1987 Saddle Tanks

Cheekster96 · February 6, 2006

Howdy gang. Well, i think the Maine winters are slowly starting to catch up to my 87 K20. My passenger gas tank is leaking fuel. Have a nice black stain in the asphalt out in the parking lot. Filled up that tank last week (driving on the drivers tank), noticed the puddle this morning, looked at the gauge and was down to an 1/8th.

I have seen prices for the 20 gallon (steel tank...will rust again eventually) anywhere between $90-140 from internet sites (spectra premium is a good place) to local parts stores. Auto zone wants $140. All of these tanks come with a new lock ring and o ring.

What about the polyurathane tanks? Same dimensions. Same 20 gallons. Never will rust. Wont accumulate condensation. They are slightly more expensive but seem to be worth it.

Any pros and cons or suggestions?

Also. The sending unit. Not sure if i need a new one (pricey, well over $200). The gauge works fine, the diverter valve (to switch tanks) works fine and the fuel pump runs fine. How do i determine if i need a new one or not?

Definately getting two new straps to go with the purchase.

Just wanted to see what you all had to say.

Truck is an 87 K20 with the 350 TBI, 4x4 and 4.10s with the TH400

Thanks.

Lee

Daubs · March 21, 2006

I used to own an 87 K-20HD. Loved that truck and wish I still had it. But traded for 99 lease...then got 01...now have 04 HD Crew Cab with the Big Block. So I guess I did right.

Anyway, I'd opt for the polyurathane tanks. They are poly in the new trucks and I'm thinking if you ever got t-boned the steel tanks would be more apt to rupture and do bad things to you and passangers. Not saying poly tanks would not break, but seems to me they might be a little better. Just my $0.02

Take care and good luck.