1998 Mazda B4000 Fuel Tank Leak

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RECAROGUY
  • MEMBER
  • 9 POSTS
1998 Mazda B4000 4x4 truck, 152,000 miles--in good shape. Question--I've noticed that when the truck is parked on a steep incline (rear of truck much higher than the front), with a full gas tank, gas leaks out and covers the front half of the bottom of the fuel tank, and it is wet up both sides of the tank as far as I can see. It is not coming from the filler cap--looks to be coming from the TOP of the tank somewhere (towards the front,near the center). I wouldn't think this is normal, but really don't know. The fuel pump was replaced about 3000 miles ago by a dealer, so am wondering if maybe something wasn't installed correctly, or is loose? Or possibly at this type of angle maybe this is normal with a completely full gas tank? Replies are appreciated. I asked this question in the ford ranger section since this truck is basically the same thing, but had no responses and figured I'd ask it here (even though I don't see B4000 listed, and this IS a truck, not a car). But--------if anyone sees this question and would like to reply----------thank you.
May 25, 2006 at 10:45 AM
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SDALTON19
  • ✓Experienced Mechanic
  • 87 POSTS
take it back to the place that installed the pump they didnt get it sealed this is not normal and possibley dangerous take it back as soon as you read this
May 25, 2006 at 4:17 PM
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RECAROGUY
  • MEMBER
  • 9 POSTS
sdalton19--Thank you very much for your reply. Kinda what I thought--I have called the shop back and am taking it in next Tuesday. I'm not going to drive the truck till then--as I agree--could be very dangerous. Thanks again, Recaroguy.
May 26, 2006 at 2:25 AM

Suggested Repair

Return the truck to the shop that installed the fuel pump so the tank seal can be corrected. Do not drive it until the leak is fixed, because a fuel leak is unsafe.

Conversation Summary

The owner of a 1998 Mazda B4000 reports fuel leaking from the top of the tank, near the front center, when parked nose-down on a steep incline with a full tank. The filler cap is not the source, and the fuel pump was replaced about 3,000 miles earlier. The expert said this is not normal and may be dangerous, and advised returning it promptly to the installer because the pump was likely not sealed correctly. The owner scheduled the repair and planned not to drive the truck until then.

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