Oil leak

Welcome to 2CarPros.

I need you to check a couple things. First, it is very easy to double gasket an oil filter. Basically, when you remove the old filter, the rubber gasket sticks to the engine and unknowingly, you replace the filter with a new gasket. It can leak bad.

Next, the oil pressure switch/sensor can also cause a leak. I attached a picture to help locate it. Picture 2

Last, does this vehicle have an oil cooler? (picture 3)

Let me know. Make sure nothing is mixing with the oil (coolant).

Joe

1. I'm 100% positive that with the last oil change, when the old filter was removed the old gasket came off completely. I used a good hand-held spotlight and wiped the area with a shop towel, and made sure to not over tighten the new filter.

2. The oil pressure switch was replaced May 10, 2018. I actually had to go purchase a 3/8" drive, 27mm deep well socket just to remove the old one and install the new part.

3. Now the oil cooler I'm not exactly sure about. Honestly, with as many times as I have been under the hood and underneath the car within the last year alone, I really don't remember seeing that particular part.

Of course, during the time I have been working on the car I could simply have over looked it.

** Would I have noticed the oil cooler while replacing the transmission cooling lines or the Dorman heater hoses (OEM listed replacement, metal lines as opposed to "hoses")?

Welcome back:

I think I know what is happening. There is a housing that bolts to the block and the oil filter screws onto that housing. I bet that is the problem. Take a look at the picture I attached. I highlighted the part I am referring to.

Here are the names of the parts highlighted.

53 - Oil Filter Bypass Valve
54 - Oil Filter Adapter Gasket
55 - Oil Filter Adapter

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Here are the directions for removal and replacement.

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OIL FILTER ADAPTER REMOVAL
Oil Filter Adapter Removal


pic 2

1. Remove the oil filter adapter heat shield nuts.
2. Remove the oil filter adapter heat shield (2).
3. Remove the oil filter adapter bolts.
4. Remove the oil filter adapter (1) and gasket.

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Let me know if that is the problem. I'm nearly 100% confident on this.

Take care,
Joe

I think this may actually work, especially since I haven't noticed any burnt smell or any white smoke coming from under the front end.

Thank you so much for the how to instructions and diagram(s). I have now added another skill and proven to my daughter that even though my Primary field is Body & Paint work, that I can still learn something new about a vehicle - even my own - and be able to fix the problem.

Okay, two more questions.

1.) Specs show my 2007 G6 should have 4 wheel ABS. Problem is, when I replaced the front wheel bearing/hub assembly units on both front sides, they were not set up for ABS. I couldn't find anything ABS related. What could possibly be the reason?

2.) If I have to pull out my engine for a full overhaul, would it be possible to change the engine and transmission (my transmission is 4 speed automatic) for a matching 3.5L engine size and a 6 speed transmission out of a 2007 G6 GT?

I'm well aware that an attempt of this mechanical repair/level is above my experience, but I do have an experienced mechanic willing to help me with the necessary work. I'm just grateful for any experience I can gain, especially given that it would boost my credibility within my own body/paint work field.

Welcome back:

Sorry for the delayed response. I hate to ask this, but is it possible for you to copy your new questions to a new thread? We are trying to keep the questions specific to one topic so that it is helpful to others. I hope you understand.

Was I correct on the oil leak?

Let me know. Also, I promise I will watch for the repost of the new questions.

I hope all is well. Also, if you know body and paint, I can't imagine you will have trouble. Although it is a different type of work, you know how to turn a wrench. However, please don't jump into the GT engine and trans. If you do, it will require much more than just a simple engine remove and replace.

Take care.

Joe