Conrad D. Conelrad
Member
When my car was laid up 34 years prior to me finding it the owner filled the tank. I think there was still a good jerry can and a half still in it. The bottom of the tank and the lines and fuel pump were blocked with tar. To cut a long story short, I had to change the tank, I tried every thing to clean it, I wish I had scrapped all the lines too, they gave me weeks of trouble.
The tar would set hard as soon as it had contact with air, Acetone was the only stuff that dissolved it.
It was a nightmare.
I have also encountered the dreaded tank full of tar, albeit not on a P6. This from a car that was laid up in 1998:
I took it to a radiator specialist, who sorted it out quite cheaply. Although he said a P6 tank would be more work because of the baffles.