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  #13  
Old 01-11-2016, 11:22 PM
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Re: How common are the broken manifold bolts?

Are the lifters held in there when the cam is removed?

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  #14  
Old 01-12-2016, 12:55 PM
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Re: How common are the broken manifold bolts?

Yes, but if you want to make absolutely sure they stay up, use magnets. I bought some from Harbor Freight just in case, but didn't need them. If you're worried about them falling into the engine valley, they won't as the two for each cylinder are held together and can't possibly fall all the way down.
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  #15  
Old 01-13-2016, 06:57 PM
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Re: How common are the broken manifold bolts?

I was just curious how they stayed out of the way while you were putting in the new cam.

Changing the springs seem easy. I am not sure about setting the rockers arms though. Have not seen anything explaining how to do that correctly.
Did you have to drop the oil pan to put the 6.1 tensioner on? Did you replace the timing chain? Are there new seals needed once you have the timing cover off?

I imagine there is a cam out there I can find that is on the milder side but has some gains throughout the RPM range.
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Old 01-13-2016, 08:47 PM
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Re: How common are the broken manifold bolts?

Quote:
Originally Posted by hound View Post
I was just curious how they stayed out of the way while you were putting in the new cam.

Changing the springs seem easy. I am not sure about setting the rockers arms though. Have not seen anything explaining how to do that correctly.
Did you have to drop the oil pan to put the 6.1 tensioner on? Did you replace the timing chain? Are there new seals needed once you have the timing cover off?

I imagine there is a cam out there I can find that is on the milder side but has some gains throughout the RPM range.
The lifters stay out of the way by friction in their bore. When removing the cam, continually turn it and it will push the lifters up out of the way. Have the new cam lubed (I used Lucas Assembly Lube) up and ready to go in and you shouldn't have a problem. It probably wouldn't hurt to have at least one or two telescoping magnets, just in case though.

The rockers are on shafts, one each for intake and exhaust valves on both cylinder banks. They're easy to reset....just make sure they sit properly on the pushrods.

You don't have to drop the pan (a real PITA with 4WD) unless you're going to change the timing chain. Both my Hemi's were fairly low mileage and the chains/gears/tensioner looked like new. The chain tensioner is what tensions the timing chain, so it is behind the timing (front) cover along with the chain and gears. Easy to replace, and the 6.1 tensioner cost me about $30....around 4 years ago.

You'll need a new timing cover to engine block seal (o-ring type), some RTV sealant and a new front crank pulley seal.

As many cams as there are for the Hemi's I am sure you could find something with higher lift, longer duration, and a good lobe separation angle.
Check here: COMP CamsŪ - Cam Recommendation Form

Also, just surf this site for all the info. you'd ever want: How to Choose a Performance Camshaft
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  #17  
Old 01-13-2016, 10:57 PM
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Re: How common are the broken manifold bolts?

I found this thread which is well done with pics. The process does not seem so bad now.

How to do a cam swap on a HEMI - DodgeTalk : Dodge Car Forums, Dodge Truck Forums and Ram Forums

Are you sure you need to drop the oil pan to replace the timing chain? I saw a link where they don't mention it but it wasn't on a Jeep. HEMIŪ 5.7L Engine Timing Chain Replacement

My Jeep has 115,000 miles. At what time should the timing chain be replaced, if at all?
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Old 01-14-2016, 02:53 PM
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Re: How common are the broken manifold bolts?

Quote:
Originally Posted by hound View Post
Are you sure you need to drop the oil pan to replace the timing chain? I saw a link where they don't mention it but it wasn't on a Jeep. HEMIŪ 5.7L Engine Timing Chain Replacement

My Jeep has 115,000 miles. At what time should the timing chain be replaced, if at all?
Yep, I am probably 95% sure. On the Jeep 5.7 you can't remove the oil pump from the crankshaft because of the pick up tube being secured somewhere instide the pan. On at least the Hemi LX the oil pump comes right off and can be swung out of the way, with the pick up tube attached, if you have to change the chain. I didn't spend much time analyzing whether I could get it off on the Jeep if I had to, since I waan't going to change the chain anyway. If I would have had to change it, I would have tried to figure something out. I did crawl under it at the time to see how difficult it would be to remove the pan, and it didn't look like an easy job with all the 4WD stuff in the way.

At 115K, your Jeep is just getting broken in. If it's been properly mainteined, I wouldn't think you'd need a new chain/gears. The only way to tell for sure is when you inspect it after taking it apart. On mine, I did the custom headers/exhaust at just over 60K and the cam at 65,900 miles. It has just over 100K on it now. As I said earlier, the chain, gears and tensioner all looked like new, with very, very slight chain witness marks on the tensioner rubbing block.

EDIT: I just glanced at your reference, and it appears to be a little more difficult on the the late model VVT Hemi's. I believe that the earlier ones are a bit easier.
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  #19  
Old 01-14-2016, 03:23 PM
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Re: How common are the broken manifold bolts?

I am going to assume the chain is ok and plan on replacing it if I do the cam. Without the heads, this is looking to be the best bang for the buck. I have been in talks with Inertiamotorsports about what cam they recommend. It is between the Crazy Jay Plus and the Spartan Plus. They Crazy Jay Plus is designed for more low end torque which I why I am leaning towards that. I will need to new forged rods, exhaust springs, cam bolt, 6.1L tensioner and the valve spring removal tool.


Speaking of which, which tool did you use to replace your springs? I was looking at the Crane Cams tool part number 99476-1. It is not in stock everywhere I have looked but it sounds like people have had good success using it. Here are links to the tool and the and air hose to pressurized the chamber (not sure if it the right one though)
Crane Cams tool http://www.amazon.com/Crane-Cams-994.../dp/B00FMZX0FU


Air hose part http://www.amazon.com/Lisle-19700-Va...ZK09A4SS494K0G
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  #20  
Old 01-14-2016, 10:10 PM
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Re: How common are the broken manifold bolts?

There are several guys running the Crazy Jay or Spartan Plus cams on both the WK forums and some on the LX forums. You may want to look for some reviews on both to see what owners think of them. I run the Frank's Racing, Inc. (FRI) Sidewinder, but I don't think you can get it anymore. It is/was made by Competition Cams for Frank's Racing.

The Crane Cams tool is the one I used, but it does require a bolt with a few less threads, as it kept binding for me. Once I changed the bolt, it worked fine. You can also look into this one: http://www.highhorseperformance.com/...T_p/sahvst.htm Here's what the Crane Cams one looked like: Valve spring compressor - Chry. 5.7- 6.1 Hemi V8 It looks like it has been discontinued though.
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Old 01-16-2016, 03:07 PM
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Re: How common are the broken manifold bolts?

Thanks. I really appreciate your help and knowledge on this. My plate is pretty full for my vacation this year (only home a few weeks a year). I am going to address the headers situation first and see how the Jeep responds. I may get lucky and like how it is and have the urge to go further with the cam Just hoping the AR headers don't turn out to be too much of a headache and I can install them on floor jacks. I'm am hoping I don't have any issue with broken manifold bolts.
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Old 01-17-2016, 07:32 PM
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Re: How common are the broken manifold bolts?

IMO, that's the right way to do it, intake/exhaust first, and then the cam last. You'll notice a pretty fair difference with just a good header back system. Good luck.

Tomorrow I'll be pulling my headers and replace the flange and collector gaskets....for the second time in 5 years. This time I'll be using Nord-Lock wedge washers and high temp. thread lock to hopefully insure I won't have to do it a third time. Last time I just used thread lock, but that only lasted a little longer than the initial install. I'll let you know how it goes.
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Old 01-29-2016, 03:47 PM
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Re: How common are the broken manifold bolts?

Well, I finished (actually my son and I) doing the header maintenance job and, while at it, I also did a brake inspection, caliper slide pin lube and brake fluid flush. The header caper ended up being a giant PITA, which was not really a surprise.

We started by just R and R'ing the flange gaskets, since that was the problem last time I had exhaust leaks. This time, however, when we started it up after the change, it sounded almost the same as it did before we changed the gaskets...WTF? We then did a smoke test of the whole exhaust system and found a huge crack and hole in the No. 2 (front passenger side) primary tube right between where the tube passed the No. 4 and 6 cylinders.....of course the hardest place to get to. We then decided to remove that header for a second time, and had to cut part of the "Y" pipe off to get it out of the vehicle. I got the header welded up (turned out to be about a half dozen cracks in different parts of the header, mostly all minor. After fixing everything, we put it back on and it is now quieter than it's been in quite some time.

I am sure this will not be the last time for this, but at least, this time, the header bolts aren't going to break or come loose again, so no more replacing flange gaskets. I guess from now on it'll be crack repair instead. The headers are now 5 years old, so if I can get another 3 years or so out of them, I'll be happy. Then I'll probably have to figure out what to do for replacements. Here's a few pix of the cracks and work in progress.
Attached Images
File Type: jpg P1010460 (755 x 565).jpg (119.8 KB, 9 views)
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File Type: jpg P1010466 (755 x 565).jpg (48.6 KB, 8 views)
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Old 02-03-2016, 04:52 PM
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Re: How common are the broken manifold bolts?

Been following this on the other forum. I am Sneaky2Toes over there, I assume you are 90grandoneer?


I am going to post in the other thread and ask Nick, the only person known to have the AR 5.7L Headers, and see if he can do the startup procedure to check if he would pass an emissions test.


From everything I can gather about Utah emissions check, it is only an OBDII check. If Nick can verify that everything checks out, I will feel a lot more comfortable about proceeding with the header install this summer.
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