Help! how to get rid of dieseling

[hzyl0402]

Hey Guys,

I just disassembled my RWS 48, and cleaned every part inside, but when I put them back and test fire it, it dieseled. I know it would damage my gun, How can I get rid of it?

Liang

[Mark 611]

well what did you do when you put it back together as far as lube?

[hzyl0402]

In the piston chamber, I used 6 drops of Crosman silicone chamber oil. For other parts I used Ballistol multi-purpose oil. The multi-purpose oil mast be in the barrel or chamber now, I don't know where is it exactly.

Liang

[SAADE]

Liang, here's the deal... 6 drops of chamber oil is too much, Ballistol "multi" is super transient (likes to move around) and you are correct in your assumption, it's in the compression tube and everywhere else.

Take the stock off and  clean her up again with de-natured alcohol. Use compressed air and even a blow-dyer on low heat to dry out the gun completely, very completely. Let it sit in a warm space for 24 hours with the breech open if possible (no this won't damage your spring for this short period).

Lightly lube the main spring with your choice of a low/no solvent carrier moly grease. Use a very light gun oil like Rem Oil to put just a drop on hinges, pins, trigger parts and other mechanical stuff (not near or in the compression chamber or main seal). Re-assemble, use one drop of PURE silcone chamber oil in the chamber (no solvents) and you are good to go.

[Mark 611]

well theirs your problem! you cannot put any oil on the internals of an airgun! do not ever use chamber lube in the compression tube I don't care who tell you what! or anywhere inside. it will burn off eventually but it will probably cook your piston seal! I don't mean to sound harsh but these are no no's If you need help their is information on how to properly lube an airgun and if you need help just ask! no one will bit your head off! the dumbest question their is is the one you don't ask! theirs plenty of people here to help you!

[hzyl0402]

Thanks guys.
Here is the latest news. Before I saw your suggestions, I cleaned the barrel and fired several rounds. The dieseling is gone. But I don't know if it's safe now.
Here are the details about how I cleaned her. When I was cleaning the internal parts, I sprayed Ballistol oil on kitchen towel and wiped every part except  inside surface of compression chamber and piston. For that I used only dry kitchen towel. The spring is from JM, so I put heavy tar that came with the kit. Before put them back I sprayed compression Tube with ballistol oil to reduce the fiction between compression Tube and compression chamber, and one drop for each joint and trigger. I did that because the first time I receives that gun it had a lot of oil in the compression Tube.

Liang

[s10gto]

IMO the best thing to do is to clean it all out and relube with JM lubes. JM lubes IMHO are the best. The moly for the outside of the seal , clear tar for outside of compression tube and heavy tar for the spring. After the Lube it will be a super smooth shooter for a very long time.

Good luck!

http://www.airrifleheadquarters.com/catalog/item/251484/4169286.htm

While you are in there I recommend the Apex seal too.

http://www.airrifleheadquarters.com/catalog/item/251485/43075.htm

Dustin

[condor22]

Shoot heavy pellets, will prevent dieseling!



 

[longislandhunter]

Take Dustins advice.. clean your rifle again and relube with JM lubes.  You'll be happy you did

And as for that chamber oil.. as the others have told you.. don't use it.

Jeff

[WHITEFANG]

Just tore one down and back and together with moly and did a cleaning of hot water and dawn. Just like a mussel loader and NO dieseling. With all my tear downs I have never had that problem. NO SOLVENTS IN OR AROUND COMPRESSION CHAMBER. Solvents and or oil base products under compression with air will equal blast, explosion. Oil and OXYGEN do not mix under high pressures.

[Nathan]

Liang,
Don't feel like people here are beating you up cause you didn't know and or used too much of or the wrong lube or both. Unfortunately, most airgun owners manuals recommend lubing too frequently which can be harmful too. You would think that if you followed the mfg's instructions you'd be OK, right? Not always the case. A lot of people here (myself included) learned the hard way, made their share of mistakes and want to help other avoid them.

Nathan

[s10gto]

Well said Nathan. We have all been there. I first tuned my 34 a few different ways as far as lubes. I then found JM lubes and the proper way to use them. I have now tuned many rifles from low to high end and its been smooth sailing even since. 

Dustin

[s10gto]

Liang if you end up putting a new seal in it is best to have your compression tube Sunnen honed. A Sunnen hone will made your tube perfectly round within .0001. It will also make the perfect finish for the new seal.

I have a Sunnen and would be glad to help you. 

Dustin   

[WHITEFANG]

Liang,
Don't feel like people here are beating you up cause you didn't know and or used too much of or the wrong lube or both. Unfortunately, most airgun owners manuals recommend lubing too frequently which can be harmful too. You would think that if you followed the mfg's instructions you'd be OK, right? Not always the case. A lot of people here (myself included) learned the hard way, made their share of mistakes and want to help other avoid them.




By all means not beating anyone down. Can't say that I haven't dropped any oil down the recever chamber. Manuel said to, looked a  mussel loader. and I will take it back I did over load a tune that did the same. No dieseling just the smoke.

[hzyl0402]

Liang,
Don't feel like people here are beating you up cause you didn't know and or used too much of or the wrong lube or both. Unfortunately, most airgun owners manuals recommend lubing too frequently which can be harmful too. You would think that if you followed the mfg's instructions you'd be OK, right? Not always the case. A lot of people here (myself included) learned the hard way, made their share of mistakes and want to help other avoid them.

Nathan

Thanks Nathan,
Now I found the real experts are all here, obviously I am a newbie and mad on air gun only more than 1 year, tons of things need to figure out. From now on, I will ask before doing anything.

Liang

[hzyl0402]

Just tore one down and back and together with moly and did a cleaning of hot water and dawn. Just like a mussel loader and NO dieseling. With all my tear downs I have never had that problem. NO SOLVENTS IN OR AROUND COMPRESSION CHAMBER. Solvents and or oil base products under compression with air will equal blast, explosion. Oil and OXYGEN do not mix under high pressures.

I admit I did completely wrong and dangerous things. Just ordered JM's lube, hope this will be a slam done.

Liang

[hzyl0402]

Liang if you end up putting a new seal in it is best to have your compression tube Sunnen honed. A Sunnen hone will made your tube perfectly round within .0001. It will also make the perfect finish for the new seal.

I have a Sunnen and would be glad to help you. 

Dustin   

Dustin,

I did ordered a JM's seal, and It's on the way my home. When I get it, I will let you guys know. A lot of questions will coming up, haha.

Liang

[Mark 611]

ask away my friend!

[WHITEFANG]

We all learn form our mistakes. Sometimes takes doing it twice, knowing better and doing it again. Thats what makes this a hobby. There is alot of stored energy in these guns,not to mention the compression factor. Just think of the size of these pistons and compair it to the size of the hole it forces the air to push the pellet out of the barrel at 700fps to 1000fps and some much faster.HANG IN THERE!!!