T O P I C R E V I E W
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zpyro35
Member # 3745
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posted
I tried to bolt on the roller rockers I bought, but the bolts will only go so far until they're way too hard to turn. I thought these were supposed to be bolt-on? they're the 1.7 pedestal mount rockers, w/ the ford casting # on em. apparently the bolt holes have to be re-tapped? does anyone know the size and pitch of the tap needed? thanks
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JohnB
Member # 969
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posted
Are you using the required stock parts as well?
It sound like you've left the bars out...
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zpyro35
Member # 3745
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posted
bars? do you mean the part that kinda ties the pairs of rockers together? I didn't know that you were supposed to use any stock parts.
I have the rocker assembly, the bolt, the part that goes under the rocker that it pivots on (dunno what to call it), some shims, and the part that goes underneath it all and goes between the pair of rockers. when I try to tighten the bolts down, they only go so far, there's still at least 1/8" between the head of the bolt and the flat part of the rocker that it's supposed to tighten down on
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JohnB
Member # 969
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posted
Yes, you need to use the part that links both the rockers. Do not use shims unless you've got a pre-load issue.
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HungryHippo
Member # 537
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posted
you need to reuse the bars
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zpyro35
Member # 3745
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posted
thing is, I can't tighten the bolts down far enough for that bar to make any difference
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FasterDamnit
Member # 442
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posted
Are you using the bolts that came with the rockers? How do they compare to the stock bolts in length?
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zpyro35
Member # 3745
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posted
well I just measured the bolts with a micrometer, the ones that came with the roller rockers are in fact thicker than the stockers. seems the stock bolts are 3/8, the new ones 5/16? or maybe I can't read a micrometer right...
point is, the new bolt's threads are bigger than the stock ones. but at the top of the bolt, where there are no threads, it's the same size as the stock bolt's threads should I just take the bolt to the hardware store and try to get a tap that matches it?
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JohnB
Member # 969
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posted
No, what you need to do is this...
1. Make sure you indeed have 5/16" pedestal mount rockers 2. Make sure you have all the required hardware 3. Make sure the hardware you have for the rockers is the CORRECT hardware (size, type, length, grade of bolt) 4. Learn how to use tools correctly.
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zpyro35
Member # 3745
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posted
quote: Originally posted by JohnB: No, what you need to do is this...
1. Make sure you indeed have 5/16" pedestal mount rockers 2. Make sure you have all the required hardware 3. Make sure the hardware you have for the rockers is the CORRECT hardware (size, type, length, grade of bolt) 4. Learn how to use tools correctly.
how do I do all of that? 1. I measured the bolt, and it came closest to 5/16". I bought them here, off a guy w/ the name Coupe. Said they were "new 93 Cobra style Crane 1.7 Roller Rockers," which they are. should those rockers come with bolts that will go in the stock holes? 2. This is what I got and this is how it goes together right?? this is how it looks on the head 3. No clue what is what, just goin by what was included 4.Hey, it's been years since I've touched a micrometer
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zpyro35
Member # 3745
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posted
difference between stock bolt and the roller rocker bolt this is a shot of the stock bolt (left) and the bolts that came with the rockers (right), both bolted down as far as possible. this is a shot showing how much of the bolt is screwed in this is showing how much the rocker moves with the bolt screwed in as far as possible. the pushrod is all the way down, but I still don't think there should be this much room
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BlueOvalRacing
Member # 1531
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posted
I don't know about your rocker situation, but I will say that every picture you show has what looks like paint chips all over the place. The #1 rule of engine assembly is KEEP STUFF CLEAN. All that paint is going to cause you problems down the road. Just my $.02
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zpyro35
Member # 3745
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posted
what paint chips?
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BlueOvalRacing
Member # 1531
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posted
I said it looks like paint chips...
Maybe I should have said it looks like the heads/springs/retainers/bolts/alignment plates were rolled around in a sandbox that had hair mixed in it, then bolted to a shortblock.
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zpyro35
Member # 3745
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posted
quote: Originally posted by BlueOvalRacing: Maybe I should have said it looks like the heads/springs/retainers/bolts/alignment plates were rolled around in a sandbox that had hair mixed in it, then bolted to a shortblock.
lol, k as long as they aren't paint chips never really noticed it, this is my first engine
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zpyro35
Member # 3745
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posted
so would I be alright tapping the holes or what?
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zpyro35
Member # 3745
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posted
or maybe it's just these bolts? where could I get new ones?
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HungryHippo
Member # 537
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posted
you really shouldnt have to. i got the replacement bolts from NAPA
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zpyro35
Member # 3745
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posted
k I'll try there. I'll probably take both the stock bolts and the other ones to a hardware store and see what they say about em. hopefully it's just these bolts are screwy
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zpyro35
Member # 3745
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posted
well turns out it's just the bolts that came with the rockers are screwed up. bought a new bolt and it screws in fine now I've just gotta find a place that has more than 5 of em...
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