I pulled the dipstick on my 94 YJ and saw chocolate milkshake up and down the stick. Figured I had a head gasket problem. Pulled the oil filter and saw similar consistency and color and not all oil was draining (was heavier than a new one). However, when I drained the oil, it looked normal consistency and color which has me rethinking things.
Also, it has not overheated. I have seen nothing on the temp gauge abnormal. The coolant was low in the overflow but the radiator was full. The only evidence was the dipstick and filter issues.
What should be my next step? i obviously don't want to jump into a HG replacement unless I am sure. Some folks I have talked to speculate it could be condensation, but I am not sure what causes that.
Ok I will try that, read up on it, seems simple enough. However from my limited understanding, if the failure of the gasket occurred such that it opened passage from an oil port to a coolant port, and not to a cylinder, wouldnt that cause brown milkshake oil but not affect compression? Did not notice any power loss either. Still trying to learn about how this works....
A compression test will tell you if your head is blown anywhere. If it is blown between cylinders or to the waterways the compression will read low no matter what. But it will also read low if you have shot valves or rings. Although not as low.
If it's blown your exhaust will smell sweet. If it's bad you will see white exhaust.
I say run a compression test and check your plugs when doing so
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89 YJ.. My first jeep and I won't let it go. ▀||||▀
Current Project: None... I disgust myself.
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So, there is some spread across the cylinders, and I retested #1 since it was the low one, and confirmed the result. #1 is lower than I'd like, but there are not two low cylinders next to each other.
I had already changed the oil after the original finding on the dipstick, so I put in the new plugs and I drove around the neighborhood for 20 min. Temp was stable, no noticeable issues. After driving, I let it cool and rechecked the dipstick. It was clean as a whistle, as was the oil.
Given that the ONLY indication of a potential issue was the original dipstick finding (no overheat, etc), and looking at these results, am I crazy for thinking my YJ is ok? Anyone see anything in these data that I should be concerned about? I really appreciate any further advice.
How long have you had your YJ? Just wondering if the PO could have overheated it once and put on a rebuilt head. Once a head gets warped, it will usually warp again. Only thing I can think of for you other than condensation like was posted before, but that would have to be a lot of condensation to be in all the places you describe.
1991 YJ, rebuilt 4.0L in spring 2009 at 234,000 miles, no lift yet, slightly offset wheels, 235/75/15 tires for now, rag top, sold the hard top. Over 35,000 miles on the rebuild and counting.
I have had it only one year. I could try emailing the PO to find out.
I am curious also if condensation could cause what I saw...however you say "condensation in all the places you describe"...I only saw this on the dipstick. It just seems weird if it is the head gasket since there are no other clear signs (at least not to me!).
You dont always get overheating with a head gasket problem. Just keep a eye on the coolant and the oil and see if you have a repeat. There is no sense in digging deeper until you see if it repeats after the oil change.
Look down in thru the oil fill port. You will see pudding if gasket is bad or cracked head. If not change oil and keep eye on it.
compression test will not always show a bad haead gasket. Such as when between oil port and coolant. Just had that happen a few weeks ago.
You can also get a test kit to test the coolant for the presence of exhaust gases if your that worried. As others have said the easiest and cheapest way is to keep a tight eye on your oil and coolant for a few weeks.
1995 YJ. 2 inch BDS Spring lift. 1 inch shackle lift. 1.25 inch JKS Body Lift 33x12.5x15's. Engo 10,000 pound winch.
[QUOTE=Magnum;14117863] I gave the Jeep the required offering of $$, sweat, and blood, and everything works fine now. -- Jim[/QUOTE]
[QUOTE=ldso;16498409]. It started with a $200 axle, and a few thousand dollars later I was done :)[/QUOTE]
[QUOTE=Luuca;16122017]diagnose the real issue before you start going all Obama on it - spending mad cash you'll need for other important things.
Ask me how I know...[/QUOTE]
[QUOTE=Overhead;17658665]this is also my second set of RC springs this year. I'd rather spend the money again and get something that will last.[/QUOTE]