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Old 05-18-2006, 06:06 PM   #16
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bump
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Old 05-18-2006, 06:15 PM   #17
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what fuel are you running? have you added the extra head shim?
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Old 05-18-2006, 07:06 PM   #18
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Sounds like your engine is detonating.....

Are you running the extra shim??? If you aren't, the motor is overheating and fouling the plug.
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Old 05-18-2006, 08:36 PM   #19
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No i have not added any shims. Do you think that the engine can be saved?

Highlights from post above:
The piston head is black
blowing glow plugs once a week.
The sleave is dark color
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Old 05-18-2006, 09:30 PM   #20
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i would suggest you take engine apart & give it a good clean with parafin oil (buy it at chemist). then add the extra head shim that come with the v-spec, place a new plug in the engine & i would also suggest resetting the needles to 3 turns out top & bottom. it does not hurt to start over.

also it might pay to change the fuel your using aswell even though i'm unsure of what it is? but could be the cause of your engine going black also.
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Old 05-19-2006, 07:16 AM   #21
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I had a similar problem on one of my previous motors (picco). I ran 30% nitro and didn't shim it properly. That plus the rear exhaust gasket kept tearing and leaking air in blackened the piston and sleeve. You can definitely tell when the motor is detonating like I think yours is. It's most notible when making a few high speed passes and then bringing the car in, the idle from high to low is not smooth at all...

Needless to say running it that way my motor didn't last very long Shim it and check for an air leak around the rear exhaust or glow plug area...
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Old 05-19-2006, 08:49 AM   #22
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Thanks for the info.

I will Clean the engine and add the shim. It was sounding very bad.
Come to think of it. I have ran more then 5 gal. threw this engine. I am guessing it was more like about 8 or more gals.
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Old 05-19-2006, 09:11 AM   #23
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At 8 gallons, it is very likely that it's time to replace the piston, sleeve, and rod.

Is there a lot of slop in the crank pin to rod fit?
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Old 05-19-2006, 10:56 PM   #24
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i've got new, replacement tko ceramic bearings ordered. are there any special tools needed in order to remove the old bearings and install the new ones? if so.....where do i get these tools? thanks.
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Old 05-22-2006, 12:48 PM   #25
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No special tools needed.

Strip the engine down to nothing but the bare block w/bearings. Make sure the carb insulator comes out with the carb, btw..

Heat oven to 300 degrees or so. Put engine in oven for 15-20. Remove engine (caution, engine is hot. Wear gloves, LOL). Tap the block on a hunk of wood. Bearings should drop right out. With the block still hot, press in the front bearing. Put the rear bearing on the crank and use the crank to install it.
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Old 05-22-2006, 11:05 PM   #26
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thanks for the tips.
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Old 05-23-2006, 03:29 AM   #27
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Yeah,

Thanks for the tip. I have ordered the TKO bearings. If it only gives me peace of mind, that's money well invested.

thanks
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Old 05-29-2006, 02:04 PM   #28
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Well I replaced my bearings with the TKO ceramic bearings this afternoon with the oven method. I have to say this was WAY easier than I ever tought it would be. I heated the crank case on the oven range until the oil started to smoke, held the crank case and hit it lightly on a piece of wood then the rear bearing fell off real easy. With a screwdriver, I then gave a few light hits on the front bearing from the inside and it fell off real easy too. while the case was still hot, I put the front bearing on the crankshaft and slid it in the front housing, I did the same for the rear bearing. Total duration of the replacement 10-15 minutes.

I just reassembled everything and it runs perfectly. To those having doubts about how easy it is, just try it, you'll be surprised.

Now, I can say I finally have peace of mind with my V-Spec

Last edited by Montrealer; 05-29-2006 at 04:35 PM.
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