have you used? Any Honda techs here that would verify this for me please?
From Helms manual (factory shop manual)
Rod, FI engine: 34 lbs
Rod, Carb engine: 23 lbs
Crank caps: 51 lbs. (Oil threads and under bolt head)
Here is what is listed in each manual:
Main bearings/caps
Crank caps Honda Helms = 51 ft/lbs. (Oil threads and under bolt head)
1988-1989 B20a5 Chilton = 48 ft/lbs
1988 B20a5 Haynes = 49 ft/lbs
1989 B20a5 Haynes = 51 ft/lbs
Connecting rods/bearings
Rod F.I Engine Honda Helms = 34 ft/lbs
Rod, Carb engine Honda Helms = 23 ft/lbs
1988-1989 B20a5 Chilton = 23 ft/lbs
1988-1989 B20a5 Haynes = 33 ft/lbs
1988-1989 B20a3 Haynes = 23 ft/lbs
According to Chilton, the 1988 B20a5 is somehow different than the 1989 B20a5. Or is it?
So... What are the Honda torque specs? What have you used? Any Honda techs here that would verify this for me please?
MustardCat said:
