SLUDGE ENGINE CAUSE

[vad]

quote:

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Originally posted by JHZR2:
didnt realize the 4 cylynder toyotas were sludge prone... even the 4cyl in my GF's early last-gen 4runner, which sees duty in the USVI (read: very tough service) is clean in the engine. Her mother's camry v6 on the other hand...

Thats a shame. does the camry/scion 2.4L 4cyl sludge up? Thats a decent engine, I liked it in a rental solara I once had.

JMH

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Here is a list of Toyota sludge monsters:

http://yotarepair.com/Sludge_Zone.html

 

[JohnBrowning]

Chrslers 2.7 and Audi's 1.8 are also haveing this same issue. On the DC 2.7 one mechinism of failure is the close procimity of the cat. converter to the timeing cover. This is often the site of the most sever sludge and timeing componet failure is often how people find out their 2.7 is a sludge beast!

 

[LarryL]

I'll bet it's hard to figure out the problem when there are a lot of people that just don't change the oil much, and a few, like us, that use good oil, and change it frequently. Cars now do their job so well, it's easy to forget the maintenance (for some people). Today there are no really bad cars. Back in the 60's you could buy a car that would just fall apart. Remember Fiats, many British cars and anything more than 50k miles old. I do.

 

[Truck&Cycle]

quote:

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Originally posted by Ray H:
"Hot" spots will cook oil, the cooler areas are where the crud will condense out and deposit to. Oxidation tendency is indirectly related to a base oil's inherent viscosity index - the higher the VI, the less tendency that oil will oxidize. The best Group IIIs come in at a 150-160 VI these days and are very close to PAOs in resisting sludging.

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Can we use 15W-50 to keep the VI index high in a slugger?

 

[jsharp]

quote:

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Originally posted by griz:

quote:

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It was the 3VZE and 5SFE I belive!

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Not the 3VZE or 3VZFE, I think. That V6 was in 88-95 vehicles like my '93 pickup. It was the redesigned version that arrived in 1996 (5VZE) that started the major sludge problems in V6s.

The 3VZE had its issues too though, especially popping headgaskets. Toyota issued an HG replacement recall in 1997. Even the replacement HG have caused problems for some. Still, mine is pushing 200K miles with only 1 HG replacment and looks to have another 100K more to go... [/QB]

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The 5VZE has never had sludge problems...