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Old 02-13-2009, 04:26 PM   #1
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Default airleak question

i tore a friends motor down for him to check out things <rb s3>. everything looked good. got it back together and fired it up, problem is i cant get it to idle down. i thought maybe it was lean on the bottom so i basicly went back to stock settings and still idles very high, enough to engage shoes.after 15-20 seconds it settles down once it loaded up the crankcase. i sealed the back plate but not the carb. im thinkin airleak! what do you think?
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Old 02-13-2009, 05:13 PM   #2
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Your probably right. I heard of a neat trick from a guy on here to check the front bearing for an air leak. Take the clutch and flywheel off and put a little bit of soapy water on the bearing and turn the motor over, if it bubbles, you have a problem and need to replace the bearing. I'm sure there are some other guys on here that can give you some more advise. Good luck
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Old 02-13-2009, 06:44 PM   #3
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front bearing's are not 100% sealed....they are meant to leak a little when the motor's not in use just sitting there....if the Chassy is Soaked underneath the motor in very little run time then you have a problem....a little wetness around the front bearing is normal.
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Old 02-13-2009, 06:57 PM   #4
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front bearing's are not 100% sealed....they are meant to leak a little when the motor's not in use just sitting there....if the Chassy is Soaked underneath the motor in very little run time then you have a problem....a little wetness around the front bearing is normal.

+1, the oil in the fuel actually lubricates the bearings in your engine..its more of a problem if they are not leaking a little.
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Old 02-13-2009, 07:31 PM   #5
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This might be obvious, but did you check the fuel lines? A slight cut can create those issues.
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Old 02-13-2009, 07:52 PM   #6
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fuel lines are fine, checked them already

im pretty sure its a leak around the carb since i didnt bother to seal it! doin that tonight
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Old 02-13-2009, 08:07 PM   #7
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Quote:
Originally Posted by crawldad91 View Post
fuel lines are fine, checked them already

im pretty sure its a leak around the carb since i didnt bother to seal it! doin that tonight


make sure to Use the proper stuff.....Racer's Edge carb sealant, Lucky 7 sealant....or my fav Three bond 1211.
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Old 02-13-2009, 09:38 PM   #8
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ive used high temp RTV with great success
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Old 02-14-2009, 12:03 AM   #9
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ive used high temp RTV with great success

i have to. integra has told me it doesnt work. but he is the ONLY person to ever say different and when results prove my findings i guess hes not always right (sorry lol)
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Old 02-14-2009, 06:59 AM   #10
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i have to. integra has told me it doesnt work. but he is the ONLY person to ever say different and when results prove my findings i guess hes not always right (sorry lol)

Integra wont steer you wrong..RTV silicone will work, but not as well as the 3 brands he recommended.. The silicone is soft, and can break down or tear and enter your engine..especially if you dont know what you are doing.
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Old 02-14-2009, 07:14 AM   #11
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Quote:
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ive used high temp RTV with great success


RtV will work temporarily...but for a long term seal job that is by far the worst stuff to use....Nitro Eats at RTV and it may appear to be sealed..but in reality the RTV is melting from the inside out....for example...take 2 blob's of RTV...let then sit and dry in the plain air...toss 1 dry toss one in a small cup with some nitro Fuel....see what happens to the RTV after a couple hours....it basically breaks down and turns to mush


losi_racer....you got some nerve you know.
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Old 02-14-2009, 07:54 AM   #12
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while engines running to check air leaks i squirt carb cleaner on the area where leaks are possible, if engine dies then you gots a leak
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Old 02-14-2009, 10:06 PM   #13
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losi_racer....you got some nerve you know.

i call it how i see it. ive never had an issue with my motors being sealed other then a case cracking but i wont get into that
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Old 02-15-2009, 07:44 AM   #14
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i call it how i see it. ive never had an issue with my motors being sealed other then a case cracking but i wont get into that

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Old 02-15-2009, 12:44 PM   #15
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why do u see things as your always right. your a smart guy im not going to deny that but sometimes not often but sometimes your not 100% right and you still think your right and every one is wrong
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