Hi when I shoot my gamo bone collector bull whisper white smoke fills the barrel after the first shot so I wad wondering if anybody can help me out by telling me why tgat is and how to prevent it.
White smoke in the barrel
- Thread starter Isaacm11
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Is this a new gun? Could just be oil in the barrel burning off. Have you cleaned the barrel yet?
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AWShat you are experiencing is something what call diesling (from diesel car endgines where oil explosion is ignited not from a spark but from high pressure). It happens when there is some oil in pressure chamber. It should not happen to often or even never. So if that happened ones or twice - that should be ok. If your gun dieseling for next 50 shoots that mean that there is to much oil on spring and outside of your piston and with every shoot that excess oil is dropping to your pressure chambe and that is not good for your gun and for your gun accuracy.
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Yes, as sfx says it's dieseling in the compression chamber
If you strip the gun down and clean out all the oil and grease from the piston, spring and cylinder, then use moly grease very sparingly, everything will be good
Likely your rifle does not have a piston sleeve - a sleeve stops oil and grease from being flung onto the cylinder where it then gets ignited by the piston on the next shot
If you strip the gun down and clean out all the oil and grease from the piston, spring and cylinder, then use moly grease very sparingly, everything will be good
Likely your rifle does not have a piston sleeve - a sleeve stops oil and grease from being flung onto the cylinder where it then gets ignited by the piston on the next shot
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Not every airgun have to have piston sleeve. If it is a new airgun it - in most cases - can be a reason of putting much to much grease into airgun.
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The gun isn't new I bought off my friend a month or 2 but thanks everyone ill take it apart today and see whats going on with it
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Two causes, either excess lubrication getting past the piston seal, or a bad piston seal allowing lube to getting into the "compression" area, or perhaps BOTH. Any petroleum based lubes like molly paste and "tar" are based on "dinosaur oil" and will detonate when compressed, similar to the diesel engine.
To get away from dieseling in my piston guns I completely stripped them of "dieseling petroleum based lubes" and replaced the lubes with Dupont Krytox GPL205 which doesn't diesel (create smoke and/or bang). When a piston gun diesels the internal pressures spike stressing the internal components.
Decades ago when I started messing with "HW springer tunes" I had replaced the spring kit of my .20 R9 with a brand new Maccari spring. When reassembling the R9 I evidently got a wad of molly paste in front of the piston seal. The first shot over the chrony came with a LOUD BANG and the chrony registered 1100fps with a 11.5 grain Beeman FTS pellet (300fps above normal)! That single detonation broke the brand new high grade aftermarket spring when the piston rebounded from the detonation while the spring coils were surging forward. Even with a gas ram I can't imagine where piston rebound from dieseling would be good for the piston seal, breech seal, or the ram itself.
Anywhoo.......perhaps a tear down is needed to look at the piston seal and general lubing.
To get away from dieseling in my piston guns I completely stripped them of "dieseling petroleum based lubes" and replaced the lubes with Dupont Krytox GPL205 which doesn't diesel (create smoke and/or bang). When a piston gun diesels the internal pressures spike stressing the internal components.
Decades ago when I started messing with "HW springer tunes" I had replaced the spring kit of my .20 R9 with a brand new Maccari spring. When reassembling the R9 I evidently got a wad of molly paste in front of the piston seal. The first shot over the chrony came with a LOUD BANG and the chrony registered 1100fps with a 11.5 grain Beeman FTS pellet (300fps above normal)! That single detonation broke the brand new high grade aftermarket spring when the piston rebounded from the detonation while the spring coils were surging forward. Even with a gas ram I can't imagine where piston rebound from dieseling would be good for the piston seal, breech seal, or the ram itself.
Anywhoo.......perhaps a tear down is needed to look at the piston seal and general lubing.
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I think it could just be a dirty barrel with lube or that, " rust preventive" in it that smokes if you don't clean out the barrel bore first.
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