coolant oil
08-06-2014, 03:02 PM
#1
Member
Thread Starter
Join Date: Oct 2012
Posts: 168
Likes: 0
Received 0 Likes
on
0 Posts
coolant oil
Well couple of weeks ago I found coolant in my oil (98 cherokee 4.0) so I took the head off and found a leaky head gasket, I replaced all gaskets, and sealed the head, however I.found after the new gasket, there is once again coolant in my oil, why!! Thank you in advance
08-06-2014, 04:09 PM
#4
CF Veteran
Join Date: Sep 2011
Location: Riviera, Texas
Posts: 4,172
Likes: 0
Received 4 Likes
on
4 Posts
Year: 1998 Sport
Model: Cherokee
Engine: 4.0
Looks like you will be having to pull it again and make sure that it isn't warped or you don't have any hairline cracks. You can check if it's warped with a straight edge.
08-06-2014, 09:02 PM
#5
CF Veteran
Join Date: Aug 2011
Location: Nor-Cal Coast
Posts: 10,489
Likes: 0
Received 18 Likes
on
18 Posts
Year: 90,84
Model: Cherokee
Engine: 4.0,2.5
Also...One of the head bolts is suppose to get sealant on the threads, could that be it? ...Also, are you sure it was flushed well, Could it be residual moisture from before?
08-06-2014, 09:24 PM
#6
Member
Thread Starter
Join Date: Oct 2012
Posts: 168
Likes: 0
Received 0 Likes
on
0 Posts
08-06-2014, 09:48 PM
#7
Junior Member
Join Date: Oct 2010
Location: Chicago, IL
Posts: 37
Likes: 0
Received 1 Like
on
1 Post
Year: 1998
Model: Cherokee
Engine: 4.0
For me personally, whenever I have changed a head gasket I find it is imperative to have the head and valves checked by a reputable machine shop. A simple visual check is ineffective in spotting minute imperfections that can have major effects on engine performance. Just my opinion.
Trending Topics
08-07-2014, 07:55 AM
#8
Member
Join Date: Aug 2013
Location: georgia
Posts: 248
Likes: 0
Received 0 Likes
on
0 Posts
Year: 1984
Model: Cherokee
Engine: 4 cyl
^^^this
when you have a blown head gasket, the water turns to steam and causes very high temperatures. Aluminum cylinder heads can lift from this pressure, and when combined with the heat, they can and frequently do warp (even slightly) and it won't necessarily be visible to the naked eye. Yank the head and take it to a decent machine shop and pay to have them check to make sure it isn't warped. If it is, have them machine the surface to true it up, and have a valve job done while it's out before reinstalling. And, use a new head gasket when putting it back on. Small price to pay to save the engine.
when you have a blown head gasket, the water turns to steam and causes very high temperatures. Aluminum cylinder heads can lift from this pressure, and when combined with the heat, they can and frequently do warp (even slightly) and it won't necessarily be visible to the naked eye. Yank the head and take it to a decent machine shop and pay to have them check to make sure it isn't warped. If it is, have them machine the surface to true it up, and have a valve job done while it's out before reinstalling. And, use a new head gasket when putting it back on. Small price to pay to save the engine.
08-07-2014, 08:15 AM
#9
Herp Derp Jerp
Join Date: Nov 2011
Location: Parham, ON
Posts: 18,251
Likes: 0
Received 13 Likes
on
12 Posts
Year: 1999
Model: Cherokee
Engine: 4.0L OBD-II
(OP: this happens to cast iron heads too, but not quite the same degree. It needs to be checked. Also your torque wrench uses lb-ft not in-ft right?
)
Last edited by salad; 08-07-2014 at 08:26 AM.
08-07-2014, 08:43 AM
#10
Member
Thread Starter
Join Date: Oct 2012
Posts: 168
Likes: 0
Received 0 Likes
on
0 Posts
^^^this
when you have a blown head gasket, the water turns to steam and causes very high temperatures. Aluminum cylinder heads can lift from this pressure, and when combined with the heat, they can and frequently do warp (even slightly) and it won't necessarily be visible to the naked eye. Yank the head and take it to a decent machine shop and pay to have them check to make sure it isn't warped. If it is, have them machine the surface to true it up, and have a valve job done while it's out before reinstalling. And, use a new head gasket when putting it back on. Small price to pay to save the engine.
when you have a blown head gasket, the water turns to steam and causes very high temperatures. Aluminum cylinder heads can lift from this pressure, and when combined with the heat, they can and frequently do warp (even slightly) and it won't necessarily be visible to the naked eye. Yank the head and take it to a decent machine shop and pay to have them check to make sure it isn't warped. If it is, have them machine the surface to true it up, and have a valve job done while it's out before reinstalling. And, use a new head gasket when putting it back on. Small price to pay to save the engine.
08-08-2014, 07:45 AM
#13
Member
Join Date: Aug 2013
Location: georgia
Posts: 248
Likes: 0
Received 0 Likes
on
0 Posts
Year: 1984
Model: Cherokee
Engine: 4 cyl
any time you remove a head, for whatever reason, you should spend the few bucks to have it checked for peace of mind. Plus, I hate doing work twice, and R&R a cylinder head more than once is well worth the cost of having the head checked imho
Thread
Thread Starter
Forum
Replies
Last Post
Ye Ol' Cherokee
Stock XJ Cherokee Tech. All XJ Non-modified/stock questions go here
19
05-07-2019 06:15 AM
Calikingcrawler
Stock XJ Cherokee Tech. All XJ Non-modified/stock questions go here
3
09-21-2015 02:27 AM
Azzy
Stock XJ Cherokee Tech. All XJ Non-modified/stock questions go here
0
09-08-2015 10:49 PM
Soilman
Stock XJ Cherokee Tech. All XJ Non-modified/stock questions go here
0
09-06-2015 07:51 AM
neocracka
Stock XJ Cherokee Tech. All XJ Non-modified/stock questions go here
8
09-05-2015 06:50 PM
Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)