3.0 engine flush?

[Deleted User 38384]

I did my engine flush today, along with my oil change, engine oil filter, cabin air filter, and engine air filter. I don't have AC and I'm not about to start using the heater and 90° Texas weather, but I figured keeping a standard number of miles between the cabin air filter would be a smart choice for the long run. It's a K&N cabin air filter so it was just cleaning it and sticking it back in.

I didn't take any photos because why really, and also because I couldn't find my phone all morning because my granddaughter hit it in her toy chest because God hates me!

Anyways, the Jeep sounds fine, after the engine flush. Literally poured in the whole bottle, let the vehicle idle for 10 minutes and then drained all the oil. I got to say the oil comes out a whole lot quicker when you drain it immediately after turning the vehicle off rather than waiting 45 minutes for the engine to cool down.

I might start draining the oil from the Wrangler from this point forward while it's still super hot.

I always put exactly nine quarts into the Wrangler, but I yanked out about 10 quarts of oil. Now I only added 16 oz (0.5 quarts) of engine flush. I don't have any proof, I'm not about to dump out my dirty oil canisters, but I'm fairly certain that extra half a quart of oil beyond the 16 oz of flush was displacement from engine sludge. At least that's my best guess.

Either that or there's a band of criminals out there topping off people's oil in the dead of night!

Only 40,000 mi in, my Wrangler. It actually sounds quieter idling after this last oil change then it has before I started the oil change. I think I'm going to keep doing these engine flushes every 40,000 mi until my engine dies or the flushes start causing issues.

If you look online what negative side effects of engine flushes are, they are that if you have bad gaskets, the sludge that may be protecting the leak will be taken away and the bad gasket will be exposed with a new leak. However if I'm practicing this early on instead of at the end of the engines life cycle, I might be correct to assume that a bad gasket will present itself before a last minute engine flush would.

Basically I'm going to keep doing engine flushes every 40K miles.

Happy Father's Day everybody!

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[AC77]

Thanks for writing this. May I ask which brand of motor flush you used ?

 

[Deleted User 38384]

Thanks for writing this. May I ask which brand of motor flush you used ?

I ended up shelving the AmSoil Engine Flush and will use that in the wife's Subarus oil change in the next 3,000 mi. Her vehicle has 62,000 mi on it right now and I don't take as good care of her vehicle as I do my own. Probably just because I don't drive it everyday. So maybe my guilty conscience is thinking I should use the more expensive stuff in her vehicle.

I ended up putting seafoam into mine.

If you look at the directions in the back for crankcase oil, it says 1 oz per every quart of oil. It also says you should put another 100 to 300 mi on the vehicle before you change the oil, But everything I've read online says that's a terrible idea. So I opted too just idle my Wrangler for 10 minutes after dumping probably close to 10 oz into it. I didn't really measure I just kind of guessed what was 9 oz.

 

[grimmjeeper]

I did my engine flush today, along with my oil change, engine oil filter, cabin air filter, and engine air filter. I don't have AC and I'm not about to start using the heater and 90° Texas weather, but I figured keeping a standard number of miles between the cabin air filter would be a smart choice for the long run. It's a K&N cabin air filter so it was just cleaning it and sticking it back in.

I didn't take any photos because why really, and also because I couldn't find my phone all morning because my granddaughter hit it in her toy chest because God hates me!

Anyways, the Jeep sounds fine, after the engine flush. Literally poured in the whole bottle, let the vehicle idle for 10 minutes and then drained all the oil. I got to say the oil comes out a whole lot quicker when you drain it immediately after turning the vehicle off rather than waiting 45 minutes for the engine to cool down.

I might start draining the oil from the Wrangler from this point forward while it's still super hot.

I always put exactly nine quarts into the Wrangler, but I yanked out about 10 quarts of oil. Now I only added 16 oz (0.5 quarts) of engine flush. I don't have any proof, I'm not about to dump out my dirty oil canisters, but I'm fairly certain that extra half a quart of oil beyond the 16 oz of flush was displacement from engine sludge. At least that's my best guess.

Either that or there's a band of criminals out there topping off people's oil in the dead of night!

Only 40,000 mi in, my Wrangler. It actually sounds quieter idling after this last oil change then it has before I started the oil change. I think I'm going to keep doing these engine flushes every 40,000 mi until my engine dies or the flushes start causing issues.

If you look online what negative side effects of engine flushes are, they are that if you have bad gaskets, the sludge that may be protecting the leak will be taken away and the bad gasket will be exposed with a new leak. However if I'm practicing this early on instead of at the end of the engines life cycle, I might be correct to assume that a bad gasket will present itself before a last minute engine flush would.

Basically I'm going to keep doing engine flushes every 40K miles.

Happy Father's Day everybody!

There's usually additives in the oil that help keep the seals in good shape. The key is regular changes which most people do.

I've seen a few transmissions with well over 100K on them between flushes that the seals blow out shortly after getting fresh fluid. But that's a decade or more of buldup getting dissolved when the new fluid starts flowing.

 

[AC77]

I ended up shelving the AmSoil Engine Flush and will use that in the wife's Subarus oil change in the next 3,000 mi. Her vehicle has 62,000 mi on it right now and I don't take as good care of her vehicle as I do my own. Probably just because I don't drive it everyday. So maybe my guilty conscience is thinking I should use the more expensive stuff in her vehicle.

I ended up putting seafoam into mine.

If you look at the directions in the back for crankcase oil, it says 1 oz per every quart of oil. It also says you should put another 100 to 300 mi on the vehicle before you change the oil, But everything I've read online says that's a terrible idea. So I opted too just idle my Wrangler for 10 minutes after dumping probably close to 10 oz into it. I didn't really measure I just kind of guessed what was 9 oz.

I have been changing my oil since day one @ every 4500 or so miles with the oil filter
haven’t noticed anything abnormal with the oil

 

[Deleted User 38384]

I have been changing my oil since day one @ every 4500 or so miles with the oil filter
haven’t noticed anything abnormal with the oil

Neither have I.

While I imagine the only thing I do that could possibly cause sludge is extensive idling, I figure it's an extra $10 to $20 every 20,000 to 40,000 mi, and it will clean up any built up sludge which forms in that time. It might not be cleaning up anything, it could be cleaning up a lot, it's kind of hard to tell with our diesel engines because the oil is so black every time.

Put it this way, it's $10 to $20 every couple years for peace of mind and in the end it won't hurt your engine.

The wife Subaru should be easier to tell if it did much, because her oil pretty much always comes out pretty damn clean.

 

[AC77]

Neither have I.

While I imagine the only thing I do that could possibly cause sludge is extensive idling, I figure it's an extra $10 to $20 every 20,000 to 40,000 mi, and it will clean up any built up sludge which forms in that time. It might not be cleaning up anything, it could be cleaning up a lot, it's kind of hard to tell with our diesel engines because the oil is so black every time.

Put it this way, it's $10 to $20 every couple years for peace of mind and in the end it won't hurt your engine.

The wife Subaru should be easier to tell if it did much, because her oil pretty much always comes out pretty damn clean.

I’m all for it I’m at about 19k I will do some more investigating … but no seafoam for this engine. Amsoil it is. Cheers

 

[NewbJLUOwner]

I did my engine flush today, along with my oil change, engine oil filter, cabin air filter, and engine air filter. I don't have AC and I'm not about to start using the heater and 90° Texas weather, but I figured keeping a standard number of miles between the cabin air filter would be a smart choice for the long run. It's a K&N cabin air filter so it was just cleaning it and sticking it back in.

I didn't take any photos because why really, and also because I couldn't find my phone all morning because my granddaughter hit it in her toy chest because God hates me!

Anyways, the Jeep sounds fine, after the engine flush. Literally poured in the whole bottle, let the vehicle idle for 10 minutes and then drained all the oil. I got to say the oil comes out a whole lot quicker when you drain it immediately after turning the vehicle off rather than waiting 45 minutes for the engine to cool down.

I might start draining the oil from the Wrangler from this point forward while it's still super hot.

I always put exactly nine quarts into the Wrangler, but I yanked out about 10 quarts of oil. Now I only added 16 oz (0.5 quarts) of engine flush. I don't have any proof, I'm not about to dump out my dirty oil canisters, but I'm fairly certain that extra half a quart of oil beyond the 16 oz of flush was displacement from engine sludge. At least that's my best guess.

Either that or there's a band of criminals out there topping off people's oil in the dead of night!

Only 40,000 mi in, my Wrangler. It actually sounds quieter idling after this last oil change then it has before I started the oil change. I think I'm going to keep doing these engine flushes every 40,000 mi until my engine dies or the flushes start causing issues.

If you look online what negative side effects of engine flushes are, they are that if you have bad gaskets, the sludge that may be protecting the leak will be taken away and the bad gasket will be exposed with a new leak. However if I'm practicing this early on instead of at the end of the engines life cycle, I might be correct to assume that a bad gasket will present itself before a last minute engine flush would.

Basically I'm going to keep doing engine flushes every 40K miles.

Happy Father's Day everybody!

Happy Father's Day
Please keep this update going in future. I would like to hear feedback regarding this flush
I've got my next service @ 35,000 miles planned that I'm doing very soon
Oil change, oil filter, fuel filter, both differentials, transfer case, cabin filter and cleaning the K&N air filter. Was considering flush, but chickened out lol
Also, no fuel filter replacement @ same time as Oil Change?

 

[Deleted User 38384]

Happy Father's Day
Please keep this update going in future. I would like to hear feedback regarding this flush
I've got my next service @ 35,000 miles planned that I'm doing very soon
Oil change, oil filter, fuel filter, both differentials, transfer case, cabin filter and cleaning the K&N air filter. Was considering flush, but chickened out lol
Also, no fuel filter replacement @ same time as Oil Change?

I do my oil, oil filter, engine air filter change every 5,000 mi.

My fuel filter every 10,000 mi.

My cabin air filter, differentials every 20,000 mi.

And my transfer case every 40,000 mi.

Here at 40,000 mi right now, what I have left to do is my fuel filter, differentials and transfer case.

The fuel filter should be arriving today. I normally order two or three at a go from Amazon but I guess I didn't last time so I had to order 2 yesterday. I still need to purchase differential oils and transfer case fluid. So I'll probably do the transfer case and the rear differential sometime this month or early July, and my front differential I'll probably put off until August when I can get a new M210 differential cover for it so that I can easily drain the differential through the cover without having a yank the whole thing off at my 60,000 mi change.

I was looking at this guy for the front differential cover.

$187 is a really good deal for the whole cover and already powder coated too!!

 

[Deleted User 38384]

I'll say this much about it, and I don't know to what extent it is because of the flush or if it's just from the new oil, but for the last 2500 miles, my diesel has sounded extra loud and a little bit clunky almost. It sounded normal but it didn't purr as quietly as it did when I first got it. After the oil change and subsequent engine flush yesterday, it sounds super quiet again.

I could just be my imagination, but I know a few times over the last couple months I got out of my vehicle and put my ear to the wheel well because I would hear this loud sound which is hard to describe. It kind of sounds like a clicking sound from in the cab of the vehicle, but from the wheel well it just sounded normal. As of today putting another 60 miles on it, that sound is gone. The engine sounds quieter honestly more like how it did when I first bought it where I would only hear the engine if I was up against a brick wall and could hear it echoing back.

 

[Neutrino]

A neat trick if you want to do super hot oil changes is to use a shop vac over the oil filling hole (with the cap off), then undo the drain plug and oil will stay in the pan until you remove the shop vac hose from the oil filling hole and no hot oil on your hands or arms. Keep in mind... It only works if the shop vac is on... Ask me how I know

 

[Deleted User 38384]

A neat trick if you want to do super hot oil changes is to use a shop vac over the oil filling hole (with the cap off), then undo the drain plug and oil will stay in the pan until you remove the shop vac hose from the oil filling hole and no hot oil on your hands or arms. Keep in mind... It only works if the shop vac is on... Ask me how I know

That's pretty cool.

I use one of those tube connection points so it doesn't drip on me at all. But good knowledge all the same!

 

[Neutrino]

Do you have a picture of this tube connection point... Is it a valve that replaces the drain plug? I had seen those on the web and thought... Well that would suck if I hit on something while doing some fun stuff lol.

 

[Deleted User 38384]

Do you have a picture of this tube connection point... Is it a valve that replaces the drain plug? I had seen those on the web and thought... Well that would suck if I hit on something while doing some fun stuff lol.

https://a.co/d/0bCgg3ud

A couple ppl on here have the same concern, but if you're like me and have no engine skid plate, you avoid dragging that area of your undercarriage on any rocks already.

Until you get an engine skid, I wouldn't rick any rocks in that area myself.

That being said, mine has held up well and I haven't torn it off.

It's not as exposed as one may think. The oil pan is already tucked pretty far out of the way. You'd really need to be aiming for it to hit a rock on it. Going straight over an edge would hit your rock rails, not your oil pan nor this drain plug.

I'll grab you some photos of what I mean here in a little bit.

 

[Deleted User 38384]

@Neutrino

Like I said, the oil pan is pretty well tucked away. You really have to be aiming for it to hit it. And as you can see this new drain plug spout doesn't sit low enough that it would really rub on anything, again unless you're purposely dragging the center of the vehicle over a rock, with the high point in the center; which who in their right mind would do that without a skid plate!?

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