Skip the auto shop - Our mechanics make house calls

Q: My buddy has a Subaru Forester that I have replaced the fuel injector o-rings on 3 times now and it continues to blow the rings

asked by on

My buddy replaced his head gasket, timing belt, radiator, plugs, and wires last weekend after it was all back together his injectors on the drivers side blew the o rings on the top of the injector he & his buddy who is a mechanic from out of town went to oreillys and bought felpro o rings said to be oem they put them on all injectors because he was worried that the other side would blow next about 2 days later they blew again so I replaced them for him this time because his buddy who is a mechanic went home out of town about a day after I replaced them the opposite side blew so I replaced those & those lasted a day now they have blown again I have checked each time I had done them that they are seating correctly in the fuelrail and are even I tighten them down a little bit on each side so that the pressure is evenly distributed as intighten then to insure they correctly seat I have noticed though that the felpro orings I have bought that say they are "oem"are tad thicker then the stock
My car has a manual transmission.

A: Are you using any type of lubricant while i...

Are you using any type of lubricant while installing the injectors into the rail? If you are installing them dry, they may be binding and not seating correctly. A silicone spray lubricant would work best in this situation. Only use OEM quality o-rings on these vehicles when replacing seals as the aftermarket doesn’t always get it right. The thicker rings may be keeping the injectors from seating properly. Consider hiring an experienced technician, like one from YourMechanic, to come out and diagnose your fuel injector o-rings.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
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

Get a quote

What others are asking

Q: Won't start after being read with a Genesis Touch reader

I know these two things happened simultaneously but they may not be connected. Check your fuses for your fuel pump. It's turning over which is good, it just sounds like you aren't getting fuel. You could have a bad...

Q: How many miles per gallon does my car get?

Hi there, thanks for writing in. Maximum fuel economy is typically in the 45-65 MPH range. Above 65 MPH, fuel economy falls off dramatically due to wind resistance. Below 45 MPH, engine gearing is not conducive to maximum efficiency but...

Q: At oil temp light flashing

Hello. Yes, your warning light will illuminate when the automatic transmission fluid is low. The transmission is one of the components that will turn on a "check engine" light. The reason you are low on transmission fluid may be the...

Related articles

How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.