Fuel pump will not seat in tank

KENW1

MECHANIC
1998 CHEVROLET S-10
1.1L
4 CYL
2WD
MANUAL
200,000 MILES

You're going to laugh either I'm an idiot or overlooking something simple. New Carquest brand pump won't push down all the way. Tried everything even bought a new o-ring. It just will not go down enough to engage the lock ring. Without o-ring it'll fit. Any idea on alternative sealing methods?

Thursday, January 21st, 2021 AT 3:55 PM

4 Replies

KASEKENNY

MECHANIC
18,907 POSTS

Hi KENW1,

Thanks for using 2CarPros :)

I ran into this on a Ranger and it turned out to be the a catalog issue that they assume all the pumps for a range of model years was the same. Switched brands and it fit perfect. I mean this was the exact issue that the ring would not not go on. The lip on the pump was too large and would not fit with the seal.

Do you have the old pump to compare them side by side? There has to be something different between the two. Maybe some pictures of what you are dealing with too will help pick out the issue.

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Thursday, January 21st, 2021 AT 5:49 PM

ASEMASTER6371

MECHANIC
52,796 POSTS

Hi Ken,

It is the o-ring itself? They are too thick and do not want to seat.

I use vaseline jelly and smear it all over the ring and landing. Then try pushing it down.

https://www.2carpros.com/articles/how-to-replace-an-electric-fuel-pump

The last resort is using the old ring but you may end up with an evap leak or fuel leak.

Roy

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Thursday, January 21st, 2021 AT 5:53 PM

KENW1

MECHANIC
213 POSTS

Thank you gentleman! After taking a break I attacked it again and had success. Smearing the heck out of it with Vaseline worked. First time I ever ran into this.

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Sunday, January 24th, 2021 AT 1:59 PM

ASEMASTER6371