Building a '61 Cadillac 390 and in need of oil pump bolts and cam gear bolts ASAP. Anyone know where I can buy some or have specs of bolt sizes needed?
Thanks so much for the help!!
Nathan
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The FSM shows size and torque specs, but not the length. :P
Quote from: Big Fins on November 18, 2019, 05:26:12 PM
The FSM shows size and torque specs, but not the length. :P
Any chance you can share that info? I don't have a FSM unfortunately.
Thanks so much.
Cam sprocket 5/16-18, 15 ft lbs Min, 18 Max.
Oil pump cover to body 1/4-20 40 In Lbs min 45 Max. This is Inch Pounds
Oil pump to rear bearing cap nut. 3/8-24 25 Ft Lbs Min, 30 Max
Quote from: Big Fins on November 19, 2019, 01:28:20 PM
Cam sprocket 5/16-18, 15 ft lbs Min, 18 Max.
Oil pump cover to body 1/4-20 40 In Lbs min 45 Max. This is Inch Pounds
Oil pump to rear bearing cap nut. 3/8-24 25 Ft Lbs Min, 30 Max
Thank you.
Make sure the back side of the bolts you pit in the cam gear do NOT contact the block behind the cam in any way. I don't think they are even 1/2: long, at least not on a 56 365 engine
I was going to say that I remember them being only about 1/2" long, but didn't want to give incorrect info knowingly.
Nathan, I don't have my Master Parts List here at the house, but I do remember that the cam sprocket bolts are a grade 5 bolt and had external star washers under the heads--not sure of the length, sorry. My 1959 390 used studs for the oil pump mount, with split lock washers and nuts to retain the oil pump to the rear main bearing cap.
Daryl Chesterman
Look at the attached, if I have it right the cam sprocket bolt is 5/16-18 and 3/4" long.
Nathan, you can see in Glen's posted parts picture that the oil pump is mounted to two studs on the rear main bearing housing.
Daryl Chesterman