High Mileage Points of interest - JeepForum.com

 
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post #1 of 9 Old 01-16-2011, 01:05 PM Thread Starter
jjfrieze
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High Mileage Points of interest

I have a 2000 Grand cherokee 4.7 with 205k on the clock. I try and change the oil around 3-4k intervals.

Since I got so many miles on it what or where would be a good idea to check for some preventive maintenance?

How good or bad is seafoam?
I've used it before in the gas and oil on a couple cars I've owned but i'm a bit uneasy using it because i'm afraid it'll blow a gasket or something. I've noticed on those cars, they've started smoking like crazy shortly after I've treated the oil and changed it. Was it because it was still trying to clean the system after I've changed the oil? or did it seep through the gaskets???

Any input would be great. I'm more of a weekend mechanic.. I know enough to keep my vehicles running and appreciate any information




-Justin

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post #2 of 9 Old 01-16-2011, 01:12 PM
narnwv
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Seafoam is great. Hit up their website and follow their video directions and you'll be good to go with it.

When was the last time plugs were changed? How about Trans fluid? It's good to stay on top of everything to keep these things running right.







PS-got any pics/details of the carputer you mention in your profile?

~Aaron


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post #3 of 9 Old 01-16-2011, 01:42 PM
billzcat1
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Follow the service interval "B" on wjjeeps and you will get a very long life. If you don't know the last time a fluid was changed, it is time now!

http://www.wjjeeps.com/service/maintenance_wj.htm

The easy DIY jobs are diffs, transfer case, tune-up (spark plugs and air filter), power steering fluid, coolant. Transmission fluid is a pretty messy job and I personally prefer to pay someone else to do that.

Other things you can do: clean the throttle body and IAC valve with throttle body cleaner, change the fuel filter/fuel pressure regulator, run some fuel injector cleaner (I like the Techron for 20gal tanks). I have never had good luck with seafoam in the fuel or oil, but great results when pouring it/spraying it into the throttle. If your engine is dirty inside, consider an engine flush product or you can add 1 quart of ATF to the oil, drive 100 miles and then do an oil change.


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~Richard
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post #4 of 9 Old 01-16-2011, 02:58 PM Thread Starter
jjfrieze
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This weekend I'm planning on doing a good change.. Oil, Air filter, and plugs. I've had good results with Boche Plat. 2's... I wanted to get a good idea of what else to have a look at.

I havent done anything with the Trans. though, I do need to check levels. I was thinking I should do a flush or drain and re-fill, but a buddy of mine said since it had so many miles it might actually do more bad than good.

The carputer isn't in the jeep anymore but i got a few snaps of the dash.. none of it completely finished. I took it out shortly after i made a new trim piece for the whole center console, someone smashed my screen.
album: http://albums.mo-power.net/index.php?get=albums&id=167
Moved the H/AC controls down:


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post #5 of 9 Old 01-16-2011, 03:21 PM
billzcat1
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Jeeps tend to like Champion (OE) plugs best. Platinums don't seem to do the trick. The Champion Truck Plugs are very good and should be about $3 each. They have thicker electrodes and insulators to last longer under high-vibration high-heat environments.


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post #6 of 9 Old 01-17-2011, 10:47 AM
barns12
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Just a note: Be careful using engine flushes and ATF on an older engine. If there is any sludge in the engine and the flush breaks it loose, it will clog the oil pickup screen/tube and you will not get proper lubrication if any. Sometimes it is best to just continue with changing the oil regularly. Your Jeep seems to like it so far.
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post #7 of 9 Old 01-17-2011, 12:13 PM
Double E
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Same vehicle here 125K miles. Congrats on yours!

+1 for the cleaning the throttle body & IAC vlve. 2 bolts to take off the air intake, 3 bolts take off the throttle body, 2 electrical connectors to remove, one vacuum hose.

Unbolt the IAC valve body with a torx head bit. Disconnect the 2 throttle cables. Remove & clean. Clean back of throttle body, butterfly valve & all passages. I use brake parts cleaner but something a little less volitaile is good too like carb cleaner.

I just did the plugs (Champions went back in, gap to .040) & the TB cleanout this weekend. Let me know if you have questions....

You might dump & refresh the antifreeze, brake fluid and do a drain/refill of the tranny, front/rear diff if you don't know when it was last done.

'04 Freedom Edition HO & '04 Overland HO (previous '00 Laredo 4.7)
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post #8 of 9 Old 01-17-2011, 12:19 PM
elsapo
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Quote:
Originally Posted by billzcat1 View Post
Jeeps tend to like Champion (OE) plugs best. Platinums don't seem to do the trick. The Champion Truck Plugs are very good and should be about $3 each. They have thicker electrodes and insulators to last longer under high-vibration high-heat environments.
they are out of production unfortunately. I did stick in some Bosch Platnium ir plugs and so far so good. but I think the NGK's are a better bet though and cheaper.
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post #9 of 9 Old 01-17-2011, 01:55 PM
ARFuniN
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Quote:
Originally Posted by elsapo View Post
they are out of production unfortunately. I did stick in some Bosch Platnium ir plugs and so far so good. but I think the NGK's are a better bet though and cheaper.
Check http://www.jeep4x4center.com/product...ber=SPRC12MCC4

Out of production...could be...out of stock...I do not hear her singing yet!
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