The problem you have is this. I strongly suspect that high pressure fuel is getting in your engine probably from the fuel pump. But all the links you have been given are for oil leaks not fuel leaks. The pump is actuated by a plunger off an eccentric on the end of the camshaft. If its leaking gas into the engine, then fixing the oil sealing wont help and for sure RTV is not going to stop a fuel leak at 2200 psi or whatever the high pressure DI huge number it is. I suggest checking in with a master tech for rectification.

good luck with your problem solving.

 

I had an injector that was stuck open about a year ago it did the same thing fuel in the oil swapped the injectors out(borrowed a spare set from a friend) problem went awaw but I also had some weird fuel trims but other than that car ran fine.
maybe check the injectors

 

Did you get it checked out? I took mine in for the same thing today and they said that they (hpfp) go out sometimes and instead of leaking onto the engine it will leak into the engine, somewhat as a safety measure. And since its under warranty, ill get the oil changed for free.

 

I like to do my own repairs. Just wanted some insights before I started. I ordered the HPFP and will replace it when it comes in.

I pulled the exact specifications out of a Cobalt GM repair manual. It looks like 100 PSI is the minimum threshold for the LNF for all of you hating on my piston rings lol.


The minimum compression in any 1 cylinder should not be less than 70 percent of the highest cylinder. No cylinder should read less than 690 kPa (100 psi). For example, if the highest pressure in any 1 cylinder is 1 035 kPa (150 psi), the lowest allowable pressure for any other cylinder would be 725 kPa (105 psi). (1 035 x 70% = 725) (150 x 70% = 105).

Normal — Compression builds up quickly and evenly to the specified compression for each cylinder.

Piston Rings Leaking — Compression is low on the first stroke. Compression builds up with the following strokes, but does not reach normal. Compression improves considerably when you add oil.

Valves Leaking — Compression is low on the first stroke. Compression usually does not build up on the following strokes. Compression does not improve much when you add oil.

If 2 adjacent cylinders have lower than normal compression, and injecting oil into the cylinders does not increase the compression, the cause may be a head gasket leaking between the cylinders.

 

So you have a 2010? If you don't mind me asking, why didn't you just take it in to have it looked and/or replaced? Cheapest HPFP I found was $250.

 

It probably would be covered under powertrain I'd imagine, but money isn't a problem and I want to learn how to do things myself. It sounds stupid, but I really just enjoy working on cars as a hobby. I work IT and repair computers all day so it's nice to get out in the garage and do stuff.

 

I was told today that high pressure is covered under powertrain. And I hear that about doing it yourself, but I would hate to drop 3 bills on something I can get for free. Also, how do you like IT? I start school for it next month.

 

Dude... This is me, 100%. I work IT and repair computers all day and enjoy doing things on my Balt on my own (or at least with my buddy that can help me )

 

If it is the HPFP and isn't covered under your warranty, send me a pm. I have one I could sell you.

 

^ mine was covered under warranty...

 

I got sick of it after about 5 years lol. I’m usually working 50 hour weeks. Mainly small business users contract me around the US. Most of my work is remote repair, but I travel too.

 

I work IT too. get ready to be on call for the rest of your life haha

 

Me too.

 

Update: I put the fuel pump in the other day and everything looks good so far. Thanks for the help guys.

 

great news!!!