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Old 08-13-2008, 12:11 PM   #16
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I just got my first V-spec on monday and broke it in yesterday. But I was checking it out when I got it and noticed that the piston was in backwards! So that would definietly be something I would check because if they can put it together backwards on mine then they could have put it in backwards on yours too. Also mine came so rich it would barely start.
If that was the case, the piston skirt would have been damaged the first time it was turned over.
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Old 08-13-2008, 12:12 PM   #17
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I just got my first V-spec on monday and broke it in yesterday. But I was checking it out when I got it and noticed that the piston was in backwards! So that would definietly be something I would check because if they can put it together backwards on mine then they could have put it in backwards on yours too. Also mine came so rich it would barely start.
I would always check out ANY non modded engine, as these engines are mass produced, and thing like that happen. I would also inspect the carb for any factory defects, ripped o rings ect.... I have seen these mistakes happen before in V specs. I've seen pistons in backwards before,, also have seen broken pistons, brand new right out of the box.
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Old 08-13-2008, 12:13 PM   #18
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If that was the case, the piston skirt would have been damaged the first time it was turned over.
Wrong!
The engine will run with the piston in backward. Trust me!
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Old 08-13-2008, 12:18 PM   #19
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oops, My bad! I guess I'm used to Italian motors.

I would agree that it's always a good idea to make tear it down and make sure it's put together correctly.
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Old 08-13-2008, 12:18 PM   #20
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Nothing is visibly broken, we have disassembled the engine 3 times! There are only 2 possibilities left.

1. Leaky front bearing.
2. Crankcase has a hairline crack, which is not visible to the naked eye, or to the spotlight, and magnifying glass!

I am going to do 1 final break down on Friday, and and I will let you all know what I find.
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Old 08-13-2008, 12:21 PM   #21
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oops, My bad! I guess I'm used to Italian motors.

I would agree that it's always a good idea to make tear it down and make sure it's put together correctly.
it's ok... yeah most other engines it wont run... the spec has a long rod short stroke.
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Old 08-13-2008, 12:25 PM   #22
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Nothing is visibly broken, we have disassembled the engine 3 times! There are only 2 possibilities left.

1. Leaky front bearing.
2. Crankcase has a hairline crack, which is not visible to the naked eye, or to the spotlight, and magnifying glass!

I am going to do 1 final break down on Friday, and and I will let you all know what I find.
Is the engine wet after running it? Also try looking for the crack with a jeweler x10 eye piece. most of the time the cracks are straight down the center of the case on the raw material line. look there..
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Old 08-13-2008, 12:53 PM   #23
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Ok, Thank you I will look there. Lets just say the case does have a crack. I have never encountered that problem before. How would I go about sealing that? Would silicone do it, or would I need to weld it closed? Please advise proper repair, that is one thing I have not ever done
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Old 08-13-2008, 01:00 PM   #24
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Ok, Thank you I will look there. Lets just say the case does have a crack. I have never encountered that problem before. How would I go about sealing that? Would silicone do it, or would I need to weld it closed? Please advise proper repair, that is one thing I have not ever done
There is no repair for a cracked case.... You'll have to buy a new case..
Is the engine wet after running?
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Old 08-13-2008, 01:52 PM   #25
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I've seen 3 OS V-specs with cracked cases in the past 3 or 4 months at my local club track where there are only about 50 members & way less than half of the members run v-specs.
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Old 08-13-2008, 02:20 PM   #26
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There is no repair for a cracked case.... You'll have to buy a new case..
Is the engine wet after running?


I don't remember wet or not, I will let you know later. I'm at work now, and did not bring my V-spec with me, lol
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Old 08-13-2008, 03:04 PM   #27
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Jaz, i left you a post in the Best .21 engine thread, LMK
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Old 08-14-2008, 12:09 AM   #28
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Originally Posted by Jaz240 View Post
Ok, Thank you I will look there. Lets just say the case does have a crack. I have never encountered that problem before. How would I go about sealing that? Would silicone do it, or would I need to weld it closed? Please advise proper repair, that is one thing I have not ever done
One of my three blocks had a hairline crack, now i only have two.
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