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aishaamadumamariama
Associate

Join Date: Jul 2009
Posts: 33

Bobcat Engine

02/24/2012 12:26 PM

Hi Comrades

I have been working on a Bobcat engine that overheat as the Lubricating oil mixed with water, I replace the head gasket after thourough flushing of bad lubricant inside the engine. After finish, engine crank without any problem but the oil becomes mixed again with water, we even double the head gasket its the same, now our plan is to take the cylinder head for surfacing, Now my comrade, is there any other advice you will give me besides the surfacing of the cylinder head

Model....Bobcat S 1300 Engine #: Y2203-M-DI-EUZ
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lyn
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Join Date: Oct 2008
Posts: 42355
Good Answers: 1693
#1

Re: Bobcat engine

02/24/2012 12:31 PM

Check the block for cracks.
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aishaamadumamariama
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#2
In reply to #1

Re: Bobcat engine

02/24/2012 12:50 PM

OK, then what nest if there's no crack or cracks in the engine
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lyn
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Posts: 42355
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#3
In reply to #2

Re: Bobcat engine

02/24/2012 1:01 PM

I'm not qualified to give any further advice. My only other thought is that if it has an oil cooler inside the radiator it may be leaking.

Try this web site: Ask a Bobcat Mechanic Now
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pantaz
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Join Date: Feb 2008
Location: Van Nuys, CA
Posts: 563
Good Answers: 33
#4
In reply to #2

Re: Bobcat engine

02/25/2012 3:29 PM

There are only so many ways for coolant/water to enter the oil system. If the engine is still assembled, perform a leak-down test on each cylinder. If no problems are identified, then pressurize the radiator and look for leaks in the block and head. After that, it's time to strip it down and have the block and head professionally inspected for cracks.

Some tips and recommendations: http://www.enginebuildermag.com/Article/2613/looking_for_leakers_crack_detection_technology.aspx
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aishaamadumamariama
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Join Date: Jul 2009
Posts: 33
#5
In reply to #4

Re: Bobcat engine

02/25/2012 3:50 PM

Hi

The engine is a dry liner engine, not wet liner, and this started after the engine overheat, however i have taken another step for the cylinder head to be re-surface, after which I will publish the outcome, nevertheless your advices, comments or what ever are still welcome.
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pantaz
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Join Date: Feb 2008
Location: Van Nuys, CA
Posts: 563
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#6
In reply to #5

Re: Bobcat engine

02/25/2012 4:19 PM

Are you having the head inspected for cracks?
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aishaamadumamariama
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Join Date: Jul 2009
Posts: 33
#7
In reply to #6

Re: Bobcat engine

02/25/2012 10:43 PM

Visually I have done that, no cracks, any other ways? NO.

Ways of checking it also welcome
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pritam
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Engineering Fields - Mechanical Engineering - New Member India - Member - New Member

Join Date: Aug 2008
Location: City of destiny, INDIA
Posts: 775
Good Answers: 67
#8
In reply to #7

Re: Bobcat engine

02/28/2012 12:38 AM

Other ways are with the help of magnifying glass and also Die Penetrant Test.
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Previous in Forum: 5KVA-50KVA Organic Rankine Cycle Turbines and Heat Exchangers   Next in Forum: Thermography Test

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