Rhino engine carnage - Ouch! - Yamaha Rhino Forums - Yamaha UTV Forum
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post #1 of 20 (permalink) Old 06-20-2008, 01:54 AM Thread Starter
Founding Ninja
 
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Rhino engine carnage - Ouch!





Just pulled this one apart today. Stone stock, no mods other than 4 seat cage.
This is caused by lack of lubrication to the piston pin. The pin usually galls in the rod first. After the pin locks up in the rod, the only place it can pivot is in the piston. The piston doesn't like the extra abuse and in this case it disentigrated!

This is evidence that the stock rod is a pretty decent part. The rod gets a lot of bad mouthing over at RF but it really isn't the culprit usually. This rod is bent and twisted and it stayed in one piece.

The fix for this is two-fold.
1. Check the oil every day! Check it more often if you put a lot of miles on it!
2. Upgrade to a DLC psiton pin. DLC is "diamond like coating". It reduces friction substantially and basically prolongs the pin life even when there is a lubrication problem.

I put the DLC pin in all the engines I build. Money well spent.

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post #2 of 20 (permalink) Old 06-20-2008, 02:13 AM
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Ouch, ya that looks like it has seen better days!

Makes me want to go out right now and check the oil level.

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post #3 of 20 (permalink) Old 06-20-2008, 02:22 AM
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Thats ruff... and spendy. Whats a repair like that cost?
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post #4 of 20 (permalink) Old 06-20-2008, 02:37 AM Thread Starter
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Quote:
Originally Posted by mosslager View Post
Thats ruff... and spendy. Whats a repair like that cost?
Probably in the upper end of $3000 - $4000 range.

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post #5 of 20 (permalink) Old 06-20-2008, 02:42 AM
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I think I would seriously look at a R1 swap if I knew I was looking at a repair like that.
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post #6 of 20 (permalink) Old 06-20-2008, 08:59 AM
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i have an engine for sale it will be pulled soon if your intrested, we could make a deal.

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post #7 of 20 (permalink) Old 06-20-2008, 09:35 AM
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Great stuff Chris , Thanks for sharin!!! , Im still savin my money to come see ya !
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post #8 of 20 (permalink) Old 06-20-2008, 03:56 PM
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how many hours or miles on the motor????
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post #9 of 20 (permalink) Old 06-20-2008, 05:40 PM
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around 80-90 not sure of exact # i just took it out 2 weeks ago and not sure how many hrs i put on it in that trip. I will check when i get home an post it with some pics maybe

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post #10 of 20 (permalink) Old 06-20-2008, 05:45 PM
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