Yellow sludge in valve cover - Off-Road Forums & Discussion Groups
Jeep-Short Wheelbase All discussion of short wheelbase Jeeps: CJ, TJ, YJ and JK

 
LinkBack Thread Tools Display Modes
post #1 of (permalink) Old 02-27-2003, 11:41 PM
**DONOTDELETE**
Guest
 
Posts: n/a
Yellow sludge in valve cover

I think I know the answer to this, but I'll proceed anyway.

I removed my valve cover to replace the gasket and the inside of it is coated with a greenish, yellow sludge. I've been noticing this stuff on the oil filler cap for years and some spurts out through the vent hose at the rear of the cover [and into the carb!].

I change my oil and radiator fluid religiously and have never noticed any radiator fluid in the oil or vice-versa.

What's going on?

Thanks to all in advance!


Chris
'85 CJ7/258

Sponsored Links
Advertisement
 
post #2 of (permalink) Old 02-28-2003, 12:06 AM
Keyboard Implanted
 
JeepnGreg's Avatar
 
Join Date: Mar 2000
Location: Eureka IL
Posts: 4,676
Thanks: 0
Thanked 0 Times in 0 Posts
 
Re: Yellow sludge in valve cover

my old CJ7 had that too.....moisture/coolant in the oil is what someone explained it to me as

JeepnGreg is offline  
post #3 of (permalink) Old 02-28-2003, 12:16 AM
Way Outta Control
 
Join Date: Sep 1999
Location: usa
Posts: 10,815
Thanks: 0
Thanked 1 Time in 1 Post
 
Re: Yellow sludge in valve cover

Sounds like you are guessing right.
If it was just a touch of whitish or chocolaty stuff I might
suspect condensation from your cold wet weather.
But the greenish - well, what color is your antifreeze?
Not good. The coolant kills the lubrication of the oil, so
you are killing your bearings, crank, cam, and rings with
it in there.


RRich is offline  
Sponsored Links
Advertisement
 
post #4 of (permalink) Old 02-28-2003, 12:52 AM
**DONOTDELETE**
Guest
 
Posts: n/a
Re: Yellow sludge in valve cover

Okay, now for the next question that I think I know the answer to:

Prognosis? TIme for a rebuild? How's the fluid getting in there? And why don't I see it when I drain my oil? Is it just difficult to detect?

Thanks for any and all advice/condolences.
:^[


Chris
post #5 of (permalink) Old 02-28-2003, 12:57 AM
Way Outta Control
 
Join Date: Sep 1999
Location: The Palouse
Posts: 13,432
Thanks: 1
Thanked 3 Times in 3 Posts
 
Re: Yellow sludge in valve cover

1. Clean out the valve cover, and top end.
2. Fluxh the oil system,
3. Drop and clean the pan,
4. See if it returns, and
5. In how much time...
6. If it's condensation... you've got to
7. Run the Jeep longer to boil off the moisture.
8. If it ruturns in, like a few, days be concerned.,
9. Then check the coolant level,
10. And coolant for oil...
11. Does the goo smell of engine coolant,
12. As you said it has a slight greenish tinge.
LEVE is offline  
post #6 of (permalink) Old 02-28-2003, 01:20 AM
 
Join Date: Dec 2002
Posts: 148
Thanks: 0
Thanked 0 Times in 0 Posts
 
Re: Yellow sludge in valve cover

moisture.... sludge.... looks to me me more like a blown gasket....
desertbuzz is offline  
post #7 of (permalink) Old 02-28-2003, 10:37 AM
**DONOTDELETE**
Guest
 
Posts: n/a
Re: Yellow sludge in valve cover

Okay, assuming the worst, I need to make a decision regrading rebuilding/replacing the engine. It has about 130k on it, so this doesn't come as total blow.

Quesitons, questions, questions...

Where is a good starting point in finding a quality rebuilt 258? What should I look for? Can I trust a place like Advance Auto Parts, etc?

Would I be better off taking my old unit somewhere for the work? I could probably live without driving the Jeep for a month if that's what it takes.

Also, I see that Advance Adaptors carries a bellhousing that mates the 4.0L to a T5. Anyone had experience with that conversion?

I've had this Jeep for four years and have driven the hell out of it. Commuting, toting kids, long drives to the beach, etc. This is my main vehicle and I plan on having it for a long time to come.

Thanks!


Chris

85 CJ7/258/T5
post #8 of (permalink) Old 02-28-2003, 10:48 AM
**DONOTDELETE**
Guest
 
Posts: n/a
Re: Yellow sludge in valve cover

</font><blockquote><font class="small">In reply to:</font><hr />
Advance Adaptors carries a bellhousing that mates the 4.0L to a T5

[/ QUOTE ]
somebody correct me if i'm wrong but the 4.0 and the 4.2 aka 258 will take the place of one another. so no need waste $500 buying that. Personaly if the CJ is going to remain your primary driver go ahead ansd swap in a 4.0. i say while your at it put the fuel injection on it too.
http://wilhelm-tech.com/jeep/mods/40EngineSwap.htm
http://www.hescosc.com/catalog.html
http://www.jeepland.net/
http://www.rockcrawler.com/techrepor...swap/index.htm
heres a few links to get ya started. i've been researching this for a while now and bought a 92 cherokee wrecked with a 4.0 in it to swap it all over for $425 but it needs freshning.
post #9 of (permalink) Old 02-28-2003, 11:06 AM
Can't Get Enough
 
RickB's Avatar
 
Join Date: Dec 2000
Location: Erie, Pa
Posts: 1,125
Thanks: 0
Thanked 0 Times in 0 Posts
 
Re: Yellow sludge in valve cover

</font><blockquote><font class="small">In reply to:</font><hr />
somebody correct me if i'm wrong but the 4.0 and the 4.2 aka 258 will take the place of one another

[/ QUOTE ]
In my case, the 4.0 bolted right up to my 258 bellhousing for a T176. The T5 should bolt right up. The AA bellhousing may have a spot machined in it for the sensor that the 4.0 requires. This will keep it in the stock location. I bought the relocation kit for $189 and used my old bellhousing.
RickB is offline  
post #10 of (permalink) Old 03-03-2003, 12:26 PM
**DONOTDELETE**
Guest
 
Posts: n/a
Re: Yellow sludge in valve cover

Excellent! Thanks guys!

Chris
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Off-Road Forums & Discussion Groups forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in










Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Posting Rules  
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome