Q: Reinstalling fuel pump back into tank

asked by on January 14, 2017

I had to replace my gas tank. Got stuck trying to reinstall the old fuel pump back into the new gas tank. There is a rubber gasket between the pump and the gas tank. No matter how hard i try I cannot press the pump deep enough into the gas tank to catch the threads evenly on the screw down ring. I tried gently tapping with mallet, I tried hitting it hard. I tried tapping with mallet using the lock ring as a bridge to apply even pressure and a block of wood, I tried it that way and hit it hard. I tried putting it in a hydrolic press with a die applying equal pressure around the pump, I cranked it like this until the the gas tank looked like it was going to fold. Even that didn't work. Should I try lubricant, what lubricant is safe to use inside a gas tank?
My car has a manual transmission.

Fuel Pump Replacement $120.92 - $1186.72 Get a Quote

If you are not using an OEM, dealer supplied gasket, but rather an aftermarket supplied gasket, that could cause this problem. The gasket you have may simply be too thick. Even if the gaskets are of the same thickness, there could easily be enough difference in the compression of the gasket, under load, as you try to install the lock ring, that it will be difficult. So, my first suggestion is procure an OEM gasket. In terms of seal lubricants, a slight film of engine oil will be harmless. If you use a silicon based material, just make sure there is not ANY excess that could get within the tank. Don’t use anything like grease. If you want these steps performed by a certified Mechanic, dispatched by YourMechanic right to your location, please request fuel pump installation and the responding mechanic will get this resolved for you. If you have further questions or concerns, do not hesitate to re-contact YourMechanic.

The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

What others are asking

Charging system failure

It sounds like you may have a problem with a weak battery or potentially a failing alternator which will cause this light to come on. As you may know, the alternator is responsible for charging the battery while the engine...

Gas problems

Some older vehicles do not have a baffle on the fuel pump, to prevent rapid changes in fuel level when turning. This may be normal for this vehicle. Fuel milage can be affected by several items like failing sensors, mechanical...

My car is completely dead

If jump starting the car works, I would suspect the alternator is no longer charging and probably needs replacement. A mechanic should fully charge your battery before testing it and if the battery passes, get the alternator tested. I wouldn't...

Catalytic converter turning bright red

You have two valve cover gaskets, one for each bank of cylinders. They should both be replaced at the same time. The left bank(front) is much easier and there are less parts to remove. The right bank(rear) is more involved...

Have a jeep liberty 3.7 and it overheats and runs rough at idle and sometimes hard to start.Also throwing misfire codes 1 and 5

Hello, thank you for writing in. There is a chance that the misfiring is being caused by the coolant leak/overheating issue. The first thing you want to do is find the source of the coolant leak, and take corrective action....

No start after transmission overheated

Hello. A no start condition can be caused by many things. If the vehicle shut off after the trans temp message came on it may be possible that the stalling was transmission related. Most transmission and engine computers are programmed...

Changing from regular oil to synthetic oil

Synthetic vs conventional oil is one of the most debated myths surrounding the topic of oil changes. This will not hurt your engine when switching from synthetic to conventional or vice versa. In fact, Synthetic blend oils are actually a...

Check Engine Light was on with a gas smell. I took it to the dealer.

I would ask what codes they found and how they determined the fuel pump was the cause. They likely diagnosed the pump by measuring fuel pressure. You didn't say what kind of Hyundai you have, but generally, fuel pressure should...

How much do you charge for the starter replacement on 2004 honda accord 2.4

In order to replace the starter on this engine the intake manifold need to be removed. It is recommended to replace intake gaskets at the same time the starter is replaced. There has been reports of the incorrect starter is...

Related articles

Are Switches Inside a Car Waterproof?
The The electrical switches inside your car control functions throughout your vehicle. You have switches that turn your headlights and radio on or off, adjust the volume of your sound system, open the power windows, and lock the power door...
How to Replace a Fuel Pump Shut Off Switch
The fuel pump shut off switch may be faulty when the Check Engine Light comes on or if the engine suddenly turns off while driving.
How to Buy a Good Quality Intake Manifold Gasket
One One of the key parts of the engine is the intake manifold, whose main role is to ensure that the right air-fuel mix arrives on time at each of the engine’s cylinders. This small part has a big boost...