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Old 01-10-2020, 06:37 PM   #1
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01 Monaco Dynasty Valve cover Bolts

We recently noticed two or three loose valve cover bolts on our 370 ISL Cummins. Upon closer inspection it looks like the threads are broken off in the head, and the remaining part of the bolt is just hovering in the valve cover. I intended to pull the cover, extract the threaded portion, and install new bolts (apparently the news ones are a stronger design). After the shock of 38 dollars for each bolt wore off, I dove in to the process only to realize that the cover has a beam across it that doesn't seem to allow you to remove the cover at all? Can this be? Any tips or tricks?
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Old 01-10-2020, 06:47 PM   #2
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Quote:
Originally Posted by Afteryou362 View Post
We recently noticed two or three valve cover bolts on our 370 ISL Cummins. Upon closer inspection it looks like the threads are broken off in the head, and the remaining part of the bolt is just hovering in the valve cover. I intended to pull the cover, extract the threaded portion, and install new bolts (apparently the news ones are a stronger design). After the shock of 38 dollars for each bolt wore off, I dove in to the process only to realize that the cover has a beam across it that doesn't seem to allow you to remove the cover at all? Can this be? Any tips or tricks?
$38 bucks each?!?! Unless they have a special shoulder and or head, I think I would go to a Fasteners store and get some nice grade 8 bolts. Good luck with your repair!
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Old 01-10-2020, 07:14 PM   #3
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What is this "beam" your referring to? Possibly a fuel rail?
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Old 01-10-2020, 08:06 PM   #4
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Regular bolts will not fit it is a special design to make you buy from Cummins. I paid 27 ea for the I needed . Cover off the broken ends came out with fingers in
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Old 01-10-2020, 08:12 PM   #5
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The beam looks to be part of the framing/support for the front side of the closet. It's the area between the two hatches, and it sits less than half an inch above the valve cover in the front 6 inches.
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Old 01-10-2020, 08:17 PM   #6
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$38 bucks each?!?! Unless they have a special shoulder and or head, I think I would go to a Fasteners store and get some nice grade 8 bolts. Good luck with your repair!
I had the same thought... and they do have a special shoulder unfortunately. They are very proud of these bolts apparently.
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Old 01-13-2020, 06:41 PM   #7
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Does the cross beam unbolt on the ends?
Is the valve cover leaking?

You can try using a small chisel to get the old bolts out without removing the cover. The chisel width should match the bolt diameter.
First use the small chisel straight on to make a small screwdriver type groove in the remaining bolt. Then tap at an angle to start it turning out.
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Old 01-13-2020, 11:35 PM   #8
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I've peeled back the heat barrier and it does not seem to have a place to unbolt. It's several inches wide and my concern is that wires are running through it. The valve cover is not leaking at the moment, thankfully. For now I've got 2 of the 5 bolts threading, one on each end. I tried to twist out the broken bolt ends with a screwdriver, with no luck. A chisel might get a better grip if I can find one long enough. At this point I'm just sitting back and doing as much research as I can before I make decision. I did put the broken bolts back in, thinking that if the broken end started to wind it's way out, the weight of the bolt might stop it from coming out.
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Old 01-14-2020, 11:10 AM   #9
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I've seen them here at work use an engraver back a broken off bolt out. Haven't tried it at home yet.
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