Dismiss Notice

Welcome To CK5!

Registering is free and easy! Hope to see you on the forums soon.

Score a FREE t-shirt and membership sticker when you sign up for a Premium Membership and choose the recurring plan.

Gas Tank Question. PLEASE HELP!!!

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by Philly87, May 10, 2002.

  1. Philly87

    Philly87 1/2 ton status

    Joined:
    Jul 14, 2000
    Posts:
    465
    Likes Received:
    6
    Location:
    El Paso, TX
    Here goes guys, this may get a little long but please bare with
    me. As you can see from my profile I drive an 87 K5. I've
    had a problem with the baffle in my gas tank coming off and
    breaking the sending unit for my gas gauge. It also tends to
    take my fuel pumps out at the most inconvenient times. The
    first couple times it was the little press washers GM uses to
    hold the baffle down that kept coming off. Two sending units
    and two fuel pumps later I got the press washer solved.
    Now on the third sending unit (at $170 a pop) the "PLASTIC"
    baffle has broken. My washer solution is still on the studs
    but now the baffle is cracked all around where the original
    washers hold it to the tank. Any of you that have ever pulled
    your tank knows that the hole in the top of the tank for the
    sending unit is big enough to get a small hand through. The
    baffle is probably a 10-inch by 10-inch square. What do I
    do? The only way to get a new baffle in is to cut the tank
    open. Has anyone ever run into this before? Is there an
    aftermarket tank out there with a welded in metal baffle? I
    can't afford this dealer only sending unit with no warranty
    every time the baffle falls off. What can I do guys? Has
    anyone else ever had this problem? Please help cause the
    K5 is down!!!!

    Thanks,
    Philip
     
  2. ds350

    ds350 1/2 ton status

    Joined:
    Jan 26, 2001
    Posts:
    190
    Likes Received:
    0
    Location:
    Bay Area
    Philip,
    I have been in the same boat as you with my 87 blazer. I attempted to fix the baffle, and it did not work. In frustration, ordered a new fuel tank from JC Whitney. It was about $120, and I have not been stranded since! I always had the tank fuel when the baffle broke the sending unit....luckily I had access to a forklift to remove the tank.
     
  3. Philly87

    Philly87 1/2 ton status

    Joined:
    Jul 14, 2000
    Posts:
    465
    Likes Received:
    6
    Location:
    El Paso, TX
    Hey Danny,

    Thanks for the advice, did the JC whitney tank have a metal baffle welded in or was it another plastic baffle? Was the tank as thick and as good quality as the OEM?

    Thanks,
    Philip
     
  4. TwoCrowsDesign

    TwoCrowsDesign 1/2 ton status

    Joined:
    Jul 13, 2001
    Posts:
    387
    Likes Received:
    0
    You guys might want to check out Coleman's Surplus. They had surplus Blazer tanks for ~$25 for awhile.
     
  5. dyeager535

    dyeager535 1 ton status Premium Member

    Joined:
    Dec 13, 2000
    Posts:
    26,980
    Likes Received:
    189
    Location:
    Roy WA
    Talk to http://www.natauto.com/ I think they are around $130

    The TBI truck tanks they sell (made by American Designs) have metal baffles in them, according to AD, who I talked with.

    Do NOT mess around with the factory tank/baffles, they are cheap POS's that are not worth it. I have an '89 tank, and the baffle is broken in it as well, and I will be buying one from Nat. Auto soon.
     
  6. Philly87

    Philly87 1/2 ton status

    Joined:
    Jul 14, 2000
    Posts:
    465
    Likes Received:
    6
    Location:
    El Paso, TX
    Dorian,

    Just checked with Dave at National Automotive Lines. They carry replacement GM tanks with welded in steel baffles. The 31 gallon tank is $112 plus shipping and the 25 gallon tank is $119 plus shipping. Thanks Dorian, hopefully this will permanently solve my problems. I think I'll order it Monday. I'll let you guys know what the quality is like if I get it.

    Thanks Again,
    Philip
     
  7. dyeager535

    dyeager535 1 ton status Premium Member

    Joined:
    Dec 13, 2000
    Posts:
    26,980
    Likes Received:
    189
    Location:
    Roy WA
    Philip, no problem. Let me know how well it is constructed when you get it.

    One thing, you made sure you got the TBI tank right? I've never had a non-TBI truck tank apart, but I presume they have a baffle in them stock, but the TBI baffle should be more effective, which is why they list different tanks based on year/ FI or not.Just want to make sure you don't get the wrong tank!
     
  8. Philly87

    Philly87 1/2 ton status

    Joined:
    Jul 14, 2000
    Posts:
    465
    Likes Received:
    6
    Location:
    El Paso, TX
    The tank he listed worked for 87 - 91 fuel injected Blazers and Jimmies. I know we were working on the fuel injected model because we were looking at prices for the sending unit as well an he told me the sending unit did not come with the pump. Is there an easy way to tell if I have a 31 gallon or a 25 gallon tank?

    Thanks,
    Philip
     
  9. ds350

    ds350 1/2 ton status

    Joined:
    Jan 26, 2001
    Posts:
    190
    Likes Received:
    0
    Location:
    Bay Area
    Hi Philip,

    Most likely your truck has the 31 gallon tank....check your glove box door, it should be listed.

    Danny
     
  10. CooknwithGas

    CooknwithGas 1/2 ton status

    Joined:
    Nov 27, 2001
    Posts:
    332
    Likes Received:
    0
    Location:
    Istanbul, Turkey
    "Is there an easy way to tell if I have a 31 gallon or a 25 gallon tank?"


    Philip:

    I had the same problem determining which gas tank I had too. No-one could give me a good answer, so I ended up purchasing the 25 gallon tank and it was wrong.

    One thing that might help you is that the 25 gallon tank leaves a pretty good gap between metal tank guard and the tank. (The heavy metal thing under the tank that protects the bottom from rocks and things.) The 31 gallon tank almost touches it. I installed the 25 gallon tank and now have a few inches between the guard and the tank. I also had to order a new sending unit for the 25 gallon tank.

    I hope this helps. I'll try to measure the height of my tank to help you. My guess is that you have the 31 gallon tank.
     
  11. Philly87

    Philly87 1/2 ton status

    Joined:
    Jul 14, 2000
    Posts:
    465
    Likes Received:
    6
    Location:
    El Paso, TX
    Thanks Scott,

    My tank nearley touches the skid plate so based on what you said I'm assuming it's a 31 gallon. My parents bought the truck brand new but I doubt they remember which tank it had. I'm almost positive it's a 31 though.

    Thanks Again,
    Philip
     
  12. Philly87

    Philly87 1/2 ton status

    Joined:
    Jul 14, 2000
    Posts:
    465
    Likes Received:
    6
    Location:
    El Paso, TX
    Thanks Danny,

    Will it be a code to look for or does it just say 31?

    Philip
     
  13. dyeager535

    dyeager535 1 ton status Premium Member

    Joined:
    Dec 13, 2000
    Posts:
    26,980
    Likes Received:
    189
    Location:
    Roy WA
    Someone just posted the dimensions not more than a month ago on this board...try searching for "tank" and "dimension" or something similar in this forum and see if you can find it.
     
  14. dyeager535

    dyeager535 1 ton status Premium Member

    Joined:
    Dec 13, 2000
    Posts:
    26,980
    Likes Received:
    189
    Location:
    Roy WA
  15. Philly87

    Philly87 1/2 ton status

    Joined:
    Jul 14, 2000
    Posts:
    465
    Likes Received:
    6
    Location:
    El Paso, TX
    Thanks for the link. I'll measure the tank tomorrow and be ordering parts as soon as funds allow. Thanks for all the help guys.

    Philip
     
  16. 55Willy

    55Willy 3/4 ton status

    Joined:
    Jun 2, 2001
    Posts:
    9,946
    Likes Received:
    0
    Location:
    Keizer, Or
    No problem, thats what we are here for/forums/images/icons/cool.gif
     

Share This Page