Guest FordMotherFocus Posted April 21, 2003 Share Posted April 21, 2003 I am assembling my 355 and I got the heads on. What should I torque the head nuts to? I have the crane cams gold roller rockers and when I was taking my motor apart I didn't note the order of them. Does anybody know the order in which they go? They all have different numbers and codes stamped on them. Also, how are the different cylinders numbered? Does it start on the front left side with 1 and count back from there and back to the front right side with 5 and so on? Quote Link to comment Share on other sites More sharing options...
80LS1T Posted April 21, 2003 Share Posted April 21, 2003 First of all are you using new head bolts? If so then you wont have a problem, you just need to find out which engine that is and what heads they are(are they aftermarket?). If your not using new head bolts then you might have a problem. If those heads were originally TTY(torqued-to-yeild) then you can't reuse the bolts because they have already been stretched to their limits. However if they are not TTY then you COULD reuse them but I still wouldn't. You just need to know this information before you install the heads. Guy Quote Link to comment Share on other sites More sharing options...
jt1 Posted April 21, 2003 Share Posted April 21, 2003 Beginning at the front, the drivers side is 1-3-5-7, the pass side is 2-4-6-8. The rockers don't really matter as long as they are all the same ratio. You said head nuts, are you using studs? Anyway, I'd follow the manufacturers recomendation. If they are of unknown origin, spring for a new set, and be sure and use the lube they recomend. John Quote Link to comment Share on other sites More sharing options...
Guest FordMotherFocus Posted April 22, 2003 Share Posted April 22, 2003 Yes I am using head studs. I am not sure of the manufactures recomendations. Quote Link to comment Share on other sites More sharing options...
Guest FordMotherFocus Posted April 22, 2003 Share Posted April 22, 2003 i looked it up in my engine rebuild book and they recomended tourqing them to 65 pounds. I think the rockers are different ratios because of the different numbers stamped on them. I know someone has these rockers and know the answer to my question. Quote Link to comment Share on other sites More sharing options...
Guest Anonymous Posted April 23, 2003 Share Posted April 23, 2003 Who makes these TTY bolts so I can be sure I never use any? Quote Link to comment Share on other sites More sharing options...
Guest FordMotherFocus Posted April 24, 2003 Share Posted April 24, 2003 Half of them have 11- 165 and the other half have 11-1.50 stamped on them. I am guessing one is intake and one is exhaust. Which one is which? Quote Link to comment Share on other sites More sharing options...
Guest Anonymous Posted April 24, 2003 Share Posted April 24, 2003 The rocker numbers you posted show to be: '11'=small block, the rest of it is not shown on crane's website but indications are that '165 and 1.50 are part numbers. Get on their website and go for their 'Tech Help' I am sure they will fix you up correctly. Quote Link to comment Share on other sites More sharing options...
80LS1T Posted April 24, 2003 Share Posted April 24, 2003 A lot of the new engines use TTY specifications because it is supposedly more accurate. Its not really a kind of bolt, its just how you torque down the bolts. Like on my LT1, I torque all the head bolts down to 22ft. lbs in sequence, then I torqued the inside bolts to 80 degrees and the outside(lower) bolts to 65 degrees (in sequence again).(I think thats what it was anyways) You need a special little tool to do this accurately. You can get an attachment for your torque wrench but I used a $400 digital tool that reads out how far you are turning it as you turn your breaker bar. This is the most accurate way of doing it. The little attachment tool is really not that accurate. However it is more economically for someone who is only going to need it once or twice! With torque-to-yeild you are stretching the bolt to its maximum holding power. With a conventional torque spec. you are only torqueing the bolt to like 75% of its holding power. So you can (most of the time) reuse those bolts. However with a TTY bolt since you have stretched the bolt to the limit you cant reuse the bolt because it will not accuratly read out on your torque wrench and you could actually snap the bolt off! Know what I mean now? Guy Quote Link to comment Share on other sites More sharing options...
Pop N Wood Posted April 24, 2003 Share Posted April 24, 2003 It was my understanding that the LS1 engines use TTY bolts everywhere, but does any SBC from an LT1 or older use these bolts? When I was in the Navy I got to watch them torque the bolts on a reactor coolant pump. The torque spec on those required measuring the change in length of the bolt as it was stretched by the nut. Not something they let us lowly sailors do. Quote Link to comment Share on other sites More sharing options...
jt1 Posted April 24, 2003 Share Posted April 24, 2003 FMF, the question about the rockers is a tough one. Is this a freshen of a motor you purchased from some one? If so, I'd contact them and ask how they had the rockers set up and why. Summit's catalog only show the Gold rockers in 1.5 and 1.6, no 1.65's, but they may be a special order item. You could contact Crane and ask about the part #'s, then you'd know for sure what you've got. Where they go depends on the rest of the combo, especially the cam. If the motor was built to spray, it would be a safe guess the 1.6's were used on the exhaust. Or, if they thought it was a little weak on the intake side for some reason, they could have used them on the intake. How the previous owner built it may not be what you want to do. Find out what cam you have , talk to the cam maker about the rockers ratio's. As always, but esp. when using 1.6's, check the pushrod to head clearance and piston to valve clearance. What's the rest of the engine like? Heads, cam, compression, carb & intake? Sorry there's no clear cut answer, but....it depends. John Quote Link to comment Share on other sites More sharing options...
Guest FordMotherFocus Posted April 25, 2003 Share Posted April 25, 2003 I bought this motor and my 75 280z from Long Ta. He is a college student down at UT. He bought the motor from Myron. I have tried getting in contact with both of them but no luck. This is what Im running: 74? camaro 350 c.i. short block rebuild Including 9.5 flat top pistons Crower solid roller camshaft .567 lift 288 dur Crane gold 1.65 roller rockers Crower solid roller lifters Trick flow pushrods DartII heads 2.05/1.60,springs rated to .700 lift Port matched to intake Brodix HV1 pro bracket intake ported with heads Fluid damper SFI balancer high performance water pump with 160 degree thermo MSD 6al ignition box Holley Street Avenger 770 Summit oil pan and melling pump Billet valve covers / Edelbrock pro-flo Accell 8.8 mm wires/ plugs Sanderson QP1000 Headers Quote Link to comment Share on other sites More sharing options...
Mikelly Posted April 25, 2003 Share Posted April 25, 2003 JIm, my 93 GMC Truck used TTY head bolts... They are out there on the standard small blocks... Be carefull! Mike Quote Link to comment Share on other sites More sharing options...
jt1 Posted April 25, 2003 Share Posted April 25, 2003 FMF, that's a good looking combo. It looks like a Crower 00425 cam, which is already a split pattern cam, with a little more lift/duration on the exhaust. IMO, unless you're planning on spraying it, I don't see the need for different ratio rockers. I would call Crower and discuss it with them. You might get a hint about where the 1.65's were by looking at the pushrod holes in the head, they may be clearanced a little, the pushrods are closer to the valve when using the 1.65's. That baby oughta rock! John Quote Link to comment Share on other sites More sharing options...
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