4.7 Dropped Valve Seat - YEAR POLL - Page 2 - JeepForum.com
View Poll Results: What year was your dropped valve 4.7?
1999 8 11.59%
2000 10 14.49%
2001 8 11.59%
2002 19 27.54%
2003 3 4.35%
2004 22 31.88%
Multiple Choice Poll. Voters: 69. You may not vote on this poll

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post #16 of 171 Old 09-04-2016, 11:22 AM
86cj74.2L
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This may sound dumb. But, how do I view the results?

I got it. View pole. Duh......

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post #17 of 171 Old 09-04-2016, 03:48 PM
sdg3205
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Quote:
Originally Posted by 86cj74.2L
View pole.
Don't say that out loud in public!
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post #18 of 171 Old 09-09-2016, 12:20 PM
4xTroy
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~249,500 miles on my '02. Last overheating event was 16 months ago. First was about 4.5 years ago.



Also shattered the casting around the lifter, with shrapnel ripping a hole in the valve cover. More details in this thread:

https://www.jeepforum.com/forum/f310/...naded-3857721/

Jeep Owner for 17 years; Jeep Guy for 4!
'02 Laredo 4.7L / OME HD & Billies / 255/70R17 GG AT2

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post #19 of 171 Old 09-10-2016, 06:54 AM
alfaitalia
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At least the seat in still in one piece unlike others I've seen where is in many pieces and embedded in the piston crown! Sometimes bits go into the inlet tract and manifold and get jammed in there....only to reappear to damage the freshly rebuilt engine....something to be aware off.

If you can't fix it with a hammer, you've got yourself an electrical problem!
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post #20 of 171 Old 09-10-2016, 09:07 AM
HarryH3
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One big limitation with this poll is that the majority of WJ owners that have suffered a dropped valve seat most like do not come to the site any longer. The WJ went to the junkyard, they swore to never again purchase anything made by Jeep, and are now driving a different brand.
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post #21 of 171 Old 09-10-2016, 09:53 AM
sdg3205
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Yeah I hear you. One thought I had to help collect data would be if new subscribers were asked voluntarily to answer some basic questions when registering with the forum. It wouldn't be required and they could "skip" the steps, but it could help to gather more info. Not sure if that's possible or not.
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post #22 of 171 Old 09-10-2016, 02:16 PM Thread Starter
ChrisHager
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Quote:
Originally Posted by sdg3205 View Post
Yeah I hear you. One thought I had to help collect data would be if new subscribers were asked voluntarily to answer some basic questions when registering with the forum. It wouldn't be required and they could "skip" the steps, but it could help to gather more info. Not sure if that's possible or not.
That's a pretty big upgrade that likely wouldn't fly. You'd have to customize the questions per vehicle. Plus, people signing up typically dont want to spend much time doing so. We try to keep up on the FAQs and stickies for new users to look through, though I imagine most don't.

~Chris
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post #23 of 171 Old 09-11-2016, 04:09 PM
guygene
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I have an XK, but the 4.7 question caught my attention. Yeah there are known issues with the 4.7 all across the dodge/jeep line. It doesn't seem to matter what year, but overheating or oil sludge seem to be recurring themes.
http://publicrela.blogspot.com/2014/...-problems.html
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post #24 of 171 Old 09-11-2016, 04:39 PM
BuickNut
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Oh my! The 4.7 is soooo bad about dropping valves, all 4 engines. Lol
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post #25 of 171 Old 09-23-2016, 05:51 PM
56BelAir
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2001 valve seat dropped. I had my engine rebuilt at 134k miles.

2001 Jeep Grand Cherokee Limited
Red
Spectacular sterosystem
Pretty cool roof rack
4.7 V8
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post #26 of 171 Old 09-23-2016, 11:31 PM
sdg3205
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Quote:
Originally Posted by 56BelAir
2001 valve seat dropped. I had my engine rebuilt at 134k miles.
It just dropped again or dropped at 134k miles?

What was the circumstance? Random cause? Overheat? Normal conditions? At start up?
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post #27 of 171 Old 09-24-2016, 01:57 AM
56BelAir
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valve seat dropping

I think I overheated my engine revving in 4 low racing on ice. 3 months later my valve seat dropped at 134K miles.

2001 Jeep Grand Cherokee Limited
Red
Spectacular sterosystem
Pretty cool roof rack
4.7 V8
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post #28 of 171 Old 09-25-2016, 08:40 AM
sdg3205
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Quote:
Originally Posted by 56BelAir
3 months later my valve seat dropped at 134K miles.
How? At start up? While driving?
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post #29 of 171 Old 09-27-2016, 02:18 PM
OsteKuste
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Quote:
Originally Posted by sdg3205
Don't say that out loud in public!
View poll.....uhhhhhh


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post #30 of 171 Old 09-29-2016, 08:40 PM
LaddieHanus
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My Wife's 2004 Didn't drop a valve seat but blew a head gasket. I told my machine shop to go ahead and replace the seats anyway and his opinion was that if the head gasket hadn't blown I would have dropped a seat sometime later. Did a full rebuild including valve seats new rings polished crank It had blown a radiator about a year before and had overheated. The engine was rebuilt at 207537 miles and I finished installing it today, runs great. My wife likes her wj and doesn't like the looks of the WK and WK2.

Next 4.7 I work on will only have 6 cylinders (stroked 4.0) in my 89 wrangler/

Laddie Hanus

2009 JKU Rubicon
97 TJ Sahara
89 YJ
2000 Dodge/Cummins
1973 Road Runner GTX 440hp
2013 Forest River Sunseeker Class C motorhome
2004 GC Limited (Wife Jeep) 4.7 HO rebuilt 9/2016
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