Join Date: Aug 2001
Location: Lawrenceville, PA, USA
I have a 79 Z28 with a rebuilt 350. The car has been sitting for about 10 years. I got it out of storage this summer to do body work. The motor has no street time on it, only initial break in, tuning, and idle time, maybe 15 hours total over the past 10 years.
I changed the oil when I got it out of storage. The old oil looked fine. Now the car has been sitting for about 3 months without being run. The oil is a light gray in color and has a gas odor. My radiator is low too.
When I checked the oil dipstick I noticed the odd color of the oil. I then checked the radiator and noticed it was low. So I assumed water/coolant in the oil.
The car has been sitting for a few months without being run (I was doing body work) so I figured the water would probably have separated out and be on the bottom of the pan. So I drained about 1 cup of oil out of the oil pan. It smells of gas and is very light gray in color.
Any ideas? I have a Holley Blue electric fuel pump, a Holley 4bbl with vac. secondaries and dual feed.
Could the fuel have leaked out of the carb and into the oil?
Would fuel in the oil give it this color?
How about the color with antifreeze?
Where would antifreeze come from? Cracked block (I hope not)? Head gasket? Intake gasket?
How would I troubleshoot this?
If it's fuel would it most likely be the carb leaking fuel out of the bowls when sitting? The carb has been on the car for 10 years. It was rebuilt with a Holley trick kit but that was 10 years ago, so it's possible the gaskets have dried up.