Dohc zc motor problem diagnosis help needed!
10-03-2011, 07:59 AM
#1
Honda-Tech Member
Thread Starter
Dohc zc motor problem diagnosis help needed!
Hello, I'm having a problem with my zc motor and was wondering if anyone had an opinion on it.
First off its a 1990 y49(reason why the problem exists) with a Dohc zc running the stock si ecu. The problem I'm having is that it white smokes, and only when it wants to. I can be driving along and it will do it constantly real lightly but persistant. Or it wont be doing it at all and I can come to a stop and i see a huge white cloud roll past the front of my car. It also has alot of condensation when its cold outside 45 degrees and continues even when the car is warm.
It is NOT loosing coolant, if it is it cannot be very much and I didnt think a droplet size of coolant could cause all that smoke.
I also looked in the overflow and it has coolant in it, it is green but the inside is coated with a milky brownish slime. Also I removed the radiator cap and it had a white milky substance floating through it and disappeared within seconds. Kinda looked like oil and water mixed together type of texture.
It is loosing oil, but the smoke is white! It looses about a quart every other week. And i do not smell burning oil at all. Can someone diagnose this with a for sure answer, I've narrowed it down to a leaky headgasket or intake mani gasket.
Thanks for reading.
First off its a 1990 y49(reason why the problem exists) with a Dohc zc running the stock si ecu. The problem I'm having is that it white smokes, and only when it wants to. I can be driving along and it will do it constantly real lightly but persistant. Or it wont be doing it at all and I can come to a stop and i see a huge white cloud roll past the front of my car. It also has alot of condensation when its cold outside 45 degrees and continues even when the car is warm.
It is NOT loosing coolant, if it is it cannot be very much and I didnt think a droplet size of coolant could cause all that smoke.
I also looked in the overflow and it has coolant in it, it is green but the inside is coated with a milky brownish slime. Also I removed the radiator cap and it had a white milky substance floating through it and disappeared within seconds. Kinda looked like oil and water mixed together type of texture.
It is loosing oil, but the smoke is white! It looses about a quart every other week. And i do not smell burning oil at all. Can someone diagnose this with a for sure answer, I've narrowed it down to a leaky headgasket or intake mani gasket.
Thanks for reading.
10-03-2011, 08:25 AM
#2
DO IT ON ALL FOURS
Re: Dohc zc motor problem diagnosis help needed!
Blown headgasket or the likes... if you don't want to believe it then do a leak-down test or at least a compression check.
10-03-2011, 09:26 AM
#3
Honda-Tech Member
Thread Starter
Re: Dohc zc motor problem diagnosis help needed!
here is a video, don't mind the sound I took it with my phone.
http://youtu.be/GOridOJSZ1o
http://youtu.be/GOridOJSZ1o
10-03-2011, 02:16 PM
#5
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Re: Dohc zc motor problem diagnosis help needed!
Right around 0:21 it looks like blue smoke rather than white.
That would be oil.
Have you ran the engine for a while, shut it off, and then removed the oil cap to see what it looked like in there?
Compression and leak down test like N3va3vaSatisfi3d suggested.
Might want to add a block test to it as well to see if you have any traces of exhaust gases in your water.
That would be oil.
Have you ran the engine for a while, shut it off, and then removed the oil cap to see what it looked like in there?
Compression and leak down test like N3va3vaSatisfi3d suggested.
Might want to add a block test to it as well to see if you have any traces of exhaust gases in your water.
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