What did you do to your ZJ today? - Page 1155 - JeepForum.com

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post #17311 of 44374 Old 11-16-2012, 10:10 PM
B93
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1998 ZJ 
 
Join Date: Apr 2012
Location: Whitby
Posts: 342
Quick question: is 130 psi good compression on a 5.9 V8 with about 205,000 miles (330,000 kms) on it?


1998 Grand Cherokee 5.9 Limited. ~356,000 kms
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post #17312 of 44374 Old 11-16-2012, 10:15 PM
ZJMTL
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1996 ZJ 
 
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Quote:
Originally Posted by G-Man2 View Post
I just drove it. I have had several weeks of trouble free daily drive. I need to flush transmission and change fluid in difs and tc. All on my to do list. She is behaving real good lately.
Unless you've flushed it before, I don't recommend flushing the tranny. Others will also most likely chime in with the same advice. Filter and fluid change should be enough, unless you don't want her to run well anymore

'96 Laredo Build Thread - http://www.jeepforum.com/forum/f197/zjmtls-project-thread-daily-driver-weekend-getaway-vehicle-1360544/
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post #17313 of 44374 Old 11-16-2012, 10:20 PM
mandrews000
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1997 ZJ 
 
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Quote:
Originally Posted by ZJMTL

Unless you've flushed it before, I don't recommend flushing the tranny. Others will also most likely chime in with the same advice. Filter and fluid change should be enough, unless you don't want her to run well anymore
Don't flush change your filter and reuse your trans fluid if it still looks good.

On topic arranged to get a 231 and sye kit for Christmas. That means one more trip to Uwharrie for thanksgiving and the I'm swapping the Rigs 242 in to my DD in place of a bad 249!
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post #17314 of 44374 Old 11-17-2012, 01:02 AM
Liquid78
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1997 ZJ 
 
Join Date: May 2012
Location: North Bergen
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i found some parts in the junk yard, rear wiper arm, power steering tank, under the hood lamp, and a vic' can someone tell me what does the vic shows?
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post #17315 of 44374 Old 11-17-2012, 07:27 AM
comptiger5000
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Location: Rochester, NY
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Quote:
Originally Posted by B93 View Post
Quick question: is 130 psi good compression on a 5.9 V8 with about 205,000 miles (330,000 kms) on it?
Was that tested warm or cold? If that's cold, it's probably fine, but you should re-test with the engine at least somewhat warm for a more accurate reading. If that was warm, then that engine is definitely somewhat worn, although it's not shot. Also, try doing the test, then adding a teaspoon of oil to each cylinder and doing it again. If it goes up noticeably, the rings are worn, if it doesn't, it's valves that aren't sealing perfectly.

Also, make sure you're doing the test with all 8 spark plugs out, hold the throttle wide open while cranking, and make sure you hear it spin at least 4 times for each cylinder.

Factory specs is 180psi for these, and somehow, mine still tests 170 - 175 on all 8 cylinders, so I'd be a little surprised if yours is actually that worn after 205k (mine has 143k, last test was done at 136k).
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post #17316 of 44374 Old 11-17-2012, 07:32 AM
G-Man2
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Location: Cordele
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Quote:
Originally Posted by mandrews000

Don't flush change your filter and reuse your trans fluid if it still looks good.

On topic arranged to get a 231 and sye kit for Christmas. That means one more trip to Uwharrie for thanksgiving and the I'm swapping the Rigs 242 in to my DD in place of a bad 249!
The reason I was thinking flush is because I'm not sure it has ATF+4 in it. I wanted to fill it with the correct fluid. What is problem(s) with flush?
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post #17317 of 44374 Old 11-17-2012, 07:35 AM
comptiger5000
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Location: Rochester, NY
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Power flushes can occasionally cause issues if there's any clutch material stuck somewhere in the trans and it gets dislodged and re-stuck somewhere more important (valve body). However, a cooler line flush is safe to do. Once you've done your pan drop and filter change, disconnect the trans cooler feed line, run it into a bucket, start the Jeep. Place it in Neutral, fluid should start flowing. Have a helper watch the level in the bucket. Once 2 - 3 quarts have been pumped out, place it in park or shut it off, the fluid flow will stop. Add 2 - 3 quarts of fluid to the trans and repeat. If you want to get a full flush, it'll probably take about 12 quarts (3 gallons) run through this way, assuming you started after a pan drop.
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post #17318 of 44374 Old 11-17-2012, 07:38 AM
DeansWings
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Nvm

'96 ZJ 4.0 NP242 5.5" Iron Rock Off Road Critical Path Long Arm sitting on 33x12.5x15 Goodyear Duratracs

'06 WK 3.7 2wd stock as a rock.

The Build:
http://www.jeepforum.com/forum/f22/96-zj-build-1262449/

North Texas Grands:
http://www.jeepforum.com/forum/f348/...rands-1323367/

Youtube wheeling vids (mostly from Bridgeport):
http://www.youtube.com/user/MrDeanswings?feature=guide

Grand Slam Texas!:
http://www.jeepforum.com/forum/f197/...3/index19.html
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post #17319 of 44374 Old 11-17-2012, 07:44 AM
G-Man2
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Quote:
Originally Posted by comptiger5000
Power flushes can occasionally cause issues if there's any clutch material stuck somewhere in the trans and it gets dislodged and re-stuck somewhere more important (valve body). However, a cooler line flush is safe to do. Once you've done your pan drop and filter change, disconnect the trans cooler feed line, run it into a bucket, start the Jeep. Place it in Neutral, fluid should start flowing. Have a helper watch the level in the bucket. Once 2 - 3 quarts have been pumped out, place it in park or shut it off, the fluid flow will stop. Add 2 - 3 quarts of fluid to the trans and repeat. If you want to get a full flush, it'll probably take about 12 quarts (3 gallons) run through this way, assuming you started after a pan drop.
Thanks for your response. The cooler line flush method is what I was thinking to use. I suppose the power flush method still uses cooling line for access but uses an external pump to push the fluid vice the engine/tranny pump doing the work?
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post #17320 of 44374 Old 11-17-2012, 07:56 AM
comptiger5000
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Quote:
Originally Posted by G-Man2 View Post
Thanks for your response. The cooler line flush method is what I was thinking to use. I suppose the power flush method still uses cooling line for access but uses an external pump to push the fluid vice the engine/tranny pump doing the work?
Exactly.
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post #17321 of 44374 Old 11-17-2012, 10:04 AM
nickpequignot
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Location: columbia city
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Any one have tips on replacing ball joints? Have to run to town to get a few things. Then gonna go to my buddy's shop and barrow his press to press them in the knuckles.

96 limited build thread-http://www.jeepforum.com/forum/f13/96-limited-build-1351732/
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post #17322 of 44374 Old 11-17-2012, 10:25 AM
cgcarpenter
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Location: west covina
Posts: 758
Bought a new pair of bilisteins of a guy for 200 bucks... Went to start my zj to leave and the battery is dead.... Wtf.. Guessing I need a new battery or alternator now...
Or maybe a starter
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post #17323 of 44374 Old 11-17-2012, 10:33 AM
1slo_camaro
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Location: Cape May/North East
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Quote:
Originally Posted by nickpequignot View Post
Any one have tips on replacing ball joints? Have to run to town to get a few things. Then gonna go to my buddy's shop and barrow his press to press them in the knuckles.
when i did mine getting them out wasnt to bad. i used an air hammer and a sledge just back and forth and they punched out, make sure you get the snap rings off. and i cut the balljoints to get the knuckle out of the way and had room to worrk then took some sand paper and cleaned everything up a coat of black spray paint and it all went back in a whole lot easier

1998 ZJ~~V.r 4~~4.0 with a bunch of fancy stuff that makes it look pretty sitting in the driveway.
PM me for 99+ intake manifolds for sale
$125-sandblasted and painted and shipped
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post #17324 of 44374 Old 11-17-2012, 10:38 AM
nickpequignot
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Location: columbia city
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Quote:
Originally Posted by 1slo_camaro

when i did mine getting them out wasnt to bad. i used an air hammer and a sledge just back and forth and they punched out, make sure you get the snap rings off. and i cut the balljoints to get the knuckle out of the way and had room to worrk then took some sand paper and cleaned everything up a coat of black spray paint and it all went back in a whole lot easier
I'm guessing you take the brake off? Have to take axle shaft out?

96 limited build thread-http://www.jeepforum.com/forum/f13/96-limited-build-1351732/
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post #17325 of 44374 Old 11-17-2012, 10:43 AM
mandrews000
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Join Date: Feb 2012
Posts: 373
Almost finished with the roof rack. Only have to grind it down in a few spots the paint it. Here's what it looks like so far though.
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