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Old 07-09-2009, 03:30 PM   #1
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Default GRP Engine Tooling Kit Question

Well my GRP engine tooling kit just arrived today. I tried using it to remove the bearings and the sleeve from the LOSR2300 engine. This is the stock engine that comes with the Losi 2.0 8ight RTR buggy.

It made taking the back bearing out incredibly easy. I am not having as much luck with the front bearing. It seems like to diameter of the GRP tool is too big to fit in the case.

I compared its diameter to that of the crankshaft that I removed from the case and it is noticeably bigger (20-30%).

So here is the question. Has anyone used the GRP kit to remove the front bearing from this engine? Has anyone used this kit to remove the front bearing from any .21 engine?

I called Losi tech support and the guy on the phone called Adam Drake who said it should work. I don't want to force it and damage the engine case or the GRP tool.

Anyone have thoughts?
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Old 07-09-2009, 03:48 PM   #2
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sometimes its difficult to get exact answeres in this hobby/sport. this tool sounds nice! maybe w/grp burning there will be some of these going closeout.

I wouldnt force it. even if i have to call back several times before i actually make it work and hear horizon say yes its ok. gouges in cast blocks can be bad especially inside(the block). hey man i might send you some stuff to work on lol
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Old 07-09-2009, 04:02 PM   #3
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jax not sure on the size of that engine but the rear is the hardest by far to take out but if your not able to stick the tool all the way through then you wont be able to install the new bearings with it.
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Old 07-09-2009, 04:21 PM   #4
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the GRP tool will only work on a 7mm id front bearing what size is the
crank at that end
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Old 07-09-2009, 04:46 PM   #5
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Quote:
Originally Posted by cary View Post
the GRP tool will only work on a 7mm id front bearing what size is the
crank at that end
Unfortunately, I don't have my calipers yet. I checked the bearings and they are the same bearings as are used in the .28 engine.
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Old 07-09-2009, 04:48 PM   #6
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Quote:
Originally Posted by Jonathan Bell View Post
jax not sure on the size of that engine but the rear is the hardest by far to take out but if your not able to stick the tool all the way through then you wont be able to install the new bearings with it.
I just realized that too. Hopefully my calipers arrive soon so I can measure the crankshaft thickness and compare it to the tool. I am almost certain the opening in the case is too small.
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Old 07-09-2009, 04:52 PM   #7
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In the meantime, I am going to use the tried and true method of heating. We'll see if my heat gun can get it hot enough.....
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Old 07-09-2009, 04:53 PM   #8
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The tool fits in there with hardly any effort at all I have never had to force it in any engine yet.
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Old 07-09-2009, 05:01 PM   #9
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Originally Posted by Jonathan Bell View Post
The tool fits in there with hardly any effort at all I have never had to force it in any engine yet.
That was my experience when I took out the rear bearing. :-(

So I am pretty sure this is not going to work.
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Old 07-09-2009, 05:03 PM   #10
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Originally Posted by 8&stuff View Post
hey man i might send you some stuff to work on lol
You should do so at your own risk
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Old 07-09-2009, 06:01 PM   #11
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In the meantime, I am going to use the tried and true method of heating. We'll see if my heat gun can get it hot enough.....
Well I took the front bearing out using the oven method and then confirmed that the GRP kit tool was too big to fit in the opening. It was difficult to do with the back opening but it was definitive with the front opening.

The next question is what .21 engines does this tool work on and why are .21 engines different?

Thoughts?
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Old 07-09-2009, 06:06 PM   #12
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It won't work with that engine. It only works with engines that have larger than 13mm cranks. Most .21 engines are larger than 13mm. So to answer your question, you are correct, the tool has too large of a diameter for that engine.
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Old 07-09-2009, 06:17 PM   #13
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Default grp tool

do you want to sell the tool thanks j-dub
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Old 07-09-2009, 06:23 PM   #14
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do you want to sell the tool thanks j-dub
J-Dub,

No thanks. I will upgrade my engine at some point and probably buy a truggy too. I'm sorry the tool will be good to me on my future engines.

Besides - it just arrived today so I could easily return it and get full price back.

Thanks though.
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Old 07-09-2009, 06:24 PM   #15
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Quote:
Originally Posted by JAMMINKRAZY View Post
It won't work with that engine. It only works with engines that have larger than 13mm cranks. Most .21 engines are larger than 13mm. So to answer your question, you are correct, the tool has too large of a diameter for that engine.
That's good to know for sure. I'll keep that in mind if and when I upgrade the engine.
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