[blacktone1234]

My oil filter starts leaking after about 1k or so on my last 2 oil changes anyone have this happen ?

 

[jeffbazell1]

No. Who's changing your oil? Sounds like someone is not tightening enough.

 

[rsingl]

Definitely not normal. Did you check to see whether it is loose?

Which engine? My 2014 3.6 has the drop in cannister style like my 2008 CTS; AC Delco starting packing a replacement O ring with these a few years ago. The original O ring will last for the life of the car if it was properly lubricated when changing filters but since a lot of people didn't the retail filters include a replacement O ring. If you have the cannister style it is possible the person changing your oil has neither lubricated nor replaced the O ring causing it to degrade.

If you have a traditional spin on filter, rarely there will be a machining problem with the mount where the threads have burrs and the filter appears to be fully tight when it isn't. Have the dealer do the next oil change if you have been using a third party place and let them know about the leak issue so that they will eyeball the filter mount during the change. Sometimes an oil change person will carelessly leave the gasket from the old filter in place when they install the new one but that generally results in an immediate and massive leak as the pressurized oil hits the filter.

And I haven't followed the various filters for the different ATS engine models but be aware that there have been a lot of issues with incorrect filters being installed on newer GM engines. A lot of filters have the filter bypass valve built in the filter that is designed to allow some dirty oil flow to bypass the filter media to avoid starving the engine for oil. Obviously filtered oil is better but dirty is better than none and when the oil is very cold there will be some oil bypassing the filter. Many current GM engines have the bypass valve set to a higher pressure differential to decrease the operating window where oil is bypassing the filter. Several dealers have been installing older filters that look the same (size, threads, similar part number series but not the same, etc.) which were for older versions of engines so be careful whether you do it yourself, use a dealer, or outside shop that the filter on the paperwork matches what GM requires for your engine.

Note that the bypass valve doesn't care about the actual operating oil pressure but is calibrated in terms of the pressure drop across the filter element and as that increases beyond the knee the bypass valve will open. This is one reason you want to avoid high RPM operation until the engine oil warms up because higher RPM increase oil pump output and resultant pressure drop across the filter element when the oil is cold. Even 5W is thick in relative terms to the filter media when it is cold. Of course neglecting the oil filter will cause it to go into bypass mode frequently. Note that oil warms up more slowly than engine coolant even when an oil to coolant heat exchanger is used. My Corvette has an oil temperature readout in addition to coolant temperature; in moderate weather coolant is up to full normal operation in about 3 miles but it takes at least 10 miles of moderate to high speed driving to bring the oil up to 175 which is the minimum desired operating temperature for high throttle/high RPM operation. So be nice to your ATS in cold weather and don't do a full throttle interstate merge two miles from your house after a cold start.

 

[blacktone1234]

No. Who's changing your oil? Sounds like someone is not tightening enough.

Cadillac dealership is changing the oil

 

[blacktone1234]

Definitely not normal. Did you check to see whether it is loose?

Which engine? My 2014 3.6 has the drop in cannister style like my 2008 CTS; AC Delco starting packing a replacement O ring with these a few years ago. The original O ring will last for the life of the car if it was properly lubricated when changing filters but since a lot of people didn't the retail filters include a replacement O ring. If you have the cannister style it is possible the person changing your oil has neither lubricated nor replaced the O ring causing it to degrade.

If you have a traditional spin on filter, rarely there will be a machining problem with the mount where the threads have burrs and the filter appears to be fully tight when it isn't. Have the dealer do the next oil change if you have been using a third party place and let them know about the leak issue so that they will eyeball the filter mount during the change. Sometimes an oil change person will carelessly leave the gasket from the old filter in place when they install the new one but that generally results in an immediate and massive leak as the pressurized oil hits the filter.

And I haven't followed the various filters for the different ATS engine models but be aware that there have been a lot of issues with incorrect filters being installed on newer GM engines. A lot of filters have the filter bypass valve built in the filter that is designed to allow some dirty oil flow to bypass the filter media to avoid starving the engine for oil. Obviously filtered oil is better but dirty is better than none and when the oil is very cold there will be some oil bypassing the filter. Many current GM engines have the bypass valve set to a higher pressure differential to decrease the operating window where oil is bypassing the filter. Several dealers have been installing older filters that look the same (size, threads, similar part number series but not the same, etc.) which were for older versions of engines so be careful whether you do it yourself, use a dealer, or outside shop that the filter on the paperwork matches what GM requires for your engine.

Note that the bypass valve doesn't care about the actual operating oil pressure but is calibrated in terms of the pressure drop across the filter element and as that increases beyond the knee the bypass valve will open. This is one reason you want to avoid high RPM operation until the engine oil warms up because higher RPM increase oil pump output and resultant pressure drop across the filter element when the oil is cold. Even 5W is thick in relative terms to the filter media when it is cold. Of course neglecting the oil filter will cause it to go into bypass mode frequently. Note that oil warms up more slowly than engine coolant even when an oil to coolant heat exchanger is used. My Corvette has an oil temperature readout in addition to coolant temperature; in moderate weather coolant is up to full normal operation in about 3 miles but it takes at least 10 miles of moderate to high speed driving to bring the oil up to 175 which is the minimum desired operating temperature for high throttle/high RPM operation. So be nice to your ATS in cold weather and don't do a full throttle interstate merge two miles from your house after a cold start.

I have the 2.0T I was able to tighten up the filter with my hand when I went under the car the dealership is where I go to do my oil changes I will make sure they check the filter to give me the correct one this has happened twice already.thank u for the in depth response much appreciated

 

[rsingl]

You are welcome and it might be time for a new dealership. See what they say when they check it. If one person is consistently under-tightening you would expect there would have been a lot of customer complaints so there may be an issue with the filter mount.

 

[blacktone1234]

You are welcome and it might be time for a new dealership. See what they say when they check it. If one person is consistently under-tightening you would expect there would have been a lot of customer complaints so there may be an issue with the filter mount.

I have 42k on the car and my last 2 oil changes were done at 2 different dealers

 

[rsingl]

That really points to either an odd coincidence, a neighbor or fellow employee with an odd vendetta against you, or a problem with the filter mount. I would place odds on the filter mount.

If the engine or chassis suddenly developed a level of vibration sufficient to cause a properly tightened oil filter on a good mount to loosen over time I am sure you would have found the vibration very noticeable.

Good luck and let us know what is found.

 

[Pezman]

If it didn't leak before, I'm thinking the center tube might have been damaged/stripped or something during an oil change and is now not allowing the filter to be tightened correctly. The actual base is pretty hard to damage, the most common problem is an oil filter gasket being stuck on it and the new filter screwed on top of it - but that usually results in a catastrophic-type leak, not a slow one. Pez.

 

[blacktone1234]

If it didn't leak before, I'm thinking the center tube might have been damaged/stripped or something during an oil change and is now not allowing the filter to be tightened correctly. The actual base is pretty hard to damage, the most common problem is an oil filter gasket being stuck on it and the new filter screwed on top of it - but that usually results in a catastrophic-type leak, not a slow one. Pez.

seems the filter had an issue there was nothing wrong with anything else.so 2 filters both leaking they said they do get some bad filters sometime.oh and it cost me $300.00 to get a battery installed also ?

 

[Pezman]

seems the filter had an issue there was nothing wrong with anything else.so 2 filters both leaking they said they do get some bad filters sometime.oh and it cost me $300.00 to get a battery installed also ?

2 bad filters in a row......never heard of that. Wow. $300 for a battery installed is about right. The ACDelco battery is almost $200, and installation takes more than just a few minutes on the ATS.

Wal-Mart has our AGM battery (At least they do here in Texas where I live) for about $150 if you want to do it yourself. Pez.

 

[blacktone1234]

2 bad filters in a row......never heard of that. Wow. $300 for a battery installed is about right. The ACDelco battery is almost $200, and installation takes more than just a few minutes on the ATS.

Wal-Mart has our AGM battery (At least they do here in Texas where I live) for about $150 if you want to do it yourself. Pez.

should have did it myself thanks.if this filter leaks this time around I will tell them they need to come up with a fix

 

[sadpanda]

Assuming it's 2.0l the filter attaches to a filter adapter, not directly to the block. A prior owner's dealer over tightened/cross threaded the oil filter on mine to the point that my dealership destroyed it trying to remove it. Could be something there too...

 

[Jwiththeats]

Does anyone know what can cause a Little oil on the converter and pipe bracket ? Thank you

 

[rand49er]

Does anyone know what can cause a Little oil on the converter and pipe bracket ? Thank you

Need more info. What engine? Got photos? Mileage? Any recent maintenance? Just trying to determine where it might be coming from.

 

[Jwiththeats]

2.5 ats 2014 150k miles and just had thermostat changed but coolant will drop in top tank and not refill with lower tank new to Cadillac so confusing not sure if normal

 

[Jwiththeats]

Also little rattle coming from somewere under hood seen a video could be converter and pipe brackett ?

 

[rsingl]

In normal operation, the top coolant tank should be full and the lower tank should be around half full with a cold engine. The top tank is filled through the pressure cap, the lower tank has a service port for filling. Use the proper Dexcool mix, either premix or use distilled water mixed with undiluted Dexcool but do not use some universal or other mix.

It takes some time for air to work out of the system so you may have to add coolant more than once after several heat/cool cycles. You also want to run heat on high for a few minutes when the engine is up to temperature to get air out of its heat exchanger and hoses.

The top tank with pressure cap is equivalent to the radiator tank on older setups and the lower tank is equivalent to the "overflow" tank that used to be used. In operation, the upper tank and engine cooling system is pressurized and coolant is vented to the lower tank when pressure builds and exceeds the desired system operating level. As the engine cools, coolant is drawn back in from the lower tank. So to operate properly, the top tank must be full sending coolant and not air to the lower tank and the lower tank level must stay above the level of the tube connecting the lower and upper tanks.

Rodger

 

[Jwiththeats]

Thank you yea think I just had to keep filling it for those few cycles cause I recently did radiator flush thanks for the info