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Bad day any ideas?

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Old Mar 21, 2010 | 05:23 AM
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like i said just check the oil clearances with a used mismatched cap (plastigauge). if that doesn't work i would just buy a used head, i sold a complete head for 450 shipped. so you should be able to find one for a decent price if the first way doesn't work out.
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Old Mar 21, 2010 | 05:46 AM
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No matter what is done at this point you need to pull the head off and take it to a machine shop.The new(or old used) cap needs to be align bored.
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Old Mar 21, 2010 | 05:54 AM
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I got a new cap from someone local and had my head line bored. So far so good
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Old Mar 21, 2010 | 08:03 AM
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They break from not tightening the caps down evenly/slowly when installing the cams.
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Old Mar 21, 2010 | 08:50 AM
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Originally Posted by m R g S r,Mar 21 2010, 08:23 AM
like i said just check the oil clearances with a used mismatched cap (plastigauge). if that doesn't work i would just buy a used head, i sold a complete head for 450 shipped. so you should be able to find one for a decent price if the first way doesn't work out.
Why would you buy an entire head whey you can buy the rocker and cap assembly only, which is a straight bolt on?
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Old Mar 21, 2010 | 08:53 AM
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Originally Posted by Slows2k,Mar 21 2010, 11:03 AM
They break from not tightening the caps down evenly/slowly when installing the cams.
Follow the manual and tighten it down in steps.
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Old Mar 21, 2010 | 10:57 AM
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Originally Posted by dsddcd,Mar 21 2010, 10:50 AM
Why would you buy an entire head whey you can buy the rocker and cap assembly only, which is a straight bolt on?
You can't buy cam caps/towers new without buying a entire head. You can find them used, only if the seller wants to separate.
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Old Mar 21, 2010 | 11:54 AM
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Originally Posted by Momentum,Mar 18 2010, 06:00 AM
The caps are bolted to the head then bored, they are a matched part since they are machined together and are not technically interchangeable. This is the case on almost every over head cam motor out there. That being said I have had a cap off a spare head in my motor for a long time because of the same issue you had. I have checked the cam and there is no abnormal wear, of course I may have just gotten lucky. If you can't get a cap from someone local I could send you one. Obviously I can't recommend you do this but whats it going to do damage the head? Just make sure the cam spins freely, maybe check it with some plastigauge or something.
Yah I had the same issue doing some cam R&D. After a while one of the caps got fatigued and broke from removing it and reinstalling it. Luckily a junk head was sourced and the donor cap worked fine.
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Old Mar 21, 2010 | 12:45 PM
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Originally Posted by Slows2k,Mar 21 2010, 01:57 PM
You can't buy cam caps/towers new without buying a entire head. You can find them used, only if the seller wants to separate.
Yes, I offered a spare matched set which I could have given him cheap to help but he was able to find one locally and it worked.
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Old Mar 21, 2010 | 02:33 PM
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Originally Posted by Slows2k,Mar 21 2010, 08:03 AM
They break from not tightening the caps down evenly/slowly when installing the cams.
The cam cap broke when taking It off not putting It on. Now If It was already broke or not when It was already tighten down I dont know.
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