d16a6 weird cooling system problem

[BiG ChOr!Zo]

Originally Posted by N3va3vaSatisfi3d The ZC looks the same as a D16A6, which also looks the same as a D15B2 head; basically all non-VTECs look alike. x2

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[BiG ChOr!Zo]

HEAD CODE STAMP DIFFERENCES:

D15B2
90 LX D15B2 5sp--------------PM3-9 (9/0) stamped rs of code
91 DX D15b2 5sp---------------PM8-12
93 EG4(EDM) D15B2 5sp-------PM3-8 (9/4) stamp

D16A6
88 RT D16A6 Auto------PM3-7
90 Si 5spd---------------PM3-1
90 Si D16A6 5sp--------PM3-4

ZC SOHC
88-91 ZC SOHC--------PM3-3

[BiG ChOr!Zo]

did you have some 90-91 ef sedan front mudflaps for sale or trade by the way...!!!

[4g4dcruisin]

Originally Posted by BiG ChOr!Zo

did you have some 90-91 ef sedan front mudflaps for sale or trade by the way...!!!

yes i do, trimmed a little bit for someone riding dumped...still decent shape tho.

[BiG ChOr!Zo]

how did your head workout...!!!

[4g4dcruisin]

Originally Posted by BiG ChOr!Zo

how did your head workout...!!!

dont know yet, i was getting crap by the gf at home to chill with the kids instead of work on the car...but after she fell asleep i went out and put on my detachable wheel haha

[BiG ChOr!Zo]

nice...gotta love them gf mood swings...well hopefully your head aint cracked but if you still need mine ill knock off a 20 sack from the 80 ball and you can give me them front ef sedan mudflaps

[4g4dcruisin]

Originally Posted by BiG ChOr!Zo

nice...gotta love them gf mood swings...well hopefully your head aint cracked but if you still need mine ill knock off a 20 sack from the 80 ball and you can give me them front ef sedan mudflaps

coo, appreciate that but hopefully it wont happen...say the head was cracked, wouldnt i have some other leaking issues besides just water in the pistons? cuz nothing leaked on the outside of the head/block.

[BiG ChOr!Zo]

i wouldn't have any clue on how to tell if the head was bad...!!!

[4g4dcruisin]

i dont think it is, cuz it will fire up and it runs normal with the exception of boggin out eventually cuz the water.

[BiG ChOr!Zo]

might of just been the headgasket and a faulty water pump but who knows...!!!

[4g4dcruisin]

yea, this week has blown cuz im so curious to work on the shit but i cant until tomorrow since its my day off!!

[4g4dcruisin]

alright this is getting stupid..i switched out the head with another just as a precaution, new headgasket...and it STILL does the same thing as before. air is BLOWING thru the roverflow tank.

[4g4dcruisin]

possible solution to my air bubble problem...forgot about the O ring that went on the water pipe between the thermo housing and the water pump! it could have fallen off when i replaced the pump but who knows.

[N3va3vaSatisfi3d]

Originally Posted by BiG ChOr!Zo

i wouldn't have any clue on how to tell if the head was bad...!!!

I do.

Originally Posted by 4g4dcruisin

alright this is getting stupid..i switched out the head with another just as a precaution, new headgasket...and it STILL does the same thing as before. air is BLOWING thru the roverflow tank.

Did you check your block to make sure it was straight? Also, did you look at the cylinder walls to see if they were cracked?

Originally Posted by 4g4dcruisin

possible solution to my air bubble problem...forgot about the O ring that went on the water pipe between the thermo housing and the water pump! it could have fallen off when i replaced the pump but who knows.

Negative. That would not cause your problem. You have to remember, air is coming out through the reservoir from PRESSURE. Positive Pressure would NOT be created by a leaking seal on the housing.

I would get a leak down tester and try to seal the deal on exactly where it is leaking. Either that or you can do it the CHEAP ass way and just put air into the cylinder. Make sure you limit it to about 100 PSI. When you do this then make sure your valve cover cap, dipstick, coolant cap, and intake piping are all off when you do this so you can pinpoint ALL of the areas it is leaking out of.

[4g4dcruisin]

Originally Posted by N3va3vaSatisfi3d

I do.



Did you check your block to make sure it was straight? Also, did you look at the cylinder walls to see if they were cracked?



Negative. That would not cause your problem. You have to remember, air is coming out through the reservoir from PRESSURE. Positive Pressure would NOT be created by a leaking seal on the housing.

I would get a leak down tester and try to seal the deal on exactly where it is leaking. Either that or you can do it the CHEAP ass way and just put air into the cylinder. Make sure you limit it to about 100 PSI. When you do this then make sure your valve cover cap, dipstick, coolant cap, and intake piping are all off when you do this so you can pinpoint ALL of the areas it is leaking out of.

update!

i did a pressure test, i've read that you put compressed air into each cylinder and let it blow! i removed one spark plug at a time and i couldnt hear any air escaping anywhere or bubbling in the overflow.

i lowered the amount of coolant (i had it too high) in the overflow and it bubbles still but doesnt overflow. also noticed that the overflow cap is faulty, tilted it sideways and the coolant leaked.

im gonna focus on my a6 head which is OUT of the car...this is the head that the car had the problems with. i have an unknown zc head on the car now. the oil did NOT look like this with the a6 head before i changed the headgasket.

the straight edge was good for the a6 head, that shit was straight, more than likely i just blew that gasket. but now with this zc head, who the hell knows.