AT-205 re-seal works like a charm for rear main seal leaks
- Thread starter MikekiM
- Start date
OP
For the record, I'll confirm no errant smoke out of the tail pipe.
Interesting find. Please share results.
I got the AT-205 from Amazon, so no issue or challenge with finding it.
um.... I'm good with what I have. Have at it.Hey, we all have brake fluid sitting around. Who wants to pour some in their engine first?
That there ^^^^ is interesting.
Seriously?
I wish I got to hang on the trail with you guys. I love creative fixes when the chips are down.
I wonder if using a cap ful of Blue Devil or AT 205 vs a full treatment, just a cap full or two at changes, would be a helpful plan. My TJ is dry, and has been, so I’m doing nothing different for now personally than high mileage oil I’ve been using.
I’m super curious if these are the same additives in High Mileage oil, but every article like this one from Valvoline say they are “trade secrets”.
https://www.valvoline.com/en-eur/when-to-start-using-high-mileage-oil/
I’m also a little shocked with the quote from Valvoline below, I thought the additives were to condition the RMS, basically, to help it swell and seal. Valvoline is stating it “fills in tiny microscopic holes in metal?” I looked up Valvoline because they make the Napa high mileage I’ve been using.
“The main difference between regular motor oils and high mileage ones is typically in the additives that have the task of minimizing the roughness on the engine’s metal surfaces by filling the tiny microscopic cracks thus creating smoother mechanical surfaces.”
I’m super curious if these are the same additives in High Mileage oil, but every article like this one from Valvoline say they are “trade secrets”.
https://www.valvoline.com/en-eur/when-to-start-using-high-mileage-oil/
I’m also a little shocked with the quote from Valvoline below, I thought the additives were to condition the RMS, basically, to help it swell and seal. Valvoline is stating it “fills in tiny microscopic holes in metal?” I looked up Valvoline because they make the Napa high mileage I’ve been using.
“The main difference between regular motor oils and high mileage ones is typically in the additives that have the task of minimizing the roughness on the engine’s metal surfaces by filling the tiny microscopic cracks thus creating smoother mechanical surfaces.”
I added BlueDevil Rear Main Sealer, and have driven about 150 miles. No change, still drips a drop or two every day.
WestCoastDan
TJ Addict
OP
Yep.. I can confirm I am, um.. my TJ, is leak free.
James9100
TJ Enthusiast
Looks like AT-205 is pretty legit according to Project Farm. For those who watch the video… do you think the increased wear marks on the lubricity test are enough that it’ll actually make a difference in engine longevity or is it in all reality going to be negligible?
WestCoastDan
TJ Addict
Video be damned; It did ZERO to improve our RMS leak.
OP
Happy to report completed another oil change and continue have with no RMS leak...
Take it for what it's worth
Take it for what it's worth
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Hey, we all have brake fluid sitting around. Who wants to pour some in their engine first?
I've used it on my old Jeeps. Mechanics used it years ago to stop small leaks.
Kenneth G Zinis
TJ Enthusiast
Thanks for keeping us updated, congrats on your success MikekiM
I just watched the YouTube Farm Project channel a couple nights ago where he tested various seal restorer/leak stop additives. As I recall after he added AT-205 to a lube and ran a wear test it didn't do well at all, it caused significantly more wear than most of the others. Others had essentially the same problems too or didn't work well as a seal restorer, I wasn't impressed by any of them overall. I'll stick with High Mileage engine oils without adding anything else like AT-205.
OP
Are you adding another dose of AT-205 with every oil change? Or was it a one and done thing for you?
What oil are you using?
I just completed the 2nd high mileage conventional 10w-30 oil change in my jeep at 86,000 miles. It seems my small RMS leak has stopped leaking onto the driveway all together. It was leaking about a quarter size drop or two a day.