I'm putting on 3/8th alum. roller rockers on s.b.c. I have 3/8th press in studs that have been pinned. Will they work or do I have to change to skrew in studs ? also a silly ? How do you determine if your motor needs thick or thin gasket kit for oil pan ?I'm old and forgetful------Thanks, Vintage Mod
Post by bustedknuckle on Nov 30, 2013 14:52:13 GMT -6
They will work for a while but probably start to break sooner or later depending on your rpm range. I would tap them and install ARP screw in studs and also use stud girdles, they strengthen the valve line when using 3/8 studs. The gasket depends on the year of the block like you I am also on the old side and I don't remember what years use witch gasket.
You need to check the bottom of the rockers. They may hit the stud boss on the head. I would use ARP screw in studs with guide plates. A little extra insurance. Most gasket sets have both thick and thin front pan gaskets. The aftermarket pans that I have used need the thicker front seal.
aluminum roller rockers are much thicker because of the roller shaft in the middle that it pivots on, and will require longer than stock studs. use arp part number 134-7104 to have the right length for full roller rockers. If you try to run them on stock length studs the polylock nuts will not go down far enough on the stud and will break the top of the stud off. You will need to machine the stud boss down the thickness of the hex part of the stud+the thickness of the guide plates, and I usually go an extra .040" inch beyond that, it is better to have the rocker arm float a little higher on the stud than bottom out on the taper. Most later oil pans, and most aftermarket racing oil pans will take the large front oil pan gasket, the manufacturer of the oil pan will usually have an installation sheet with the oil pan, my kevko pan takes the large one. If it does take the large one, go down to the parts store and get an oil pan gasket for a 1983 full size blazer with a 350. They will give you the one piece fel-pro rubber gasket which is very nice, its about 23 bucks at o'reilleys not 50 or whatever the mailorder catalogs get for the one they sell, which is identical.
Post by flipflopoo1oo on Feb 23, 2014 12:00:38 GMT -6
While all sounds good and correct they are most useless as to horsepower! Head studs and valve spring tension are the factors here! I run 120 lbs. springs with pined studs and long slot rockers with the best pushrods! Stock lifters and turn it 7600! Look at every detail of installation of any aftermarket upgrade! Most have there pit falls!
Hey...! 1/8" roll pins, I dont drill all the way through stud. Drill into the stud roughly 1/2 way, if the stud is drilled through it can break where you drilled it. Yes it will stick out, but no shouldn't be in the way. Buy the best roll pins you can get. Spring steel pins is good. I have drilled many heads, yes some will pull through, if the stud is loose before you drill it. You can also pull the studs and have them tapped. I have a K-D tools stud remover #3019 it works well. Eat your wheeties and use oil on tool. Good luck Phil
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