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All Forums >> RC Cars, Buggies, Trucks, Tanks and more >> RC Car Engines >> Car Nitro & Gas Engines >> Engine Rebuild O.S. 30
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Engine Rebuild O.S. 30 - 6/20/2008 5:34:23 PM   
Pontiac K



Posts: 225
Joined: 9/15/2007
From: Downers Grove, IL, USA
Status: offline 		I am looking at a used RC that needs it's O.S. 30 rebuilt. I would be new to nitro, but have a hobby shop and RCU if I get confused. About how much would it cost to rebuild it? Could I handle the rebuild? I have some experience with 1:1 engines. Thanks

Pontiac K

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Ever take it off any sweet jumps?
Napoleon Dynamite
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RE: Engine Rebuild O.S. 30 - 6/20/2008 10:12:55 PM   
Argess



Posts: 372
Joined: 1/12/2006
From: Pleasantville, NS, CANADA
Status: offline 		You have to inspect it to find out what you need. Could be just a piston and sleeve. Maybe a con-rod. Might also need bearings. My rule of thumb is to price up the parts and if they total less than 50% of the replacement cost of engine, go for the re-build.

This may explain why cheap engines are often not worth rebuilding.

I just bought a new OS 30VG late last year. Was about $225. I'd spend $112.50 to rebuild it when the time comes.

Oh...yes, a rebuild isn't hard. You may want some advice on bearing removal should you need to swap them out. There's lots of info and articles on the net that cover it step by step.

< Message edited by Argess -- 6/20/2008 10:14:48 PM >

(in reply to Pontiac K)
       Post #: 2

RE: Engine Rebuild O.S. 30 - 6/21/2008 1:16:36 AM   
Pontiac K



Posts: 225
Joined: 9/15/2007
From: Downers Grove, IL, USA
Status: offline 		I think that it might add up to be a little pricey. I'll have to find out what needs replacing. You said you'd spend that much, but would it cost that much, worst case? About how many gallons more would the motor take? Thanks

Pontiac K

_____________________________

Ever take it off any sweet jumps?
Napoleon Dynamite

(in reply to Argess)
       Post #: 3

RE: Engine Rebuild O.S. 30 - 6/21/2008 11:33:26 AM   
Argess



Posts: 372
Joined: 1/12/2006
From: Pleasantville, NS, CANADA
Status: offline 		Here's the parts list and prices at Tower Hobbies:

http://www3.towerhobbies.com/cgi-bin/WTI0005P?I=OSMG2078&P=Z

If the engine is worn out, the minimum is a piston and sleeve @ $65. Most people would change out the connecting rod at the same time and that's an extra $22. So, typically you'd pay $77 plus shipping (and possibly tax) to get the parts to rebuild an OS 30VG.

Worst case?.....check out the rear bearing.....a whopping $51 and another $21 for the front bearing. Adding all this up, you could easily pay $149 just for parts.

How long will it last? I really can't say. Sorry.

(in reply to Pontiac K)
       Post #: 4

RE: Engine Rebuild O.S. 30 - 6/21/2008 12:47:46 PM   
iamnot


 

Posts: 1043
Joined: 9/18/2007
From: noyb, USA
Status: offline 		if you're gonna spend that money on parts go ahead and replace all the rubber seals and o-rings too
including for the carb
and get new head shims while you're at it

the thing about rebuilding an engine is there's no guarantee on it
you could spend $100 - $200 on parts and if the engine tanks for some unseen/unknown reason
you have no recourse

argess's 50% rule of thumb is good and rebuilding one of these engines is stunningly easy
but
for a nitro newb i recommend just spending the few extra dollars and getting a new, warrantied engine

_____________________________

two kinds of people i never believe - fanboys and haters
they never tell the whole truth

(in reply to Argess)
       Post #: 5

RE: Engine Rebuild O.S. 30 - 6/21/2008 1:03:07 PM   
Argess



Posts: 372
Joined: 1/12/2006
From: Pleasantville, NS, CANADA
Status: offline 		Thanks IAMNOT....I sort of like my "rule of thumb"........LOL.

(in reply to iamnot)
       Post #: 6

RE: Engine Rebuild O.S. 30 - 6/21/2008 1:34:19 PM   
hkenvy91


 

Posts: 876
Joined: 4/11/2007
From: richmond, VA, USA
Status: offline 		just buy a new motor would be your best bet! often motors cost to much to rebuild!! i got 2 heres right now in that condition but just really not worth rebuilding

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kyosho strr,airtronics M8,o.s.speed,jp-3,tilted fuel

(in reply to Argess)
       Post #: 7

RE: Engine Rebuild O.S. 30 - 6/22/2008 4:51:21 AM   
Pontiac K



Posts: 225
Joined: 9/15/2007
From: Downers Grove, IL, USA
Status: offline 		Thanks for the responses. I'm not going to get that one and think I'm going to stick with the cars I have for now.

Pontiac K

_____________________________

Ever take it off any sweet jumps?
Napoleon Dynamite

(in reply to hkenvy91)
       Post #: 8

RE: Engine Rebuild O.S. 30 - 6/23/2008 4:28:18 PM   
supermod


 

Posts: 125
Joined: 8/6/2007
From: lisbon falls, ME, USA
Status: offline 		that sleve is made of swiss candy...very soft..stay away from the vg series of engines

_____________________________

raze .28rr,17t,jp-2,spiral diffs,lightened cups/o.s .30vg modded/hyper 7 .21 8p,nothin but OD plugs and fule!

(in reply to Pontiac K)
       Post #: 9

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All Forums >> RC Cars, Buggies, Trucks, Tanks and more >> RC Car Engines >> Car Nitro & Gas Engines >> Engine Rebuild O.S. 30
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