jpan
ArboristSite Member
I put it to about 27ft lbs and was still leaking. I’ll give her a little more and hope the threads hold. Lol
Stihl 034 won't start & needs top end kit
- Thread starter jpan
- Start date
Help Support Arborist Forum:
go by an auto parts store and get a copper washer, remove the original washer on the plug. Get a kinda thick copper washer
cuinrearview
Red saw lover
I bet he's just not crushing the washer. The Denso plugs I use are pretty stiff.
jpan
ArboristSite Member
Im pretty sure I can feel the washer flatten out. I’ll give it a couple more ft lbs and see if it seals if not may try the copper washer suggestion.
There is one thing really good about this thread. Sometimes the engine may not run well even with a fresh plug. Change the plug and the engine may start to run well again because the "fresh" one was leaking. A leaking plug can rob compression. One for the books.
jpan
ArboristSite Member
im with ya on that! I put a second plug in it and same thing. I noticed when I did initially pressure test it after assembly that it was leaking at the plug and the decompression port. I installed the plug that came with it rather than a decomp valve. I had to tighten both to stop the air leaks. I’m guessing the plug seals well enough to pass the 7-8psi pressure test but not enough to seal with compression.
cuinrearview
Red saw lover
Assuming you're using good name brand plugs there's really only two reasons for a leak there. You're not tightening it enough or the jug is effed. So more tightening won't hurt anything. I'm not sure where it says 27ft/lbs but that's not nearly enough.
jpan
ArboristSite Member
the service manual for it says 25nm which is around 18ft lbs. As long as the threads hold I’ll give it more tomorrow. The jug looks and feels perfectly flat but I’ll double check again for sure.
Attachments
cuinrearview
Red saw lover
No way that Nancy **** would compress the washers on a W22MPR-U...
I mostly use German torque that be Gutentight
You best get a copper washer or you may be replacing that China cyl sooner than later
By the way I am speaking from experience on using that copper washer, it will seal it, will also seal a poorly fitted insert
jpan
ArboristSite Member
ill do that and re-torque. Thanks!
Circlip installation is Voodoo
I thought it was snizentite.
Or husky snizenlooze.
jpan
ArboristSite Member
well I tried the copper washer trick today. They didn’t have an exact fit so I had to slightly punch one out with the drill press. Torqued it down and it does seem like it’s sealing now. Crossing fingers it stays that way!
The only remaining issue seems to be the 036 muffler I bought doesn’t fit up right to the exhaust port on the cylinder at the bottom of the port. There’s a gap there so it’s expelling some I burnt fuel from running rich still. Is there a spacer I need to buy or anything? Double gasket?
You can go one of two ways; you can make a spacer to bridge the gap, or, cut the top cover so the muffler can fit. I would make a spacer. It can always be removed but the top cover can't be restored (not without a lot of work, anyway).
drf255
BAD CAD
Is the muffler AM?
An 036 muffler should fit an 036 Jug perfectly on the 034 chassis. The top cover front air dam needs to be trimmed to clear the large 2nd fin on the jug, not the muffler.
The later MS360 and 036PRO came with heat shields. This may be what you are missing.
jpan
ArboristSite Member
Correct the muffler is AM. I’ve got the top cover trimmed and fits perfect. It looks like the muffler is a hair too short. The ears that mount to the chassis won’t let it sit back far enough to fit right against the jug.
Does your saw have the heat shield (cooling plate)? That plus the gasket should seal it. If not, you may have an aftermarket fit problem. Should be easily fixable with a spacer.
