07 Tahoe/Oil leak in the front

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Dustin Jackson

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@ukrkoz In your picture you can see the 2 bolts that hold it it to the block. Just need to extend your arms man it's very easy to get to
 
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ukrkoz

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OK, so I found this video here:


And it looks exactly like mine. Should be able to do it in like 45min, considering all the lift prep.
Hopefully, that's the case.
 

Dustin Jackson

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While you are in there look and see if there is any oil above the oil cooler plate that should give you a good idea where the oil is coming from.
 
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ukrkoz

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OK, just replaced that gasket.
Part number is FelPro 72435. It's much thinner, than OEM gasket and does not have rubber seal built in but that's what A1Auto used in their video. We'll see.
Job itself is about ten minutes. I used swivel head 10mm wrench but, any quality 10mm should do, as far as it's box wrench, not open end one. I have large hands yet, it is quite simple to slide left hand around the exhaust pipe to do bolts while the left hand holds everything in place.
Lost maybe half a cup of oil. But I got it on top of my lift and let it sit for an hour, while I went to parts store.
Just for Mr Dustin here yes, I did look above. It is hard to tell. I had leaking valve cover gasket, replaced about 1.5 mth back, so there is some oily dusting above the part in question. Nothing major. No telling, truly. I sprayed everything with cleaner, wiped it all off, will give it a week and see.
Ran engine with some revs, for few minutes, no leak from the replaced gasket.
Also replaced trannie bell housing inspection hole cover. It was LIA for long time. Nine bucks for a piece of stamped sheet metal...
So that's it.
I'll definitely do the radiator summer time. I have large gravel parking lot, that will be good place to do the job, instead of spilling coolant all over the garage floor. Looks like an hour job. Maybe in May, should be about right weather.
 
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ukrkoz

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OK, so here's the update.
No leak from the deflector. No leak above it.
It IS the rear main seal. Leak is clearly coming from the bell housing. Starting about midway up, at approximately deflector level and all the way to the bottom. I figure, flywheel picks up oil and tosses it onto the bell housing and it seeps out.
I'll wait till summer, will have it done.
Now, the radiator leaks. I', ordering ACDElco one next, don't really want AM ones because of the transmission cooler... $252.
 

donjetman

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OK, so here's the update.
No leak from the deflector. No leak above it.
It IS the rear main seal.
Here's a thread I did w/pics when I did our RMS in late 2013, when it had 130k miles. Today it has 186k miles. Dry as a bone and still running strong. No regrets.
I recommend that you change the torque converter too. I installed a Precision brand, pt# P4646, cost $215 back then.
https://www.tahoeyukonforum.com/threads/rear-main-seal-job-pan-etc-07-yukon-denali-6-2.108334/
 
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ukrkoz

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Here's a thread I did w/pics when I did our RMS in late 2013, when it had 130k miles. Today it has 186k miles. Dry as a bone and still running strong. No regrets.
I recommend that you change the torque converter too. I installed a Precision brand, pt# P4646, cost $215 back then.
https://www.tahoeyukonforum.com/threads/rear-main-seal-job-pan-etc-07-yukon-denali-6-2.108334/
TC is already changed, when they overhauled trannie. I'll hire someone to do the seal. Too old.
 

donjetman

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TC is already changed, when they overhauled trannie. I'll hire someone to do the seal. Too old.
Did my RMC in late 2018, not 2013.
If I didn't have my own lift I wouldn't DIY either. Lift is a came changer for me.
 

89Suburban

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OK, just replaced that gasket.
Part number is FelPro 72435. It's much thinner, than OEM gasket and does not have rubber seal built in but that's what A1Auto used in their video. We'll see.
Job itself is about ten minutes. I used swivel head 10mm wrench but, any quality 10mm should do, as far as it's box wrench, not open end one. I have large hands yet, it is quite simple to slide left hand around the exhaust pipe to do bolts while the left hand holds everything in place.
Lost maybe half a cup of oil. But I got it on top of my lift and let it sit for an hour, while I went to parts store.
Just for Mr Dustin here yes, I did look above. It is hard to tell. I had leaking valve cover gasket, replaced about 1.5 mth back, so there is some oily dusting above the part in question. Nothing major. No telling, truly. I sprayed everything with cleaner, wiped it all off, will give it a week and see.
Ran engine with some revs, for few minutes, no leak from the replaced gasket.
Also replaced trannie bell housing inspection hole cover. It was LIA for long time. Nine bucks for a piece of stamped sheet metal...
So that's it.
I'll definitely do the radiator summer time. I have large gravel parking lot, that will be good place to do the job, instead of spilling coolant all over the garage floor. Looks like an hour job. Maybe in May, should be about right weather.

You can use this to evacuate the coolant as you disassemble from the top down to replace the radiator. Money well spent for me for evacuating fluids of all fluids while working on the truck. I plan on replacing my radiator this spring as well.


 
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