Red97tib Posted November 10, 2015 Share Posted November 10, 2015 So here is a quick rundown. I am working on my neighbors '04 Expedition with a 5.4L 2 valve motor. Car came in and would randomly overheat, exhaust looked like a steam engine, and water would run out of the exhaust. I assumed head gasket. I tore the hole thing down. I didn't see any cracks or marks in the block or heads to indicate an area of damage. The heads had a flatness of 0.0026" and 0.0023" overall max. I assumed that was within spec. I replaced all the gaskets with new and one of the timing tensonors. New plugs and checked all the coil packs. Replaced the fluids and restarted the thing. The exhaust looks like a fog machine still. The interior vents only blow cold so I assume plugged heater core or lines. (I didn't check that prior to the rebuild). I let it run for a while but it still looks like a fog machine but I didn't let it overheat or give it a chance to. I let it idle for about 15 minutes. Water is obviously still running out of the exhaust. So did I miss something here? Could the water jackets be plugged and causing a problem? Could I have a cracked block or heads? I'm going to do a compression test when I get a chance but any ideas would be awesome. Greg Quote Link to comment Share on other sites More sharing options...
Red97tib Posted November 12, 2015 Author Share Posted November 12, 2015 So turned out that there was excessive water in the exhuast system. After running at idle for more than an hour this went away. O2 sensors were fouled due to the water but as the water left the exhuast the O2 readings became better. Car runs fine now. 2 Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.