post #1 of Old 03-29-2010, 06:17 AM Thread Starter
DonAltman3
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1988 YJ Wrangler 
 
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oil consumption

Hey gang.. quick question concerning the wifes 2001 V8 Grand Cherokee.

She has been using a little oil lately and we haven't been able to notice any leaks. We have never seen smoke or smelled any oil burning. Last night however I happend to be in another vehicle when she started up the Jeep and I saw the smoke come out of the tail pipe for a brief second.... it was just a puff. Following her around town I noticed when she came to a stop and took off a puff would come out... Just idleing there was no visiable smoke. I am not sure if this would be something with the EGR system or worse yet piston ring blow by. Does anyone else have this same problem and have determined what it is? She has approximatly 130k miles on it.

The Jeep seems to have as much power as it always had.
I hope there might be a easy proceedure or something I can quickly check the emmission system since checking the piston ring leak would require a cylinder vaccum tool.


Thanks for any advise, hints, or suggestions.

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post #2 of Old 03-29-2010, 08:08 AM
LordHobbit
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Valve seals? Do a search

93 red ZJ 190k 4.0. Spent more money than I should have ...

Isn't red the only color a vehicle should be?
If at first you don't succeed, use more speed.
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post #3 of Old 03-29-2010, 08:22 AM
Double E
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If it was already warmed up and still burned a bit of oil at idle but only when accelerating from a stop, I think that's piston rings leaking a little. If it's burning while under acceleration, I think that's valve seals. I may have them backwards...

In any case, there's a compression check in your future and either way, I don't think I'd worry that much about it as long as the oil is clean (no antifreeze/milky oil).

Maybe go up to a 40 weight oil?

Were you using synthetic oil the whole time?

Did it ever get hot to the point of overheating and perhaps score a piston wall?

2000 Laredo 4.7L Selec-Trac. 177K miles, Leather, 245 tires, tow package, crappy CD changer, full size spare, roof cross-rails & sunroof.
Changes & fixes: Rear Addco sway bar & greasble bushings, upgraded headlights, upgraded tail lights, new hood struts (replaced 2X), new rear hatchglass struts, new radiator (replaced 3X), new oil pressure sending unit (replaced 4X), 2 new speed sensors, 2 new door lock actuators, new ignition key cylinder, chrome front tow hooks, Mobil 1 Synthetic 5/30, Purolator Pure One oil filter, EBC slotted & dimpled rotors, EBC Greenstuff pads, new front shocks (replaced 3X), new rear shocks (replaced 2X), new IRO steering stabilizer, new timing chain cover, new water pump, thermostat, new thermostat housing, new high pressure power steering hose, Michelin-X radials, new sunroof assembly, new single-piece lug nuts, new exhaust manifold studs & gasket on driver's side, new Durango alternator. Jeepforum.com sticker, Visit cobaltboatsforum.com when you can!
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post #4 of Old 03-29-2010, 09:26 AM
LordHobbit
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I'd worry about it. That much oil will destroy the cat converter in no time. Better to get it fixed now.

93 red ZJ 190k 4.0. Spent more money than I should have ...

Isn't red the only color a vehicle should be?
If at first you don't succeed, use more speed.
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post #5 of Old 03-29-2010, 04:47 PM
Johannmn
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I second the previous post... get it taken care of soon. It may seem like a lot now but it comes down to one thing. Either you pay a little now or a lot more later.
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post #6 of Old 03-29-2010, 09:14 PM Thread Starter
DonAltman3
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Well... it is just a puff at start up and immidiatly as i accel from a start for a quick puff but it doesn't do it all the time... a cat converter is alot cheaper then pulling the motor and replacing rings.. lol...
But I understand what your saying..

Hard to spend too much money on a 10 year old truck.

It's never run hot.. I run 10w30 regular motor oil.. nothing special.

I'll have to look up valve seals.
Thanks for the suggestions.
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