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Post by Seagem on Sept 5, 2013 13:42:04 GMT
Does anyone know what the valve clearances are on a Yanmar 4JH4E please?
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Post by Mistroma on Sept 6, 2013 20:05:00 GMT
Following information is a bit confusing, perhaps someone else can clarify. I'd guess that page 4 is referring to the clearances you need and page 7 is referring to another clearance on the tappet (can't think what at present).
Source: Yanmar JH4 Series Service Manual, 2007 edition.
Section 5 Page 4: Valve Clearance -Intake / exhaust 0.2 ± 0.05 mm (0.0079 ± 0.0020 in.)
Same across the JH4 range according to the document
Section 5 Page 7: Tappet clearance 0.010 +0.033 / +0.080 mm (0.0004 +0.0013 / +0.0031 in.)
I believe that the clearances are the same for both the 3JH4E & 4JH4AE according to document
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Post by electricmonk on Sept 7, 2013 9:29:56 GMT
My overhaul manual for the 4JH series of engines states 0.20 mm +- .05 mm COLD for all variants engine at TDC.
that's an 8 thou .008" feeler gauge in old money.
incidentally the rule of 9 also works with this engine.
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Post by Seagem on Sept 7, 2013 9:48:56 GMT
Thanks guys! 8 thou sounds about right to me! Is the service manual available online? Or can you tell me where to get one from?
Cheers
Andy
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Post by Anwen (Deep Joy) on Sept 7, 2013 16:46:33 GMT
Following on from this, would someone happen to know the valve clearances for the 3YM30? Mine has now gone well past 50 hours and the tappets should be checked as part of the first oil change service, but of course, the valve clearances don't seem to be given in the owners manual.
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Post by Mistroma on Sept 11, 2013 22:05:48 GMT
Yanmar Service Manual for 3YM30/3YM20/2YM15 (Doc. 0BYMM-G00100, 2007 I think) says:
Section 5.2.8 page 115
Make adjustments when the engine is cool
Inlet and exhaust valve clearance 0.15 - 0.25 mm
I hope that this helps.
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Post by electricmonk on Sept 12, 2013 19:18:01 GMT
Thanks guys! 8 thou sounds about right to me! Is the service manual available online? Or can you tell me where to get one from? Cheers Andy try here www.motoren.ath.cx/ |
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Post by Anwen (Deep Joy) on Sept 24, 2013 16:11:41 GMT
Thanks Mistroma. After posting my request above, I googled for the 3YM30 service manual, and immediately found a link to a downloadable copy, which is below: 3YM30 Service ManualThis was a real surprise to me, as I have tried to find the 2GM20F service manual in the past with no luck. Obviously, I have downloaded a copy of the pdf and have it on my iPad and laptop! There are also links for the 4JH4E manual, but I didn't check them out to see if they are a downloadable pdf version, or are on-line in a reader. |
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