“How To”: Gen 3 LS Motor Oil Cooler/Backing Plate Gasket Replacement
Автокөліктер мен көлік құралдары
Let's just be honest for a moment... Gen 3 LS motors are going to leak oil. It's just a fact. Now that we can admit that, we can also fix the problem.
Most oil leaks on the Gen 3 LS's come from one fo four places:
1. The valve covers, specifically the driver side.
2. The oil pressure sensor due to the o-ring going bad.
3. The Rear Main Seal (have fun removing the transmission, or shelling out the money to pay for the shop labor).
4. The Oil Cooler/Backing Plate gasket.
This video covers the last of these. It's actually a thankfully simple job that truly only requires 1 tool, a 10mm wrench, but raising the front end with either ramps or a jack and strands makes it much easier due to more space to work. A torque wrench rated in lb-in is recommended, but not exactly required provided you are careful with reinstalling the 2 bolts.
There is one major difference you need to look at though between the oil cooler - equipped models and those with a backing plate. Those with an oil cooler use a gasket that has two circles in the middle divided by gasket material while those with a backing plate have a single opening in the middle of the gasket. Be sure to get the correct one for your application.
When reinstalling, do not use any type of sealant on the gasket, and be sure to torque the bolts to 87 lb-in (7.25 lb-ft).
Either gasket can be purchased at your local auto parts store, or on Rockauto.com.
Пікірлер: 74
Great video. Easy to view and you explained everything in detail. Hoping this solves my issue on 2012 Suburban.
Really good video man. This is exactly what I was looking for. I'm now a subscriber!!
I thought my motor had a major problem on my 07 sierra WT with the 4.8, turns out it's been this all along. A total pain to get to, and mine was caked with dirt stuck to the oil, but did it over the weekend when I changed the oil and it fixed it, thanks!
showing each step carefully was great!
Great job amigo!!! That's what I was looking for, same gasket.
Well ,you mean I may not have to replace the oil pan gasket after all ? Such good news . There was a question of something else leaking other than the oil pan gasket,which I did not relish fooling with. If this little gasket is the problem ,may as well change oil as well. Thanks for the video ., made my day
Was really waiting to hear how much oil was lost after this job. Didn't look like much, so I guess I'll just assume that I don't need to do this during an oil change, and just fix mine rn. Been holding off cause I thought the oil loss would be greater. Thx for video though. 👍
Nice, very informative Thanks.
Suggestion: change this after dropping your oil and oil filter on your next oil change...
Great Video!
I’ve got that leak , good video-thanks
Seeing how clean it is by the rear main seal I’m going to assume it’s the rear main seal on mine and it isn’t then all worries are gone lol Thanks for the video it’s helpful
Do you know if this leak was causing fumes to enter the cab when the engine/exhaust got hot. I have been chasing a ton of leaks over the last 6 months from valve coveres, transmission lines, exhaust manifolds, and coolant. I know this is near the driver side cat and curious if this is where my current fume issue is coming from. It has got better with each repair. But I am still not at a decent level of comfort with the current fume issue. Generally do not notice it until you stop. And usually ends up worse for a moment at a hot start.
Thanks alot buddy !
Basically tighten until it's snug and turn a little bit more?
Is the gasket the same for the gen 4?
Thanks have the same leak
Is it the Oil filter high flow and low flow put the short oil filter that goes on it and u won't have a blown oil gasket
I have changed the one on my 2011 Silverado 1500 four times already and keeps leaking. I have the actual cooking lines though. Someone told me I have to apply rtv silicone sealant around the gasket. So once I do my next oil change I’m going to do it.
@mrese13
6 ай бұрын
Did it stop the leak?
the gasket I got isnt shaped like yours it has one side that has a 90* edge, does that correspond to the edge on the oil pan at 8:40? Thanks and great video
@takeroadslesstraveled6505
Жыл бұрын
Without seeing your gasket I can’t tell you 100%
Have the same oil leak from that same gasket on my 01 Chevy suburban with the 5.3. It’s a common issue on them, getting a new block off gasket for mine. Got 136k on mine
@AcerArtsOfficial
Жыл бұрын
Just replaced mine at 250,000, use oem
@anthonycarlini7669
Жыл бұрын
I put a felpro gasket in mine, solved the problem. Hasn’t leaked in a month when I did the job. @@AcerArtsOfficial
What I heard is blue loctite and snug but not tight I have a torque wrench but it’s not rated to go that low
This should be the same for my 01 Yukon xL? 5.3 1500
@takeroadslesstraveled6505
8 ай бұрын
Yes it should
No RTV?
Did this today with that same gasket
can oil cooler mix antifreeze with engine oil ?
@craigd1275
12 күн бұрын
If the oil cooler in the radiator has a leak, then yes. The block off plate he has will NOT cause antifreeze to mix with engine oil.
Need update! Did that solve the problem or do you still have leaks?
@takeroadslesstraveled6505
9 ай бұрын
Unfortunately it is still leaking, but it is most definitely the rear main seal.
@willdavis2964
5 ай бұрын
You can inspect the rear main seal by removing the round inspection cover from the bellhousing
no rtv sylicone necessary?
@takeroadslesstraveled6505
Жыл бұрын
Nope
Is not necessary to put seal on it?
@takeroadslesstraveled6505
Жыл бұрын
Nope
Do you have to use any gasket sealer?
@craigd1275
12 күн бұрын
No. Never. The gaskets on the newer GM motors should never need gasket sealer. If you do then something is wrong (possibly warped or cracked)
Did that solve the problem?
@takeroadslesstraveled6505
2 жыл бұрын
I still have a very small leak at the rear main, but it certainly took care of what was leaving small drips on my driveway.
@mikemilam525
2 жыл бұрын
@@takeroadslesstraveled6505 Thank you. I cleaned the area off with brake cleaner and I will drive it a few miles and have a look.
How did yours fail and cause the leak
@takeroadslesstraveled6505
Жыл бұрын
Gaskets eventually dry out, crack, and/or shrink/thin out. My truck is 17 years old and this was the factory gaskets. It’s just one of those parts that will eventually need replacing.
@craigd1275
12 күн бұрын
They all start to leak. I think the original gasket was a bad design.
I use that gasket and after some time start leaking again, so I remove it and install the one is for the oil cooler, no more leaks
@octaviogarcia8196
Жыл бұрын
Where did you buy the oil cooler gasket, and do you have the part number, por favor.
@benjaminibanez4057
Жыл бұрын
@@octaviogarcia8196 let me find the number
@octaviogarcia8196
Жыл бұрын
@@benjaminibanez4057 ok thanks
@octaviogarcia8196
Жыл бұрын
I already got the oil cooler gasket from AutoZone, thanks.
@sharpie132
Жыл бұрын
@@octaviogarcia8196 did it fix the leak with the oil cooler gasket?
Part number Please
@takeroadslesstraveled6505
Жыл бұрын
FELPRO 72435
It doesn’t make any sense to put a open gasket on something that has two holes. It seems like the fluid would just fight itself going back-and-forth.
@craigd1275
12 күн бұрын
One side comes from the pump and has high pressure. The other side feeds the engine parts. Oil can only go one way. From high pressure to low pressure.
I have done mine three times and it still leaks I even replaced the cap
Seems like it would make more sense to do it in the middle of an oil change…
@takeroadslesstraveled6505
Жыл бұрын
You’re absolutely correct. Learn from my mistake.
PRO TIP: Do this repair DURING an oil change so that you don't do like this guy did and waste perfectly good oil. ESPECIALLY if the leak isn't a very significant one. If you already go between oil changes without adding a half quart or more of oil then you can wait until you do an oil change. You're welcome...
@takeroadslesstraveled6505
Жыл бұрын
Yup, you’re absolutely right. Learn from my mistake.
@bendino9016
Жыл бұрын
haha it leaked like 2 oz my guy. chill.
@James225
Жыл бұрын
@@bendino9016 You're free to think whatever you want based on your viewing of a 15 minute video. 😃 ~ Auto Mechanic for Chevrolet Dealership, 38 years
@bendino9016
Жыл бұрын
@@James225 haha ok boss.
@tomriddle4054
Жыл бұрын
@@James225 auto mechanic for 38 years and you don't realize that the oil is in the oil pan below this cover? the oil that leaks out is only what was in internal lines that would run to the cooler and back. if the engine has not been started in several hours it may leak less but that depends on other factors such as port angles, if the vehicle is on a slope toward drivers side viscosity of oil..... simple gravity.