My 2005 f150 hydrolocked. #3 and #4 cylinders filled with gas. The dealer pulled the plugs, removed fuel and replaced the stuck injectors. They did not change the oil. Won't gas get into the oil? Shouldn't they have changed it?

 

They should have changed the oil and filter. You need to get that done right away.

 

No not necessarily on the oil change if it has less than 4,000 to 5,000 miles since the last oil change. Gas getting into the oil should not cause any harm to the engine or the oil itself. I hope they adjusted the pulse width of the new injectors so they will spray sequentially as their suppose to, otherwise varnish can build up in them and cause them to malfunction again. The mechanics use a scan tool to adjust the pulse width of the injectors by interfacing the adjustments through the PCM (Powertrain Control Module). Hope this answers your question.

Jim

 

I disagree with the above statement.

IMO you chould change the oil imediately. Cheap insurance IMO. Gas in your oil is bad. It will break down the oils viscosity levels and last I checked over full oil levels are not a good idea either.

 

Well, 2 cylinders, and a teaspoon full of gas (I'm probably being GENEROUS) won't kill his oil, but I'd still change it when I got a chance, and start over.

 

the 5w20 oil is thin enough already...add any amount of gas over a drop or 2 and now your looking at an even thinner oil

methinks you need an oil change right away to help protect your engine...$30 is cheap insurance just in case

 

Thanks for the replies.. I am going to change asap, figured the dealer should have done so...

 

Yeah, but a tiny amount of fuel like that will evaporate off and be burnt in the engine via the EGR system as soon as the engine gets to normal temperature. As for gum and varnish in the injectors, you guys will laugh at this, but I use a 1:1 mixture of STA-BIL and Marvel Mystery Oil, about four ounces, in every tank of fuel. I use this in our three vehicles plus my 4-cycle mowers. The MMO also is added to my 2-cycle mix. I recently had some warranty work done on one of our Saturn VUEs which involved pulling the intake plenum and checking the seal on the 'vacuum chamber' (the Emissions Control computer failed and there were several backfires). They wanted to charge me for checking/cleaning the fuel logs for rust/corrosion/varnish, but I just laughed and told them to skip it. Here's why I use this stuff - we can only get E10 gas here, and my research has shown the need for a light oil/solvent additive with it. Particularly on my 2007 F-150 which goes for a month or two between fills. You see, alcohol goes into solution with water and carries it right where you don't want it, the injectors. There may not be any water in the gas when you get it, but air has to be let into the gas tank as the fuel is used, and that air contains water vapor. It can condense into liquid water on the walls of the tank and the alcohol in the fuel will suck it up. You can't actually get rid of it except by using the fuel, but you can easily prevent it from causing trouble by doing what I do or something similar. Okay, flame away, but my stuff runs right all the time.

 

The fluid would need to be greater than the volume of the cumbustion chamber to hydra-lock, no? I would agree that a teaspoon is not a big deal, but I would think that it would take a fair bit more than that to hydra-lock a motor.

 

Mechanics who service Top Fuel Dragsters and Top Fuel Funny Cars change their oil twice every quarter mile because they worry about the engine damage (due to blowby past the rings) that will result. They figure it's cheap insurance. In your case it might be overkill, but the point is oil is cheaper and easier to change than parts and you don't have to change 24 quarts every quarter mile.

 

I work at a dealer and the recall includes changing the oil. Take it back and make them do it. Also make sure you don't have any bent rods. The engine will skip at idle and smooth out at speed. If they are bent, it will be covered under the recall. I have replaced a few s-shaped rods due to bad injectors.

 

sorry dbbl post

 

Hey Eallanboggs can't agree with you more but those funny car wrench's must be some fast runners! sorry couldnt resist.

 

I had the oil changed Saturday. It does seem to run a little rough at idle but runs great otherwise. I will probably take it back and have them check out the somewhat rough idle before the warranty runs out next month.

 

442w30, I was gonna say that I didn't see a pit stop at the 1/8 mile marker either. LOL. But I do agree that oil change is to cheap to not due it.