69 C20 - 350 Smoking ??? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

gt40racing · 11-29-2014, 01:44 PM

Okay I bought this C-20 this week for a good price. Motor is smoking. Smoke is white smells like oil.... thoughts?

http://whittz.com/v-web/gallery/Chevy

trac209 · 11-29-2014, 02:36 PM

Usually white smoke means a blown head gasket. But most times the exhaust will smell like coolant. Check oil and coolant for signs of cross contamination.

mattybilt79 · 11-29-2014, 05:23 PM

Valve seals could be bad if it smokes when you first start it but mostly goes away after it warms up. Could be rings. Hard to say how worn motor is from the outside unless you do compression test.

11-29-2014, 01:44 PM	#1
gt40racing Registered User Join Date: Dec 2012 Location: Lompoc CA Posts: 118	69 C20 - 350 Smoking ??? Okay I bought this C-20 this week for a good price. Motor is smoking. Smoke is white smells like oil.... thoughts? http://whittz.com/v-web/gallery/Chevy Last edited by gt40racing; 11-29-2014 at 01:50 PM.

11-29-2014, 02:36 PM	#2
trac209 Registered User Join Date: Dec 2011 Location: winnipeg Posts: 1,107	Re: 69 C20 - 350 Smoking ??? Usually white smoke means a blown head gasket. But most times the exhaust will smell like coolant. Check oil and coolant for signs of cross contamination.

11-29-2014, 05:23 PM	#3
mattybilt79 Registered User Join Date: Nov 2014 Location: Arizona mostly Posts: 114	Re: 69 C20 - 350 Smoking ??? Valve seals could be bad if it smokes when you first start it but mostly goes away after it warms up. Could be rings. Hard to say how worn motor is from the outside unless you do compression test.



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