o.k. first a few simple ideas. have you cleaned the radiator out?? take the upper and lower hoses off and flush water thru the radiator. then take a hose and flush thru the radiator to clear out bugs and road debris. you are using a 50/50 mix of good antifreeze?? see if your local auto parts store has a cooling system pressure tester. put that on where your radiator cap goes, start the van and watch the gauge as the van warms up.
if it climbs over 17 lbs you may have a head gasket issue.

Answered by johnsgarage99
0 questions asked

if pressure test fails head gasket sealer may fix it. cheaper than engine dis-assembly.

Answered by fixitmr
24 questions asked

regrouped could this be a bad cooling fan relay? the fans work when in park or at a low rpm. Could fan speed be a problem at higher speeds with the a/c on?

Response from kohllink
30 questions asked

fans need to be on high speed with air on.

Answered by fixitmr
24 questions asked

Just took the van for a ride till it got hot. the radiator cap was not hot and the top hose was rock hard like the thermostat was closed. Could it be a bad thermostat? I replaced the thermostat. Might of gotten a defective one.

Response from kohllink
30 questions asked

just remove it/drive it and see how it goes.

Answered by fixitmr
24 questions asked

removed the thermostat and drove for 30 minutes with the air on and the highest temp reading on the gauge was about 3/4 up. It usually runs at about the halfway mark.

Response from kohllink
30 questions asked