camshaft holder pressure - SV650.org

15-01-10, 04:05 AM

When unscrewing the front cyclinder exhaust central cam holder bolts , there was a pressure release.

Is this normal? Cant tell if there a channel for cooling/oil from the manual.

Red Herring · 15-01-10, 05:03 AM

Was it the last bolt you released? If so then it may have been the journal lifting off the cam and obviously they do have an oil feed, although I'd have been surprised if you still had any oil pressure given how long the engine must have been switched off by then.....

15-01-10, 05:45 AM

Just the two middle bolts, a hiss sound, the thing wouldnt come off even with all bolts out, needed a rubber hammer.

15-01-10, 06:29 AM

Yes, it is normal.

15-01-10, 07:47 AM

Oil pressure?

15-01-10, 09:53 AM

Not really oil pressure, you don't have any with motor not running. It is heat pressure build up inside bolt holes which are sealed when bolts are torqued down.
Oil feed is through hole in journal closest to cam sprocket, from there oil goes through cam to feed other journals.

yorkie_chris · 15-01-10, 12:41 PM

Or it can be sucking sound because you create vacuum as you remove bolts out of a blind hole.

15-01-10, 12:45 PM

definately out, as son as i cracked the bolt losse it happened.

15-01-10, 04:05 AM	#1
beabert Guest Posts: n/a	camshaft holder pressure When unscrewing the front cyclinder exhaust central cam holder bolts , there was a pressure release. Is this normal? Cant tell if there a channel for cooling/oil from the manual.

15-01-10, 05:03 AM	#2
Red Herring Member Mega Poster Join Date: Dec 2007 Posts: 2,708	Re: camshaft holder pressure Was it the last bolt you released? If so then it may have been the journal lifting off the cam and obviously they do have an oil feed, although I'd have been surprised if you still had any oil pressure given how long the engine must have been switched off by then.....

15-01-10, 05:45 AM	#3
beabert Guest Posts: n/a	Re: camshaft holder pressure Just the two middle bolts, a hiss sound, the thing wouldnt come off even with all bolts out, needed a rubber hammer. Last edited by beabert; 15-01-10 at 05:46 AM.

15-01-10, 06:29 AM	#4
zadar Guest Posts: n/a	Re: camshaft holder pressure Yes, it is normal.

15-01-10, 07:47 AM	#5
beabert Guest Posts: n/a	Re: camshaft holder pressure Oil pressure?

15-01-10, 09:53 AM	#6
zadar Guest Posts: n/a	Re: camshaft holder pressure Not really oil pressure, you don't have any with motor not running. It is heat pressure build up inside bolt holes which are sealed when bolts are torqued down. Oil feed is through hole in journal closest to cam sprocket, from there oil goes through cam to feed other journals.

15-01-10, 12:41 PM	#7
yorkie_chris Noisy Git Mega Poster Join Date: Apr 2007 Location: Halifax/Leeds Posts: 26,645	Re: camshaft holder pressure Or it can be sucking sound because you create vacuum as you remove bolts out of a blind hole. __________________ Currently Ex Biker Now rebuilding a 63' fishing trawler as a dive boat

15-01-10, 12:45 PM	#8
beabert Guest Posts: n/a	Re: camshaft holder pressure definately out, as son as i cracked the bolt losse it happened.

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