The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post - What would cause a float to split open and deteriorate so soon?

**gordyzx9r** · 08-07-2018, 11:08 AM

Two years ago I replaced the sending unit in the 1970 C10.

Recently, the gauge stopped working and after troubleshooting figured out the float had literally split open and peeled like a banana. See the pic of the old and new sending units side by side for a comparison.

I had ordered a new sending unit just in case...

So, install the new stuff and test it, works fine. Go about working on a few other things with the truck for a couple of days and start the truck and fuel gauge has stopped working again.

I pull the sending unit and the shiny brand new float is now completely stripped and you can just see where it has split along the seam after just a couple of days.

What the heck would cause that?

I use Marathon, 90 octane, ethanol free gas with K100 additive fuel treatment.

08-07-2018, 11:08 AM	#1
gordyzx9r Junior Member Join Date: Jul 2005 Location: Alabama Posts: 87	What would cause a float to split open and deteriorate so soon? Two years ago I replaced the sending unit in the 1970 C10. Recently, the gauge stopped working and after troubleshooting figured out the float had literally split open and peeled like a banana. See the pic of the old and new sending units side by side for a comparison. I had ordered a new sending unit just in case... So, install the new stuff and test it, works fine. Go about working on a few other things with the truck for a couple of days and start the truck and fuel gauge has stopped working again. I pull the sending unit and the shiny brand new float is now completely stripped and you can just see where it has split along the seam after just a couple of days. What the heck would cause that? I use Marathon, 90 octane, ethanol free gas with K100 additive fuel treatment. Attached Images __________________ 1987 Buick Grand National Last edited by gordyzx9r; 08-07-2018 at 11:13 AM.