DM5 hissing…

[homerj]

So i went out to the field today for their monthly Sunday Funday but alas nobody showed up. I haven’t played in a few weeks so i figured while i was there i might as well test my guns for next weekend’s mission day. The Mini GS shot flawlessly but the DM5 had a hiss when the bolt cycled. It wasn’t leaking or anything when the bolt was at rest & it shot ropes but it had a hiss when the bolt cycled & i could feel just a tiny puff of air from the grip frame. I had taken the bolt out & lubed it yesterday & didn't notice any damaged o-rings. Where should i start? I should mention that it was shooting in the 240’s which is significantly lower than the last time i chrono’d & played with it.

[Hobbes]

My first question is are you sure it's a DM5 and not a cat?

[Cdn_Cuda]

Press the reset button at the backs. You’ll quickly be able to identify whether is in fact a cat. (Not responsible for damage cause by resetting cat).

[homerj]

Well you know if you hadn’t said anything i would have said i was positive it was a DM5 & not a cat. Now I’m questioning it. One second……………………ok it’s definitely a DM5. I kind of wish it was a cat. Then at least the hissing would be normal.

[tyronejk]

A tiny puff of air from the solenoid when firing is normal, although it shouldn't be so much air that you can feel it come out from behind the grips.

[Trbo323]

Check your LPR pressure. I would suspect too high but too low could also cause issues

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[Ecapnation]

Was there a significant temperature change since last use? Dms especially early ones hated the cold. More so with any lube that was excessively applied and got thicker in cold weather

[homerj]

Thanks for the responses guys. It’s all good now. As usual it was something simple that should have been immediately obvious.

[Trbo323]

Thanks for the responses guys. It's all good now. As usual it was something simple that should have been immediately obvious.

Which was........

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[martix_agent]

Which was........

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being that it's a DM5, the likely answer is that it was an oring, or that the regulators were set too high, or lack of lubrication.
...or the cans were not screwed together completely.

[homerj]

Let me preface this by saying up front that I’m not what the kids nowadays call “smart”. My daughter's husband had been messing around with the DM5 when i wasn’t there & had unscrewed the HPR about 1/4 turn. It wasn’t immediately noticeable under pressure. He had also started to cross thread the tank but luckily stopped before doing any damage. Needless to say i moved the spare key.