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is it safe to assemble my engine in the winter cold?
Posted 06 February 2013 - 11:11 AM
has anyone assembled in the cold and had success or run into problems?
i was contemplating building a rocket mass heater to try to heat it up quicker
Posted 06 February 2013 - 11:15 AM
Posted 06 February 2013 - 11:22 AM
Ivan, what are you referring to about glue here? gasket sealant? want to make sure im not missing something.
i know RTV is probably not a good idea to use as its no where near room temp etc.
Posted 06 February 2013 - 11:26 AM
Posted 06 February 2013 - 11:39 AM
i read that you werent supposed to use anything on the headgaskets???
i did have the heads resurfaced. guy said he took .006 off, i performed a little redneck resurfacing per Monstarus thread as well. not much tho and mostly was with 400 grit wetsand.
im a little timid to build this with my .040 cometic gaskets. i want to slide an old headgasket in there and mock it up for a test so i'll know if i have to get thicker gaskets. i know people run all day long on the .040 with no issues but we'll see, might have a set for sale in the for sale forum soon LOL
from what i could tell from research and measuring, the piston comes out .019" from the block (half a mm or so), hope i got the clearance for the vavles!
Posted 06 February 2013 - 02:53 PM
As long as all your parts are the same temperature(ambient) then there should be no issue.
Posted 06 February 2013 - 03:40 PM
The only time an engine assembly may be problematic in the cold is if you were blueprinting the engine. Assembly of an engine where you are not checking every critical dimension to get in the middle of a tolerance doesnt really care if you get frostbite.
I would however use warm engine oil for the first start up (sotre it in the house till needed) just to make life easier for the engine.
Posted 06 February 2013 - 03:48 PM
Don't worry about ambient temperature, even RTV will cure in "well digger's rump roast" cold temperatures.
Don't worry about running an .040 HG and don't waste time mocking it up with an old one. I decked my heads .010 and have no clearance issues, am running .040 Cometic MLS gaskets, and I'm running high lift cams.
Posted 06 February 2013 - 11:01 PM
Posted 07 February 2013 - 12:58 AM
Cold wont hurt it. Ive done head gaskets in sub- freezing temps with little-no heat plenty of times.
The engines used in Formula 1 cars have to be assembled at operating temperature because the clearance between the pistons and cylinder walls is so tight they don't actually fit together when cold. The engines practically seize when cold because the metal contracts more than the clearance.
A Subaru engine isn't made quite like that. Slap it together. Just follow the directions for the head torque sequence.
Posted 07 February 2013 - 10:12 AM
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