Thread: mk4 is leak
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Old 2nd December 2010, 12:27 PM
peadar_911's Avatar
peadar_911 peadar_911 is offline
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Join Date: Oct 2009
Member of: Quarry Hunters
Location: Carmarthenshire
Posts: 263

Originally Posted by pete53 View Post
Filled up to 220 on Sunday now at 190. Tried a balloon on the filler valve no leak there. Is there anything else I can try before sending back for the 4th time in 6 mths. Does it effect the fps consistency of the gun.
Thanks Pete
Hi Pete

Mine developed a small leak on the actual cylinder end during the summer. I only found the leak by dousing the cylinder and action in soapy water. I had to bleed the system down, remove the end of the cylinder (the bit the filler valve screws into) clean and recoat the "O" rings with silicon grease and reassemble. This isn't a job that everyone would be happy to tackle, and it may not not even be the problem on your rifle.

I have also removed the AT, so was able to strip the gun completely, ensuring that no water was left where it shouldn't be.


PS It wont affect your MV unless the pressure drops below what you normally shoot at.
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