Mustard in my oil cap?? WTF
02-20-2010, 11:23 AM
#1
Mustard in my oil cap?? WTF Ok so I was chaning the oil the other day, bought me some RP 5-30 and a K&N filter... "on sale 5 qts and the filter for 50 bucks"... Well I drain my old oil out of it, which was also RP, check my filter (mobil 1) and everything looks as it should... No milkyness in the oil no metal shavings in the filter, when the filter is drained it looks pretty much new still.. "4500 miles between changes"
Ok so all looks good, I put the new filter in, tighten up the drain plug and go to put oil in the engine.... The cap is kinda stuck...SO I muscle it open and I find this mustard like substance that was causing my cap to sieze up... Well its all under the cap in huge gobs, and down the drain tube about 2 knuckles but not all the way down.... I cleaned it all out because obviously it's not supposed to be their but my question is WTF is it!!! I have seen when oil gets water in it before and it never looked like this, but that was conventional oil. I have been using RP for a few years now and never seen anything like this and my last oil change nothing as well..... the oil looked like it should.....oil....and I have had no other real problems with it other then an occasional piston slap when its cold..... Any Ideas??
Here is just one picture I took, I did take a couple more.... but it has me baffled..... It literally looked and felt like mustard....
Ok so all looks good, I put the new filter in, tighten up the drain plug and go to put oil in the engine.... The cap is kinda stuck...SO I muscle it open and I find this mustard like substance that was causing my cap to sieze up... Well its all under the cap in huge gobs, and down the drain tube about 2 knuckles but not all the way down.... I cleaned it all out because obviously it's not supposed to be their but my question is WTF is it!!! I have seen when oil gets water in it before and it never looked like this, but that was conventional oil. I have been using RP for a few years now and never seen anything like this and my last oil change nothing as well..... the oil looked like it should.....oil....and I have had no other real problems with it other then an occasional piston slap when its cold..... Any Ideas??
Here is just one picture I took, I did take a couple more.... but it has me baffled..... It literally looked and felt like mustard....
02-20-2010, 11:24 AM
#2
http://www.facebook.com/photo.php?pi...1&id=506522014
I had already cleaned out most of the "mustard" before the picture was taken, then I realized I should take a picture...so I Scooped up what was left on my finger....
I had already cleaned out most of the "mustard" before the picture was taken, then I realized I should take a picture...so I Scooped up what was left on my finger....
02-20-2010, 12:18 PM
#6
02-20-2010, 12:20 PM
#7
If you were talking about the "piston" slap thing, I don't drive it when it's doing that it sits in my driveway warming up... I have a 1 year old that goes everywhere with me and I wont put him into a freezing car....so by the time I get in to drive the piston slap, if their was any "since it doesn't always do it" is gone...but this does not solve the mustard in the oil cap and filler or how I can fix it...which is really the root of my question...how do I fix it...
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02-20-2010, 01:22 PM
#8
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i've seen something similar before but it was more green than yellow. on my friends camaro he had a bad head gasket, and the color was from coolant.
u could do a leakdown test just to see
u could do a leakdown test just to see
02-20-2010, 01:23 PM
#9
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most lickly cause is condensation mixed with oil
it is something that is more common than you think it is. propper warm up can reduce it but since you do warm up your engine before you drive another cause could be a stuck or clauged pcv valve
it is something that is more common than you think it is. propper warm up can reduce it but since you do warm up your engine before you drive another cause could be a stuck or clauged pcv valve
02-20-2010, 01:30 PM
#11
((oil came out about at 60 degrees))
02-20-2010, 01:32 PM
#12
I had a BBC with aluminum valve covers on it, and I went to lash valves one afternoon, after letting the engine warm up, pulled the valve cover off and a good portion of the underside of the valve cover was covered in just what you posted from your Facebook pic. It's simply condensation forming then mixing with the oil. My machine shop machinist told me to, "...drive the car and not worry about it...it is normal..."
02-20-2010, 01:35 PM
#13
+1
I had a BBC with aluminum valve covers on it, and I went to lash valves one afternoon, after letting the engine warm up, pulled the valve cover off and a good portion of the underside of the valve cover was covered in just what you posted from your Facebook pic. It's simply condensation forming then mixing with the oil. My machine shop machinist told me to, "...drive the car and not worry about it...it is normal..."
I had a BBC with aluminum valve covers on it, and I went to lash valves one afternoon, after letting the engine warm up, pulled the valve cover off and a good portion of the underside of the valve cover was covered in just what you posted from your Facebook pic. It's simply condensation forming then mixing with the oil. My machine shop machinist told me to, "...drive the car and not worry about it...it is normal..."
02-20-2010, 01:40 PM
#14
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it is water (condensatoin) mixed with your oil like i said its more common than you think it is but many people dont like it and i would understand why.You pcv valve should be in your valve cover, there should be a hose coming out of it you can un plug it, if you dont know how to check it its pretty cheap to replace (4-10$at local parts shop)
02-20-2010, 01:42 PM
#15
it is water (condensatoin) mixed with your oil like i said its more common than you think it is but many people dont like it and i would understand why.You pcv valve should be in your valve cover, there should be a hose coming out of it you can un plug it, if you dont know how to check it its pretty cheap to replace (4-10$at local parts shop)
02-20-2010, 02:05 PM
#16
Make sure your PVC system is correctly connected. Make sure you drive far enough to burn it off, if you don't take the car for a good run every few days. I had this problem with one of my other cars, total repair bill was over $3,000 because it got cold and the condensation froze wreaking havoc with several internal parts.
Last edited by vettenuts; 02-20-2010 at 08:18 PM.
02-20-2010, 02:13 PM
#17
I get it on my cap too from time to time, I dont notice it at every oil change just some. It appears to be normal on these cars, there have been many posts about this on this forum. I have never had this problem on my other vehicles. I suspected my PCV valve when I saw it the first time but it was fine and I replaced it anyway and it still does it, so I just deal with it.
02-20-2010, 02:34 PM
#18
Make sure your PVC system is correctly connected. Make sure you drive far enough to burn it off, if you don't take the car for a good run every few days. I had this problem with one of my other cars, total repair bill was over $3,000 because it got cold and the condensation froze reaking havoc with several internal parts.
02-20-2010, 03:23 PM
#19
I'm not really sure what or how the PCV plays into this happening. Not saying that it couldn't happen, i'm just at a loss as to why a PCV would cause this. I ran a breather cap on my valve covers and it still happened. Never tried to run a PVC on my old school BBC though. Hmmm...
02-20-2010, 03:37 PM
#20
I'm not really sure what or how the PCV plays into this happening. Not saying that it couldn't happen, i'm just at a loss as to why a PCV would cause this. I ran a breather cap on my valve covers and it still happened. Never tried to run a PVC on my old school BBC though. Hmmm...