Question about running no heater core

[Colt4G63 also]

And are the heater hoses on opposite sides of the thermostat?

Yes, water flows out of the head, through the heater core, and is sucked into the front water pipe, through the water pump, into the block, and back to the cylinder head.

If you block the bypass, you get erratic themostat cycling, and uneven heating of the engine, most likely some boiling/vapor in the head, and reportedly exessive water pump failure.

I don't see why it would be so bad to run a 3" long 5/8" diameter U shaped pipe straight down off the back of the thermostat housing, and down to the water pipe that runs directly underneath it. Would it even be that noticeable?

I see really nice V-8 cars with a coolant bypass hose sitting right in front where everyone can see it, and nobody says boo.

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[91stocker]

I appreciate your post but what exactly does that have to do with what I'm asking?

Thats exactly what your trying to accomplish is it not?

Just cap them, plug them with a bolt, or weld them smooth. If you take another look at your tstat you will notice the lines for the heater core are underneath the tstat. So...

Also if you would have read a little further down, post #26 to be exact, you would get a little more in depth info on exactly what you are trying to do.

Another thing is a quick search brought up this:
http://www.dsmtuners.com/forums/bolt-tech/423296-water-pipe-heater-core-line-delete.html

It seems everything you would need to know i have now linked to you in those last two links. Matter of fact my first link is linked in the second link haha.

Picture a closed coolant system, with no heater core or lines. When the engine is cold, the thermostat is closed obviously. Now there's a water pump trying to circulate water through the cooling system. It gets to the closed thermostat, and there's no where for the coolant to go, so it builds up pressure, and blows out the seals in the water pump.

The only time the tstat will be completely closed is on first start up of a cold engine. So that happens on every cold start up and doesnt kill water pumps. Also cold coolant and a low idling motoring is not going to create that much pressure. The pressure comes with the heat.

Like I mentioned previously, as have others, my friend lost 3 water pumps within a months time conveniently right after he blocked off the heater core lines, I'd like to say that's not a coincidence.

Ebay water pumps? Id say tstat stuck closed but he would have overheated first. Improper installation or cheap ebay water pumps maybe?

 

[Colt4G63 also]

^^ He makes a good point, it really shouldn't make a difference capping them, as long as the correct size holes are drilled in the thermostat. It should provide the needed flow during closed thermostat operation, but not flow so much that the engine can't warm up.

However, it still would increase warmup times, because the coolant would be traveling through the radiator instead of the heater core, but that's not something to go back to the drawing board over.

 

[EclipseOwner95]

Thanks for the responses. I'm just going to drill a few more relief holes in the T-stat and call it a day.