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Message: <blockquote data-quote="The Harbinger" data-source="post: 363531" data-attributes="member: 3243">Just got the head gasget replaced in my 94 toyota. Other than the milky color, and a mayonaise like substance on the bottom side of your oil cap, you can have irratic idling, loss of power, and a few other vague problems. If there are no puddles underneath your vehicle and you are losing coolant, that *might* be the problem. Hopefully it is the hose though, and you will not see any more collant loss.A mechanic can pressure test your engine by running an instrument through your radiator bottom - if it comes down to it. That should give you a firm diagnosis if you need it later. Of note though, it my toyota - I'd lost a few timing chain guides and my chain had come a little loose, causing it to continually tap the timing chain cover and eventually poke a hole in it - therefore allowing coolant to enter the oil. So I ended up getting both the chain and gasget replaced. While this is a pretty rare problem, its worth noting. As for the oil pressure loss...I'm at a loss.</blockquote>