Coolant line question for a mix and Mach engine

[daveyj]

I’ve just finished a turbocoupe swap into my CJ3B ( hopefully that’s allowed)
But I’ve run into a snag that I’m looking for help with

Originally I had a n/a 2.3, found a long block from a 87 turbocoupe, including the ihi turbo.
Installed using the accessories from the 2.3, I’m using the sniper 2300 I had on my original engine. One of the things I didn’t like was the heated manifold, so I blanked it off. ( colder is better right?)
Unfortunately it seems like I’m not getting coolant flow to my heater. I’m running lines from the thermostat housing to one side of the heater core, and water pump line to the other. Water cooling lines are teed into these.
In theory it should work, but in practice no. I can’t seem to tell if it’s short circuiting between the turbo, or if it’s because of the thermostat not allowing coolant flow or? I’m open to installing the other intake I have if that’s the only way to make it work but that would be my last resort. I do drive it in the winter a fair amount , and a heater is needed for that. Couple pics of it not quite done here : imgur.com/a/unnilJ4 thanks in advance
Dave

[Stinger]

stinger-performance.proboards.com/thread/18/where-coolant-lines

How much of that is eliminated? You mentioned the coolant port in the intake (and associated line), what about the oil cooler/heater? Turbo lines?

[daveyj]

Pretty much everything has been pulled , on the post you linked, I have the yellow and blue lines running to the heater core, turbo coolant lines are teed between those. Basically from the heater outlet on the thermostat housing to the core, and the water pump heater line outlet to the other side of the core.


Edit: I think i may have an early thermostat installed, it doesn’t have the two offset tabs like the proper one does.

[Stinger]

Have you felt the hoses when it's up to temp to verify the lines are hot and pressurized? No air pocket in the core?

[daveyj]

Yup, pulled my heater out and dropped it onto the floor, bled the lines. Hoses were pressurized. There was some air but I’m pretty sure I got it all out. ( one advantage to having an old Jeep, it’s a separate heater box. )
One line is warm, but not super hot, one cold. It almost seems like there isn’t any flow through the lines
It’s got me puzzled

[Stinger]

You're positive the thermostat is opening all the way? If it was just cracked open when hot (or leaking all the time) then it would act that way.

[daveyj]

Engine is coming up to temperature, and electric fan is cycling like it should, on at 205, off at 185. To be honest, I’m not sure if the thermostat is opening all the way or not, it’s about-5 Celsius outside, it may be only partially opening. Temp is from the sniper sensor in the block below the oil lines in the head.
Maybe I’ll try a new thermostat, it’s a pretty cheap part

[daveyj]

This is the thermostat I bought, but I notice now that there a re two different types listed for the turbocoupe, did I grab the wrong one ? imgur.com/a/9AXdUcQ

[Stinger]

It depends on which type of thermostat housing you have. Main thing is to just verify that it will fully seat and seal in the housing. The other type has two tabs that lock down in a groove in the housing.

[daveyj]

I’m going to pull it out today and check, I want to replace the upper rad hose anyways. I’ll report back after.
Thanks for the help

[daveyj]

Well, it was the thermostat blocking most of the flow. I should have been more careful choosing my parts and a little less trusting of Rock Autos part listing. 🧐

I took a couple pics of the wrong combination I had , maybe it will help someone in the future.
Thanks for talking me through it, it really did help

imgur.com/a/vCRyCSd

[Stinger]

That will do it! Glad we were able to assist in solving the problem.

[turbochallenged]

So the tabbed thermostat was the one that solved the problem?

[daveyj]

So far it has, the solid type thermostat was almost completely blocking the heater hose outlet. The tabbed one spaces the thermostat out , so coolant can flow through it.

[turbochallenged]

Thanks. Good to know.