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?? Vspec Engine Tear Down Rookie Move

?? Vspec Engine Tear Down Rookie Move

Old 06-18-2009, 09:55 PM
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Questions?? ?? Vspec Engine Tear Down Rookie Move

I dropped the piston out and did not completely pay attention to which way the piston goes in. I think I have it right.

The left side in the picture goes toward the front of the engine correct?? Bad picture sorry...


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Old 06-18-2009, 10:03 PM
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That is correct, the short side to the front and the long side to the exaust port, also be sure the rod is done correctly as well, some say on the stad v spece engine it dont matter but it does, on the bottom rod bushing, one side of the bushing will be flat, the other side will be chamfered in or down, this side needs to face the front of the engine.
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Old 06-18-2009, 10:09 PM
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Originally Posted by Mr. Twister View Post
That is correct, the short side to the front and the long side to the exaust port, also be sure the rod is done correctly as well, some say on the stad v spece engine it dont matter but it does, on the bottom rod bushing, one side of the bushing will be flat, the other side will be chamfered in or down, this side needs to face the front of the engine.
+1 good info.

I guess I don't really need to confirm Brian's info though.
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Old 06-18-2009, 10:11 PM
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Old 06-18-2009, 10:12 PM
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Its a speed engine does that matter?
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Old 06-18-2009, 10:14 PM
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Originally Posted by Frank L View Post
Its a speed engine does that matter?

the speed will have an oil hole on the same side as the chamfer, it goes to the front as well
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Old 06-18-2009, 10:21 PM
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Thank you Mr. Twister. That helps. Putting it back together now.
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Old 06-18-2009, 10:23 PM
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Originally Posted by Frank L View Post
Thank you Mr. Twister. That helps. Putting it back together now.
anytime
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Old 06-18-2009, 10:25 PM
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Originally Posted by Jaz240 View Post
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Old 06-18-2009, 10:28 PM
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Originally Posted by Frank L View Post
I dropped the piston out and did not completely pay attention to which way the piston goes in. I think I have it right.

The left side in the picture goes toward the front of the engine correct?? Bad picture sorry...
Don't feel bad, when I was putting my V-Spec back together last week I was wondering the same thing lol. Luckily I found an exploded view of the engine that showed the piston direction.
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Old 06-18-2009, 10:31 PM
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make sure you put the piston at the top before you push the backplate in....
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Old 06-18-2009, 10:32 PM
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Pretty much any rear exhaust piston goes in with the skirt facing the rear of the engine. The v-spec WILL run with the piston backwards. Not well, but it will run. Most engines won't even turn over with a piston in backwards.
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Old 06-18-2009, 10:43 PM
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I'm gonna copy a post from another thread over here since this one is getting some hits. I have an issue that's making me nuts, I can't seem to figure it out!


I just had a mild pinch done to the sleeve, I'm doing the break in on it and it seems like when I let off the gas when I'm buzzing around the parking lot it is almost jake braking. It makes this puttering noise like your car would if you had a standard trans and let off the gas while in a low gear.

I have never heard an engine do this before, it seems rather odd. Also forgot to metion it's installed in a Losi 2.0T with a fresh clutch.

Temps are 220ish and it stops if I hit the brakes. It only does it if I give it a fair amount of gas and let it coast. But as I said the instant you brake it stops.

My initial guess is it's the front bearing, but it seems to run rather stable and at good temps and has insane power. So at this point it's hard to tell.
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Old 06-18-2009, 10:51 PM
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Originally Posted by JAMMINKRAZY View Post
Pretty much any rear exhaust piston goes in with the skirt facing the rear of the engine. The v-spec WILL run with the piston backwards. Not well, but it will run. Most engines won't even turn over with a piston in backwards.
only when it is wide open will it run with the piston backward's, at that speed the motor just barley has enough case preasure to feel the ports, the rest goes out the exaust due to the piston skirt being to short, exaust opens right up at TDC when installed that way, so do it the right way, it's much more fun
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Old 06-18-2009, 11:06 PM
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Originally Posted by imaxx21 View Post
make sure you put the piston at the top before you push the backplate in....
+1..........i pay expensive lesson when i remove the backplate with move the piston to the top...my piston skirt broke
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