D16z6 with D15b7 IM, coolant flow problem

General engine questions/issues that aren't specific to the other categories
 Reply
User avatar

D16z6 with D15b7 IM, coolant flow problem

By eghatch27
- Mon Sep 15, 2008 1:43 am #69776 I swapped to a D16z6, and just kept my D15b7 IM on there. I have CEL 14, Idea Air Control Valve. I replaced the unit, and reset the ECU and still had the code. I was told that the D16z6 had to have a "T" fitting for the coolant lines from the IAC, under the TB, and the block. I connected them like this... line from the head into the "T". Line from the IAC into the "T". Line from the TB into the "T".

I think I have something mixed up, or i just need different fittings to make it flow better. I was wounding if anyone had any diagrams of how the flow goes.
User avatar

By teal_dx
- Mon Sep 15, 2008 2:03 am #69780 Any way you can get a z6 intake manifold? they aren't too expensive and they are less restrictive & would solve your problem.

Without seeing your actual engine, it is hard to tell how you will need to route the coolant line. But I believe it should come out of the water pipe by the tranny side of the block, then to the Fast Idle Thermal Valve under throttle body (some models do not have one, but still have the nipples for the hose to pass through), then to the IACV, then back into the other side of the water pipe, by the alternator side.
User avatar

By eghatch27
- Tue Sep 16, 2008 11:40 pm #70099 I have a d16z6 IAC (I dont even know why i got this one, considering that I have a D15b7 IM :? )

I took some pics of the problem:
http://i19.photobucket.com/albums/b179/ ... Y04603.jpg
(huge pic)

I think the line under the TB goes into the IAC. But idk where the line on the right goes to

Thanks a lot
User avatar

By teal_dx
- Wed Sep 17, 2008 12:19 am #70105 yeah the line on the right I do not know about either... I'll look through some of my old pics and see if I can find it. my car is not here right now or I would go out and pop the hood
User avatar

By eghatch27
- Wed Sep 17, 2008 12:23 am #70107 alright man, thank you. I need my car for tomorrow lol
User avatar

By teal_dx
- Wed Sep 17, 2008 12:42 am #70108 the d15b7 and d16z6 IM's both have that nipple facing straight up that you have circled in the pic.

http://civic-eg.com/viewtopic.php?t=3340

edit: the line that originally came out of that nipple on the right in your pic went into a metal tube that was joined with another metal tube parallel that went from the valve cover to the intake tube. However, I can't tell what that coolant line went to after it left the other side of that metal tube. :?
User avatar

By eghatch27
- Wed Sep 17, 2008 1:20 am #70113 thanks for showing me the comparison thread, didn't find that before.

U think its possible to "T" on the other side of the IAC?
User avatar

By teal_dx
- Wed Sep 17, 2008 1:57 am #70115 I would try it in different places and see what happens, or maybe switch the hoses around coming out of the engine. maybe you have coolant trying to flow from the wrong hose.
User avatar

By suspendedHatch
- Thu Sep 18, 2008 1:12 am #70250 That's not your problem. I bypassed that coolant completely, sealed it up with a thick piece of sheet metal and a paper gasket. Never threw a code or caused any problems.
User avatar

By eghatch27
- Thu Sep 18, 2008 5:05 am #70278
suspendedHatch wrote:That's not your problem. I bypassed that coolant completely, sealed it up with a thick piece of sheet metal and a paper gasket. Never threw a code or caused any problems.


u talking about the IAC?

right now i just capped off the line coming out of the block (i dont think thats the greatest thing to do but if i can make it to school then whatever). I'm taking into class tomorrow and have some of my instructors look at it.
User avatar

By teal_dx
- Thu Sep 18, 2008 6:30 pm #70345
eghatch27 wrote:http://i19.photobucket.com/albums/b179/RemzRoller27/coolinghosesallenbolt00xn3.jpg

think its something like this?


yeah that looks fine to me, I did something similar when I put a y8 head/IM on my d15b7 block.
User avatar

By suspendedHatch
- Fri Sep 19, 2008 3:45 am #70474
eghatch27 wrote:
suspendedHatch wrote:That's not your problem. I bypassed that coolant completely, sealed it up with a thick piece of sheet metal and a paper gasket. Never threw a code or caused any problems.


u talking about the IAC?

right now i just capped off the line coming out of the block (i dont think thats the greatest thing to do but if i can make it to school then whatever). I'm taking into class tomorrow and have some of my instructors look at it.


No I'm talking about the FITV. There's coolant going from the intake manifold to the FITV to the IACV to the back of the block above the alternator. You can simply loop this line to the line out of the intake manifold, plug the FITV, and pick up a couple hp and a couple mpg.

The line you blocked I'm pretty sure by your description is the one going either to the heater or to the thermostat.
 Reply
Return to Engine - General