New HW30s at UPS and being delivered today. (From Krale). I have read a lot here at Airgun Nation and I see "Dieseling" mentioned. Some say it's no problem and others say to clean the barrel before I shoot it the first time. If it occurs is it a puff of white smoke coming out of the muzzle as you shoot the rifle? Thanks .
Other Dieseling ?
- Thread starter Tarheel
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I got a hatsan 95qe. All the cleaning and krytox and still ...
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Portrayed actual shooting of it ..
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Smoke em' if you've got 'em.
Those H@t$ans are either bone dry or swimming in gravy. I just hang them in the corner for a week and let all the juice drip out before I take them out of the stock. I have a spot on the floor that looks like I parked the backhoe for a month.
The smoke from the Turkish massage cream they use is an aphrodisiac. Get yourself a big hit of it before you go to the cowboy dance. Dab a little behind your ears. Watch the ladies go wild.
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I thought dieseling was the result of burning lubricants in the compression tube, not the barrel. How do cleaning solvents burn in the barrel? Maybe I misunderstood what you were saying.
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Oil under pressure burns. Dieseling can occur anywhere there is enough pressure. When that piston slams it pressures up everything behind the pellet.
There can be more oil and more pressure in the comp tube for sure. So diseling and DETONATION occurs there first. But it also occurs in an oily barrel.
"Dieseling" is vapor lingering after the shot. "Detonation" is when it pops because the burning oils cause more pressure.
Different oils vaporize at different pressures. The stuff they use in a comp tube is pretty stable. The stuff you clean a barrel with is not. It diesels (burns) easily. After a few shots the stuff in the comp tube is (ideally) burned off. Every time you clean your barrel you coat it with oils that are going to vaporize and "diesel" a bit.
The goo they put in the barrel after manufacturing is nasty waxy stuff. It gets down into the nap of the metal and can't be all cleaned out. It takes a good cleaning, a hundred shots and another good cleaning and polishing to get it all out. It "diesels" too.
So "detonation" is extreme "dieseling" and dieseling is smoke or vapor lingering after the shot. Both can occur in the comp tube or the barrel. Excessive dieseling is an indication of a fire (detonation) somewhere. In the comp tube it will destroy a seal. In the barrel it's less critical.
To keep dieseling down in the barrel get all the oil out of it after cleaning. A couple dry patches will do it. A patch damp with acetone really strips the oil out but is probably unnecessary. As long as the bore isn't swimming in oil a couple shots will take care of it.
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I had the fumes seep in to the compression tube/ or sucked in cocking it ? from cleaning the barrel. Lol. Nice crack when shot ..
. Just more crazy airgun stuff ..lol Upvote 0
I think oil passes by the seals from the rear when you cock the gun. Especially if there's a lot of thin oil in the tube behind the piston. If it's wet back there they never completely quit smoking.
Some seals may scrape it back better than others. Some may fit tighter. Some oils may migrate faster. I think they all smoke a little to some extent. I don't have a pellet rifle that dosent do it a little.
My H@t$ans all had lots of thin oil and seem to do it the worst. The HW's have thicker lubricant and do it a lot less. There is bound to be a correlation there.
Some seals may scrape it back better than others. Some may fit tighter. Some oils may migrate faster. I think they all smoke a little to some extent. I don't have a pellet rifle that dosent do it a little.
My H@t$ans all had lots of thin oil and seem to do it the worst. The HW's have thicker lubricant and do it a lot less. There is bound to be a correlation there.
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So I have a Gamo Hunter in .22. I cleaned the barrel after a few test shots because it was dieseling.
After cleaning it. It shot well for another 40-50 shots. Back to Dieseling
Guess I’ll clean it again. But where is the fresh oil coming from
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So I have a Gamo Hunter in .22. I cleaned the barrel after a few test shots because it was dieseling.
After cleaning it. It shot well for another 40-50 shots. Back to Dieseling
Guess I’ll clean it again. But where is the fresh oil coming from
Behind the seal? From an obturated or scored comp tube? Cracked or split seal?
Like I say, all mine do it a little. My only theory is thin lube getting in front of the seal. Or maybe just vapor from rapid compression/decompression? I honestly don't know.
Whenever I see a little smoke and start pondering where it came from I drink beer. It seems to help. Nothing else I've tried has.
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When I studied Tribology a little more, I concluded that for AG (all parts) the best option is a high-quality, long-life assembly paste NLGI 1-2 with Tungsten disulfide, MoS2, Hexagonal boron nitride, Graphite. So I came across a very affordable Liqui Moly LM48 paste and paid about $7 for a small package and have done dozens of services with it successfully. I also tried PTFE lubricants, but they are not as good and are also expensive (and poisoned)...
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