3500 in a P'up

[Canyonero]

Well, I'll be picking up an LX9 for my Trooper tomorrow. This should be interesting.

[Google Adsense]

[lilredtruck]

Basic question: What is the purpose of the water piping between the thermostat housing and the water pump on the LX9. Is it necessary?

[Joseph Upson]

I vaguely remember what it looks like but if it's anything like the 3900 in its purpose it's required to circulate hot coolant over the thermostat so that it limits how hot the engine gets before it opens. Without a recirculation of hot coolant from the outlet at the end of the heads back down to the water pump housing where the thermostat is located the 3900 would overheat and self destruct.

[lilredtruck]

Next question. I just purchased a crank pulley from a '94 Cavalier, expecting to see some kind of timing ring on the inside of the pulley something like what WOT sells, to trigger the crank sensor which mounts on the front cover. Nothing visible. Is it magnetic? I didn't get any response from a nail held close to the pulley as I moved around the inside face.