Roller Rocker popped off '02 H.O. - lifter or valve seat? - JeepForum.com
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post #1 of 23 Old 07-23-2021, 01:10 PM Thread Starter
Ian02WJOverland
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Roller Rocker popped off '02 H.O. - lifter or valve seat?

My '02 H.O. just popped a roller rocker at Cylinder #5. I limped the motor a mile home under 1500rpm. When I removed the driver's side valve cover a rocker at Cylinder #5 was off. I removed the lash adjuster and doesn't seem to have any issues (doesn't compress at all). I'm going to replace all spark plugs and all lash adjusters. How would you tell visually if it's a valve seat issue? I can't see any signs of the valve or spring damage.

I don't have compression tools/reader at the moment.

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post #2 of 23 Old 07-24-2021, 07:27 AM
cDee63
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Pry it back on and start it, be ready to cut it quick if you hear death noises. If the seat is still intact it will run normal.
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2004 Limited, 4.7 modded slightly, IRO 3" RockLink LA front, adjustable SA rear, Bilsteins, Addco bar, JKS disconnects. Coming attractions include 242hd, IRO SYE and Woods DS right after the new engine/trans..
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post #3 of 23 Old 07-24-2021, 07:32 AM
Bigrigr
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I watched a video of a guy that does this every so often when his 4.7 throws a rocker. He just snaps it back in and drives some more. I would say changing your lash adjusters should take care of the problem if it runs ok after you get it back together.

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post #4 of 23 Old 07-24-2021, 08:10 AM
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Yep^^. I know some who also put a very thin washer in the bore under the lash adjuster to raise it a bit, the idea is getting a bit more preload on the adjuster. I personally don't like this however it is an option others have used.

2004 Limited, 4.7 modded slightly, IRO 3" RockLink LA front, adjustable SA rear, Bilsteins, Addco bar, JKS disconnects. Coming attractions include 242hd, IRO SYE and Woods DS right after the new engine/trans..
1974 Ironhead Sportster, total custom
High speed, low drag
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post #5 of 23 Old 07-24-2021, 10:43 AM Thread Starter
Ian02WJOverland
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Originally Posted by cDee63 View Post
Pry it back on and start it, be ready to cut it quick if you hear death noises. If the seat is still intact it will run normal.
Tinkered with it this morning and the space to place the rocker is wide enough to place in there. The valve tip gives as I can grab the top and pull it up 1/3 inch with no resistance and it falls back down. Gotta be the valve then?
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post #6 of 23 Old 07-24-2021, 01:34 PM
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Yep, you dropped a seat. Go ahead and fill out the poll and check out the horror stories. Welcome to the club my friend!

2004 Limited, 4.7 modded slightly, IRO 3" RockLink LA front, adjustable SA rear, Bilsteins, Addco bar, JKS disconnects. Coming attractions include 242hd, IRO SYE and Woods DS right after the new engine/trans..
1974 Ironhead Sportster, total custom
High speed, low drag
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post #7 of 23 Old 07-24-2021, 03:27 PM Thread Starter
Ian02WJOverland
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Oh Jeeez, I bet you're right. It's under warranty, but I'm sure it'll be hell to get it covered. Thanks for pretty much confirming what I suspected.
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post #8 of 23 Old 07-25-2021, 11:32 AM
CJREX
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How many miles on your 4.7?

2004 GC Overland 4.7 HO
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post #9 of 23 Old 07-26-2021, 08:47 AM Thread Starter
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I just hit 135K. Bought used from a dealership out of state last year and even with my extended warranty no shop in Austin wants to touch it. Dang
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post #10 of 23 Old 07-28-2021, 05:54 PM
cDee63
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It being kind of a PITA job is most likely why they won't touch it. Any head replacement on a V engine is honestly and our's is an OHC which probably sounds much scarier (expensive).

2004 Limited, 4.7 modded slightly, IRO 3" RockLink LA front, adjustable SA rear, Bilsteins, Addco bar, JKS disconnects. Coming attractions include 242hd, IRO SYE and Woods DS right after the new engine/trans..
1974 Ironhead Sportster, total custom
High speed, low drag
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post #11 of 23 Old 07-28-2021, 06:53 PM Thread Starter
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Yeah, that's what I'm afraid of. Warranty coverage states all lubricated parts and specifically everything valve related, though it's at the mechanic right now, I'm still waiting for the official diagnosis. I might be boned, and not in a position to get a different vehicle. Even looking into a new motor install just in case. Yikes.
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post #12 of 23 Old 07-28-2021, 07:03 PM
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Quote:
Originally Posted by Ian02WJOverland View Post
Yeah, that's what I'm afraid of. Warranty coverage states all lubricated parts and specifically everything valve related, though it's at the mechanic right now, I'm still waiting for the official diagnosis. I might be boned, and not in a position to get a different vehicle. Even looking into a new motor install just in case. Yikes.
My H.O developed a rod knock due to the timing chain guides snapping off and being sucked up into the oil pick up.

I got lucky found a replacement H.O from 02 for 1400 Canadian plus all new gaskets and did it myself. Replacement engine had 167000 kms, probably 171000 now. They are hard to find here.
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post #13 of 23 Old 07-28-2021, 07:42 PM
speednjay
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When my rocker popped by out it broke the springs, valves and that was it for my h o.
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post #14 of 23 Old 07-28-2021, 08:38 PM
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Quote:
Originally Posted by xcaliber81 View Post
My H.O developed a rod knock due to the timing chain guides snapping off and being sucked up into the oil pick up.

I got lucky found a replacement H.O from 02 for 1400 Canadian plus all new gaskets and did it myself. Replacement engine had 167000 kms, probably 171000 now. They are hard to find here.
Must have a good buddy who helps you find engines
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post #15 of 23 Old 07-28-2021, 08:45 PM
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Must have a good buddy who helps you find engines
I did lol. I still kick my self for not buying that 04 overland in Kamloops for 2000$ though lol. I probably could have just took my plates down there and just drove it home home too lol.
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