Heater bypass....

[Desi]

Ok, so I am having a Major overheating issue.. I am having to bypass the heater, but after this latest icident, I am thinking I may have the bypass hoses wrong. As it dits, I gave the top line on the pump going to the water-neck, and the intake is routed to the lower.. is this backwards? Anyone have a good pic. of how the bypass should be hooked up?

[Ltngdrvr]

The bypass hose usually goes to the upper pipe on the pump but it shouldn't make any difference. Both of those pipes on the pump are inlets.

[JACook]

It would be really hard to get this wrong. The molded bypass hose won't reach
over to the wrong fitting unless maybe if you're a gorilla. And like lightning says,
it really doesn't matter.

You've got 'em right.

[Desi]

Crap... was hoping this would be it. New waterpump & thermostat, & as soon as it gets to temp it bolts right on up.. I thought about having a block test run on it to see if it's got a headgasket leak, but was wanting to hold off on that.

[negusm]

Are you using the stock gauge to measure temperature?

Get another gauge if you can.

-Mike

[negusm]

How old is the radiator?

-Mike

[JACook]

Were you having overheating problems before you replaced the water pump
and thermostat?

[Desi]

Radiator is out of an '88 t-bird (same car thte motor came from) only diff was the bird had an AOD, & was fuel injected. My radiator is full of crap, thats why I did the motorswap on it.. had oil in the old coolant system, & yes, stock gauge, but the boiling over the cap & blowing the hose off tells me it's not the gauge.

[negusm]

So a 20 year old radiator? That's probably been siting for 10 years?

I would suspect either the clutch or the radiator then.

-Mike

[Desi]

So a 20 year old radiator? That's probably been siting for 10 years?

I would suspect either the clutch or the radiator then.

-Mike

Well.. when ya put it that way.. I'm not sure how long the bird was sitting since it was last driven, not more than a year tops, but no telling on it..thats where I am starting, at least. & I assume we are talking the fan clutch?

[Ltngdrvr]

Fan clutch test is easy, get the car fully up to temp, shut it off and grab the fan blade and try and turn it. It should be very tight to turn, if it turns relatively easy then it's no good.

[Desi]

Ahh, gotcha.. I am really wanting to move to an electric fan, but havent looked to hard in to the Alt. upgrade process..I understand I'd have to do that really before an elect. fan would be feasible.

[Ltngdrvr]

Ahh, gotcha.. I am really wanting to move to an electric fan, but havent looked to hard in to the Alt. upgrade process..I understand I'd have to do that really before an elect. fan would be feasible.

Depends on which fan you want to go with. If you pony up the bucks to go with the latest flexalite mustang fan, they only pull about 18 amps which the stock alternator should be able to handle.

[Ductape91]

you never clarified wether or not it was overheating before you replaced the waterpump/thermo.
did you test the thermostat to see if it was bad?
what brand thermostat did you get?
"stant" thermostats fail right out of the box

easier way to check the fan clutch is to spin the copper element thingy on the front around 180o. that disables the clutch and makes the fan solid. if it runs cooler your fan clutch is bad.

[Desi]

you never clarified wether or not it was overheating before you replaced the waterpump/thermo.
did you test the thermostat to see if it was bad?
what brand thermostat did you get?
"stant" thermostats fail right out of the box

easier way to check the fan clutch is to spin the copper element thingy on the front around 180o. that disables the clutch and makes the fan solid. if it runs cooler your fan clutch is bad.

Not sure if it was or not, to be honest...the motor ran when we pulled it but dont really have a history on it, I DO know the old pump had been rebuilt, but had to replace the timing cover so decided it was a good idea to do the pump & themos. while we had it apart. And for thermostat I went with a mr. gasket, dont have the pt# at the moment, but I know it's opening & aloweing flow. I also discovered "several" holes on the radiator since I last posted...