After Y8 head swap..Overheats = smoke coming out from rad.

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Old Sep 13, 2002 | 08:19 AM
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Default After Y8 head swap..Overheats = smoke coming out from rad.

me and my friends swapped out heads..Y8 head on z6 block..everything went/fitted fine..cept we had to modify the distributor to make it fit.. (drill hole bigger). now it overheats..smoke comes out from the radiator. any ideas?..anyone had any problems like this after a head swap? we flushed the radiator several times..could it be..water pump, thermostat, rad cap, radiator or..the timing?? thanks for your help.


[Modified by RIPDC2, 5:21 PM 9/13/2002]
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Old Sep 13, 2002 | 09:17 AM
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Default Re: After Y8 head swap..Overheats = smoke coming out from rad. (RIPDC2)

ttt
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Old Sep 13, 2002 | 11:48 AM
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Default Re: After Y8 head swap..Overheats = smoke coming out from rad. (RIPDC2)

??? Smoke comes out of the radiator? Maybe you have a blockage in the coolant passages?
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Old Sep 15, 2002 | 04:26 PM
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Default Re: After Y8 head swap..Overheats = smoke coming out from rad. (89_Y_49RIP)

i just purchased a rebuilt radiator, i installed it but it still overheats...bought a new thermostat..but haven't installed yet....please give me some advice that will help me!
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Old Sep 15, 2002 | 04:29 PM
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Default Re: After Y8 head swap..Overheats = smoke coming out from rad. (RIPDC2)

what head bolts did you use?
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Old Sep 15, 2002 | 04:47 PM
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Default Re: After Y8 head swap..Overheats = smoke coming out from rad. (RIPDC2)

it was my understanding that if you use a y8 head on the z6 block, you wouldn't have to modify the distributor with the 4g civic/crx. correct me if i'm wrong, because i've never done this swap before. thanks.

cept we had to modify the distributor to make it fit.. (drill hole bigger).
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Old Sep 15, 2002 | 04:53 PM
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Default Re: After Y8 head swap..Overheats = smoke coming out from rad. (l0p3z)

your exactly right,only on the z6 head.
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Old Sep 15, 2002 | 05:41 PM
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Default Re: After Y8 head swap..Overheats = smoke coming out from rad. (4gvtec)

the y8 head is being slapped on a z6 block....the car is a 93 ex which originally had the d16z6 motor...


UPDATE: gonna replace the head gasket tomorrow...if it still overheats...gonna perform a compression test on the head...
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Old Sep 15, 2002 | 05:45 PM
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Default Re: After Y8 head swap..Overheats = smoke coming out from rad. (4gvtec)

what head bolts did you use?
does it matter what head bolts i used?.....i've never heard this before...well if it means anything..i used the bolts that was on the y8 head...tell me what this means..
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Old Sep 15, 2002 | 06:00 PM
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Default Re: After Y8 head swap..Overheats = smoke coming out from rad. (RIPDC2)

well i had a z6 block and a y8 head,actually a lot of d motor stuff.either one or two of the head bolts would not screw in all the way,z6 bolts had to be used.
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Old Sep 16, 2002 | 11:10 AM
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Default Re: After Y8 head swap..Overheats = smoke coming out from rad. (RIPDC2)

From past experience when smoke is coming from radiator like either near the radiator cap or reservior your looking at a head gasket problem. Basically the exhaust in the head is leaking into the coolant passages. Hope this helps.
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Old Sep 16, 2002 | 12:34 PM
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Default Re: After Y8 head swap..Overheats = smoke coming out from rad. (BigBank420)

Re-useing head bolts is not a good idea... Do this ONLY if you are on a realy tight budget. The old bolts will not get a proper torque. Usualy, useing the old ones will work, but if you are having problems like that right after swaping the head, your problem will most likely be the head bolts. Replace them with OEM factory ones or use ARP studs.

I don know about haveing to use the Z6 bolts but that would also make sense
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