kelley5795

Okay I have a 1992 Lexus LS400 head gaskets blew so I just got new head gaskets and got everything fixed And When it ideals it runs up to 4000RPM then it goes back down to 1500RPM it ideals up then it dies if I don't keep my foot on the gas and after 15 mins It starts blowing steam out the PCV valve But its not blowing steam any other place And it starts to get really hot And oil dip stick is still clean no milky look So whats wrong?

willhickey

iTrader: (1)

Is there coolant in there? is the thermostat stuck ? I would do a coolant pressure test on it to try to find a leak in case there is one that would make it run hot ... Did you resurface the heads since they were overheated in the past ? , if not it could possiblyblow another headgasket in the future and lastly you must have a vacuum leak for it to idle like that look for disconnected hoses my money is on there is a important one unhooked or craked. GOODLUCK

kelley5795

Yes its filled with Coolant and No the thermostat is not stuck and yes the heads were milled And It only over heated one time and thats when the head gaskets blew Would the intake leak make the car run hot? And Would have putting the old head bolts back on make the car run bad? I torqued them to 29FT-IBF Like the Lexus Book said to do But A bolt is a bolt to me I would think as long as it Was a good bolt But that still don't tell me why steam like air come from the PCV?: I'm out of ideas

willhickey

iTrader: (1)

they are torque to yield bolts maybe ........ what i do is lay them all out next to eachother and see if only are longer than the other , if they are they have stretched and they have lost their clamping force..

willhickey

iTrader: (1)

me too im stumped bud has it spit out any coolant etc...?