I NEED coolant flow diagrams for the 3900

[Guest]

I'm about two days out from installing the engine and need to know coolant flow directions. The engine has a "U" flow pattern with inlet and outlet on the front of the engine, the thermostat is installed at what appears to be the pump housing inlet but it is facing in the opposite direction of traditional flow with the pintle end facing the inlet. Then there are the two lines that run along the valve cover to the throttlebody end.

You can see pictures of the hoses here,

http://www.fiero.nl/forum/Forum2/HTML/084972.html

The stat is behind the red plastic cap and it has an extended end that also covers a little hole in the back that apparently blocks coolant from going up to the top line.

[CNCguy]

Joseph... I made a drawing of the coolant flow from my observations. I am 99% sure of it's accuracy. For some reason they decided to restrict the coolant flow on the inlet instead of the outlet. I assume that is why the coolant fill is on the engine now.

[Joseph Upson]

Thanks, I assumed something along those lines after taking another look at it. Bzopi has been helping me with the FTP space but it's turning out to be more of a headache than I care to bother with.

I dragged and dropped a couple of pictures in Filezilla but I have no idea from there as to how they are to show up on the forum so for now I'll finish the thread on the Fiero forum and maybe post some pictures under my basic account here on the forum until I run out of space. I should be installing the engine tomorrow.

When windows started doing everything automatically I lost the computer knowledge I acquired years ago.

[IsaacHayes]

easy, just do the image tag and put in the URL to your image. Like http://yoursite.60degreev6.com/3900.jpg

To make website page put an index.htm file in your directory and put images in there. you can download some webeditor for that.

[bszopi]

I can't see anything in your webspace, so I dunno what the deal is. Email them to me and I will get them up.

[IsaacHayes]

You can make a short cut in network neighborhood too to connect to FTP and then just drag and drop your files instead of an FTP browser too.

[Joseph Upson]

Joseph... I made a drawing of the coolant flow from my observations. I am 99% sure of it's accuracy. For some reason they decided to restrict the coolant flow on the inlet instead of the outlet. I assume that is why the coolant fill is on the engine now.

Thanks again CNC, do you see a problem with removing the stock thermostat and finding a vintage replacement that does not cover the heater core inlet so that it circulates at all times since my turbo coolant flow will be from the same lines? I also want to run a 160 to 180 degree thermostat for better cooling since I have a small radiator at the moment, that's another reason for the old style thermostat.

[CNCguy]

It should work fine but you will be pushing coolant through the turbos that has already been heated by the engine. The only other issue would be a reduced amount of flow to your heater core.

If you want to keep the turbos cooler, an alternative would be to tap into the front cover between the pump and front of the block. That would feed fresh coolant to the turbos and the return lines could feed back into the 3/4" hose.