.22 Crosman Optimus "dieseling?"

[Midwestairgunner]

I purchased a .22 Crosman Optimus as my first air rifle around christmas time since I found a good deal. With the weather here in Iowa I was only able to get out and shoot it today. So before I went to the range I ran some dry patches down the barrel to get out and manufacturing grease and put a drop of RMOIL into the pressure chamber per the owners manual. Once I got to the range and started shooting I noticed there would be smoke after I shot. From what I read this is called dieseling in air rifles and can be bad for them? If this is true what did I do wrong to cause the dieseling or is it not a big deal?

[heron]

My Vantage smoked a little when new (smelled real pleasant), and I didn't add any oil to the chamber until I'd gone through over a hundred shots, roughly, which is what the owner's manual instructs. So, mine had some oil in it from the factory.

I don't think you should worry about it. Go easy with the chamber oil, though, ONE drop does it. The first time I oiled mine, I must have got two drops in instead of one, and it went off loud and made a big cloud, but it's fine now. I've oiled it again since, and didn't really notice a difference that time.

[Midwestairgunner]

My Vantage smoked a little when new (smelled real pleasant), and I didn't add any oil to the chamber until I'd gone through over a hundred shots, roughly, which is what the owner's manual instructs. So, mine had some oil in it from the factory.

I don't think you should worry about it. Go easy with the chamber oil, though, ONE drop does it. The first time I oiled mine, I must have got two drops in instead of one, and it went off loud and made a big cloud, but it's fine now. I've oiled it again since, and didn't really notice a difference that time.

I tried to do one but maybe two got in there plus on top of the factory oil. I only had 50-75 shots through it today, didnt really notice if the smoke lessened or not. I'll probably wait to oil again until Im through this 500ct tin.

Thanks!

[Big Bore Bart]

   The Chinese can be a bit sloppy with the lubes at the factory.   The dieseling is most likely from the assembly lubes.   If it is not excessive, keep shooting and it will clear up.   If it's excessive, a tear down and lube tune is needed to prevent damage.

[Monkeydad1969]

Give the barrel a GOOD CLEANING.  Goo Gone will take everything out of the barrel.  Then run a bunch of patches until they are clean and dry.  You may want to just lead the barrel up by just shooting the snot out of it. I don't oil my break barrels anymore.  Just lead them up with my shooting.

Joe---Just my Lincolns*2

[Midwestairgunner]

Give the barrel a GOOD CLEANING.  Goo Gone will take everything out of the barrel.  Then run a bunch of patches until they are clean and dry.  You may want to just lead the barrel up by just shooting the snot out of it. I don't oil my break barrels anymore.  Just lead them up with my shooting.

Joe---Just my Lincolns*2

I did notice some what looked like grease in the barrel that was still there after the dry patches. Maybe I need to reclean again with goo gone. Although even with only ~75 shot I was having no problems hitting shot gun shells at 40 yards

[Midwestairgunner]

   The Chinese can be a bit sloppy with the lubes at the factory.   The dieseling is most likely from the assembly lubes.   If it is not excessive, keep shooting and it will clear up.   If it's excessive, a tear down and lube tune is needed to prevent damage.

What would be considered excessive?

[Big Bore Bart]

What would be considered excessive?

  If it's still smoking after 100-150 shots, or it's rimfire loud.

[AK73]

Yeah a new springer smoking/deseiling is totally normal. Just clean it like the other guys said.

[deweytastic]

Do not put RMCoil in your chamber or barrel EVER!  That was for back in the day when guns had leather seals and needed to become soft so they wouldn't be brittle. When you put oil in your compression chamber it will detonate and destroy your piston seal. trust me I know from experience.

[Midwestairgunner]

Do not put RMCoil in your chamber or barrel EVER!  That was for back in the day when guns had leather seals and needed to become soft so they wouldn't be brittle. When you put oil in your compression chamber it will detonate and destroy your piston seal. trust me I know from experience.

The crosman manual says the use the silicone chamber oil

[KPsWorld]

Im curious as well.  My manual says to use oil but honestly I'm not going to go buy oil.   What harm will be done?

[deweytastic]

This has been known in the airgunning community for years. The manuals have not been updated since the use of leather seals it doesn't make sense I know.  It makes you wonder if they keep it in there just so someone will buy the oil and extra parts when detonation occurs.  I to read the manual and thought ok I better try it well I could show you some pictures of my seal.  Just call yourself lucky you didn't break your spring from the detonation.  Even cleaning the barrel with rem oil like a powder burner will cause the rem oil to detonate and cause serious damage.  Dieseling is natural for a new rifle smoke should go away in around 20 shots and break in will be a few hundred shots. Detonation is not normal.

[Midwestairgunner]

This has been known in the airgunning community for years. The manuals have not been updated since the use of leather seals it doesn't make sense I know.  It makes you wonder if they keep it in there just so someone will buy the oil and extra parts when detonation occurs.  I to read the manual and thought ok I better try it well I could show you some pictures of my seal.  Just call yourself lucky you didn't break your spring from the detonation.  Even cleaning the barrel with rem oil like a powder burner will cause the rem oil to detonate and cause serious damage.  Dieseling is natural for a new rifle smoke should go away in around 20 shots and break in will be a few hundred shots. Detonation is not normal.

It's not rem oil though. it's silicone oil

[deweytastic]

They both do the same thing I just wanted to let you know to not clean your barrel as you would a powder burner with rem oil also don't use crosmans RMCoil or silicone oil either I used the crosman stuff and it will destroy your gun.

[Midwestairgunner]

They both do the same thing I just wanted to let you know to not clean your barrel as you would a powder burner with rem oil also don't use crosmans RMCoil or silicone oil either I used the crosman stuff and it will destroy your gun.

do you think I should take it all apart to get the oil out? What keeps everything in the pressure chamber working well if there is no lubrication?

[deweytastic]

don't take it apart yet it shouldn't be smoking or loud after 20 shots shoot it and see what happens.  Just don't put that oil in there anymore.  The seal doesn't need any lube on it they are self lubricating but for the piston and other stuff you will put a light coat of moly on those things.  As a rule of thumb it is always better to have an overly dry airgun than an over lubed one.

[Midwestairgunner]

don't take it apart yet it shouldn't be smoking or loud after 20 shots shoot it and see what happens.  Just don't put that oil in there anymore.  The seal doesn't need any lube on it they are self lubricating but for the piston and other stuff you will put a light coat of moly on those things.  As a rule of thumb it is always better to have an overly dry airgun than an over lubed one.

no smoke it coming out of the barrel unless I brake it open and blow down it. so I'm assume its not combustion at least. I did run more dry swaps down it today and they seem to still be taking black manufacturing grease out so Im headed to pick up some goo gone to give it a good cleaning

[grizzer]

Dewey I have been watching your advice because I also was concerned about dieseling in my new Benjamin trail NP. The manual clearly states that to maintain uniform power and keep seals in good condition it is important to add 1 drop of RMcoil every few hundred shots into the compression chamber. RMcoil is silicone based  and resists detonation. I called crosmans 800 # and tech said it is definitely important as the silicone keeps the seals fresh. They have done extensive testing on this issue and RMcoil definitely keeps seals from prematurely breaking down.

[Steeb86]

If you do a proper lube tune, no more lubing will be necessary unless you just WANT to do it. 

As to the oils, just don't use pelgunoil, only use the silicone stuff, it DOES condition the seals, but even still I wouldn't do it but every 500-1000 shots, the seals are self-lubing but they don't need a lot. 

If you want to just forego all the silicones and crud, just break it down and follow DaTuna's lube tune in the library.  I did it with my Nitro Venom and haven't needed to lube in WELL over 2000 shots and it still throws down better than new even with the stock piston seal.  I even took it apart after 1000 shots to check everything out and it was 1000000% intact and even kept the seal lubed on its own.