Looking for air leaks

[MaxxRunner]

Well i'm still trying to get my max running right after a new sleeve and piston. from another post on this subjuect there were several comments to check for air leaks, I replaced all the fuel line where else do I look for air leaks how do you trouble shoot the part doing it and what is the fix?

The newbie needs help!!!
MaxxRunner

 

[El Pirata]

Can you elaborate on the problems like what it's doing? Did you break in the engine after putting in a new sleeve and piston?

 

[Maxx Trooper]

check the fuel tank, make sure there is a gasket between the header and engine block.... and if u have a fuel filter make sure it sscrewed together tight and the rubber o-ring is in there

later

 

[militarymaxx]

Air leaks can be found in the following locations:

pin holes in the tubing (fix - replace it)
around the cooling head (fix - tighten it)
around the backplate (fix - tighten and seal with O2 safe silicone)
around the carb (fix - seal with O2 safe silicone)
banjo fitting (fix - replace washers, don't overtighten)
fuel supply nipple on tank (fix - seal with O2 safe silicone)
loose glow plug (fix - check metal gasket, replace if needed)
bad front bearing (fix - replace)

EP is right, we need more info. A piston/sleeve replacement demands extra special attention. You need to make sure everything is put back together properly as well as making sure all the internals are in good shape, that all the surfaces were prepped properly. After you are confident that the engine was re-assembled properly, that everything is sealed up good, make sure all your settings (LSN, HSN and idle), are set back to factory.
With a new piston/sleeve you're basically starting over and "engine break-in" will be required. Trying to run it initially with your old settings would be harmful.

 

[Digital Liquid]

As MT stated, check everything for leaks:

Here is a pretty good article on how to check for air leaks:

http://www.rchobbies.org/engine-tuning.htm

I would do this to your engine, fuel tank, and fuel filter. Just make sure that when you are done testing, you spray everything down w/ WD-40 to get the soapy water off of it.

Later...:mex:

 

[Rolex]

A guy at the local track bought a Tmaxx 2.5 used, that had just been through break in. For several days it ran really well, then it started to misbehave. Lots of tweeking, some good runs, and some bad. He just found a crack in the head, about 1/8 inch from the glow plug.
He had sprayed WD in the carb, spun the starter without the glo wire, and the WD bubbled out of the head. Not something you would normally look for.