Jeep Cherokee been sitting

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03-12-2015 | 01:21 PM

#16

Klutch

Member

Joined: Feb 2015

Posts: 223

Likes: 1

From: Colorado Springs

Year: 2000

Model: Cherokee

Engine: 4.0

Quote:

Originally Posted by Firestorm500

Modern oil and modern engines don't need any additional additives or snake oil to keep them happy.

I agree completely. I would to add trans fluid to the crankcase if the engine had not received adequate oil changes and is seriously gunked up. Also, I used it after I replaced a cracked cylinder head to purge any remaining sludge from the engine.

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03-13-2015 | 04:04 AM

#17

Basslicks

No, I don't lick fish.

Joined: Mar 2011

Posts: 11,167

Likes: 21

From: Northern Kentucky

Year: 1999

Model: Cherokee (XJ)

Engine: 4.0

Quote:

Originally Posted by Klutch

I agree the OP doesn't need to clean out his engine just because it's been sitting for six months. But I don't think all the caution is necessary for someone who wants to clean his engine with trans fluid. It's just oil with a lot of detergent in it. Topping off the oil with a half quart or whole quart won't destroy the bearings. It's really not THAT thin and is no different than using SeaFoam or Marvel Mystery Oil; it's just less expensive.

Ah, yes - sorry I read your post wrong. I was assuming you were talking about COMPLETELY DRAINING the oil and doing the tranny oil trick. Yeah you're right, topping it off with a quart won't hurt anything.

Quote:

Originally Posted by Firestorm500

Modern oil and modern engines don't need any additional additives or snake oil to keep them happy.

Agreed... but the 4.0 isn't a modern engine. It's an old engine design that received its last "update" in the 80s - other than electronics, the internals have remained unchanged - https://www.cherokeeforum.com/f2/rot...8/#post2769854

Quote:

Originally Posted by Klutch

This or MMO as previously mentioned.