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  Need Help. 2.8L fiero blowing white smoke. Intake or Head gasket?

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Need Help. 2.8L fiero blowing white smoke. Intake or Head gasket? by haro1
Started on: 03-31-2011 11:48 AM
Replies: 8
Last post by: Raydar on 03-31-2011 07:24 PM
haro1
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Report this Post03-31-2011 11:48 AM Click Here to See the Profile for haro1Send a Private Message to haro1Direct Link to This Post
I started the car up after putting it away in the fall to find it billowing white smoke out the tailpipes. I let it run for 5 minutes and it never let up, I did some searching on the net and did find one thing that I checked for and found was bubbles in the rad the bubbles were very small and did not seam to get ant worse with the engine under load (newtral rpms increased repidly a few times) any other Ideas that I might try that would determine the problem one way or the other.
Cheers: Jeff.
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haro1
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Report this Post03-31-2011 01:54 PM Click Here to See the Profile for haro1Send a Private Message to haro1Direct Link to This Post
I started it up again this morning and noticed the exhaust it be sweet smelling, oil is clean and no signes of loolant cap is clean, the coolant in the rad is bright green and light in colour, the rad cap apears clean with no sludge? I feel this just happened and has not been run enough to give the easy signes, I tryed to do a compression test on it but It apears I have misplaced my tester. I would like to think this is an intake gasket gone bad but if it were any other engine I would be only thinking head gasket failure.
Any insight here would be apreciated.
Cheers Jeff.
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JazzMan
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Report this Post03-31-2011 02:05 PM Click Here to See the Profile for JazzManSend a Private Message to JazzManDirect Link to This Post
Sweet smell and white smoke tells me coolant into the combustion chamber. My two guesses are blown head gasket or head/block crack. If it wasn't doing this when you put it up last fall and does it now, the only thing that changed was the cold, which makes me think freeze damage. Pull your plugs, the extra clean one will be the problem cylinder, then pull the head. Since pulling a head requires pulling the intake, if you find an intake problem while dismantling you can try fixing that first. Still smokes, then pull the head and inspect for cracks.

[This message has been edited by JazzMan (edited 03-31-2011).]

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jackkthorpe
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Report this Post03-31-2011 02:07 PM Click Here to See the Profile for jackkthorpeSend a Private Message to jackkthorpeDirect Link to This Post
It sounds like a head gasket. I would check the oil... It might look like chocolate milk...
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haro1
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Report this Post03-31-2011 02:47 PM Click Here to See the Profile for haro1Send a Private Message to haro1Direct Link to This Post
I looked at the frost plugs thinking the block may have froze, I found them to be ok, I tested the coolant last fall and it was good below -40*, It is looking like I may be into a motor swap sooner than later doesn't it.

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JazzMan
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Report this Post03-31-2011 03:34 PM Click Here to See the Profile for JazzManSend a Private Message to JazzManDirect Link to This Post
Work the problem step by step. Another place coolant can get into the combustion chamber is via the throttle body heater lines, but that would require some metal damage in the throttle body casting itself. I'd start off by seeing if the problem exists in just one cylinder or all of them first before proceeding.
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haro1
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Report this Post03-31-2011 04:20 PM Click Here to See the Profile for haro1Send a Private Message to haro1Direct Link to This Post
I have read about problems with 2.8, 3.l, 3.4l engines leaking coolant into the combustion chamber via the intake gasket. this is why I posted, I did find my compression tester, a buddy was holding it for me. I will do a compression test on monday.
Thanks: Jeff.
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JazzMan
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Report this Post03-31-2011 04:26 PM Click Here to See the Profile for JazzManSend a Private Message to JazzManDirect Link to This Post
IIRC that was early gen transverse 3.4 motors. The Fiero hasn't had any problems with intake gaskets, they're expected to last the life of the motor.
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Raydar
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Report this Post03-31-2011 07:24 PM Click Here to See the Profile for RaydarSend a Private Message to RaydarDirect Link to This Post
When I had a blown head gasket, a compression test didn't really find anything.
What really gave it away was when I connected my air compressor to the cylinder, using the compression tester fitting.
(No problem. Static compression is at ~135 lbs. The compressor is only about 120.)
When I connected the compressor to the leaky cylinder, I got a flurry of bubbles out of the thermostat housing.
If you want to try this, you'll have to rotate the engine to the compression stroke on each cylinder when you apply pressure.
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