Bad coolant cap (one way valve is working two ways) or you've got a slight exhaust gas leak into the system. Probably the cap from the description. Your otherwise good-working and well-designed cooling system is covering for you by keeping the temps normal for now. Jim
On Mon, Sep 9, 2013 at 6:17 AM, Richard Golen <rgolen@hotmail.com> wrote: > Dear List Members, > > Here's a coolant problem for you to ponder. Recently, on my 87 Westy, > after being driven on the highway for an hour or more, the overflow tank > gets completely filled. Sometimes, the coolant level is so high that > coolant sprays from the vent hole on the top of the tank. > > The tank slowly goes back to normal level if the van sits for a day or so, > or if I let it idle for a while after the engine is cooled down. > > While driving, the temp gauge is in its normal position. I've also bled > the system a couple of times using a "bong". > > Any ideas as to what could be causing this? > > Thanks in advance. > > Ric > Sent from my iPad |
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