On Thu, 17 Apr 2008 10:20:59 -0400, "Noah" <n_o_a_h_2000@[EMAIL PROTECTED]
>
wrote:
>
>"PeterD" <peter2@[EMAIL PROTECTED]
> wrote in message
>news:kkfe04le0u8ta8pr1lq0e7ld9g2v0d6dl2@[EMAIL PROTECTED]
>> On Wed, 16 Apr 2008 23:34:08 -0400, "Noah" <n_o_a_h_2000@[EMAIL PROTECTED]
>
>> wrote:
>>
>>>1999 Cherokee Laredo. 4.0 engine. 120000 miles. We've only has this
>>>thing
>>>for a few months.
>>>
>>>First - pretty sure the head gasket is blown. There's oil in the
coolant.
>>>The oil is not contaminated and there has been no loss of coolant. I
>>>can't
>>>think of anything else that might have contaminated the coolant.
>>>
>>>What got me looking around was when I went to change the oil, the
plastic
>>>cap popped right off in my hand. The threaded ****tion is melted into
the
>>>inlet on the valve cover. We never noticed it running hot and I last
>>>checked the coolant about two months ago. I pulled the valve cover off
&
>>>luckily nothing got into the motor.
>>>
>>>Could the cover have melted becuase of a blown head gasket?
>>>
>>>Thanks!
>>
>> You say you 'just got' this vehicle. I'd suspect that the original
>> (previous) owner seriously overheated the engine. (Probably why he
>> sold it...)
>>
>> Were this my Jeep, I'd flush the coolant, and run it for a while and
>> see if there is additional oil getting into it. You may have simply a
>> case that the previous owner accidently put oil into the cooling
>> system by mistake, but that's hard to say.
>>
>> Next time you buy a used vehicle, have it inspected by a good mechanic
>> who would have spotted these problems. <sg>
>
>I'm a decent mechanic and I did check it out. Nice green coolant when I
>bought it, nothing suspicious in the overflow tank.
Well, you did miss the melted oil filler cap, right? <bg>
>
>Any chance this is tranny filud in the coolant?
Automatic? Absolutely possible... You'd probably also have coolant in
the transmission as well, check the ATF for contamination.
If it is ATF, then I'd suggest just replacing the existing radiator
unit with a seperate transmission cooler.
>Seems strange that there is
>no coolant in the crankcase.
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