Help - Oil Leak. - SV650.org

21-06-07, 05:56 PM

Hey doods, got a bit of an oil leak problem. Basically I took the Cylinder covers off the other day to check my valce clearances, when I put the covers back on, one of the bolts on the rear decided to unthread the cylinder thread. Im left with **** all in there. At the time I put some lock tite on the bolt and tightened it as best I could (it reaches a point where it just turns and turns). But i've noticed now that its leaking oil, basically all over the rear of the bike today ... think it mixed with rain water which didnt help =(

My question is, what can I do about this? My first thought was to rethread the bolt hole on the cylinder and replace the bolt with a slightly larger one after re-threading? But is there anyother method I coul use?

Any help would be appreciated.

Thanks

Ant.

SVGrandad · 21-06-07, 06:07 PM

A decent engineering machine shop should be able to fit a helicoil insert for you. It is basically a coil spring with the internal coils the size of the original stud. The original hole is drilled and tapped to suit the outside coils of the spring.

It is surprisingly effective.

21-06-07, 06:19 PM

Is it an expensive procedure?

SVGrandad · 21-06-07, 06:23 PM

Not too bad if they can get at it to re drill the hole and tap it. If the bit has to be removed from the bike it can get expensive.

The beauty of the repair is that it is virtually indistinguishable from the original, and the original bolt, stud etc can still be used.

21-06-07, 06:25 PM

Yeah I think it could be expensive then. To get to the hole to properly drill an tap it theyd have to remove part of the casing and cams and what not to remove the top part of the cylinder :S **** .

yorkie_chris · 21-06-07, 06:36 PM

So take the head off and take it to them, if you've done the clearances its not much more work.

21-06-07, 07:29 PM

aye good idea

Sid Squid · 21-06-07, 08:02 PM

As I remember the cover bolts are threaded into the cam caps, thus you'll only need to remove them to Helicoil - same as if you were going to remove the cams to re-shim.

yorkie_chris · 21-06-07, 08:03 PM

Haynes reckon you should use a new head gasket on reassembly, doing it this way should only be an hour or less in time to do the job.
Otherwise
http://www.ar-sheldon.com/acatalog/A...t_20tkm6x1_2e0
or similar and helicoil it yourself.

yorkie_chris · 21-06-07, 08:05 PM

The 2 bigger bolts on the same side as the camchain are in the bearing shells, the smaller one on the other side is right into the head casting.

Edit: but if it was the smaller one then you could just drill right through (wash the swarf out first) and put a nyloc nut underneath, try BAPP for the longer bolt, Bodge-tastic

21-06-07, 05:56 PM	#1
sprocket Guest Posts: n/a	Help - Oil Leak. Hey doods, got a bit of an oil leak problem. Basically I took the Cylinder covers off the other day to check my valce clearances, when I put the covers back on, one of the bolts on the rear decided to unthread the cylinder thread. Im left with **** all in there. At the time I put some lock tite on the bolt and tightened it as best I could (it reaches a point where it just turns and turns). But i've noticed now that its leaking oil, basically all over the rear of the bike today ... think it mixed with rain water which didnt help =( My question is, what can I do about this? My first thought was to rethread the bolt hole on the cylinder and replace the bolt with a slightly larger one after re-threading? But is there anyother method I coul use? Any help would be appreciated. Thanks Ant.

21-06-07, 06:07 PM	#2
SVGrandad Member Join Date: Apr 2006 Location: Rugby Posts: 98	Re: HELP! Oil Leak A decent engineering machine shop should be able to fit a helicoil insert for you. It is basically a coil spring with the internal coils the size of the original stud. The original hole is drilled and tapped to suit the outside coils of the spring. It is surprisingly effective. __________________ SV1000S K4, Hugger, Scottoiler. Lowers Last edited by SVGrandad; 21-06-07 at 06:12 PM. Reason: poor tryping

21-06-07, 06:19 PM	#3
sprocket Guest Posts: n/a	Re: HELP! Oil Leak Is it an expensive procedure?

21-06-07, 06:23 PM	#4
SVGrandad Member Join Date: Apr 2006 Location: Rugby Posts: 98	Re: HELP! Oil Leak Not too bad if they can get at it to re drill the hole and tap it. If the bit has to be removed from the bike it can get expensive. The beauty of the repair is that it is virtually indistinguishable from the original, and the original bolt, stud etc can still be used. __________________ SV1000S K4, Hugger, Scottoiler. Lowers

21-06-07, 06:25 PM	#5
sprocket Guest Posts: n/a	Re: HELP! Oil Leak Yeah I think it could be expensive then. To get to the hole to properly drill an tap it theyd have to remove part of the casing and cams and what not to remove the top part of the cylinder :S **** .

21-06-07, 06:36 PM	#6
yorkie_chris Noisy Git Mega Poster Join Date: Apr 2007 Location: Halifax/Leeds Posts: 26,645	Re: HELP! Oil Leak So take the head off and take it to them, if you've done the clearances its not much more work.

21-06-07, 07:29 PM	#7
sprocket Guest Posts: n/a	Re: HELP! Oil Leak aye good idea

21-06-07, 08:02 PM	#8
Sid Squid No, I don't lend tools. Mega Poster Join Date: Jul 2003 Location: Skunk Works, Nth London Posts: 8,680	Re: Help - Oil Leak. As I remember the cover bolts are threaded into the cam caps, thus you'll only need to remove them to Helicoil - same as if you were going to remove the cams to re-shim. __________________ If an SV650 has a flat tyre in the forest and no-one is there to blow it up, how long will it be 'til someone posts that the reg/rec is duff and the world will end unless a CBR unit is fitted? A little bit of knowledge = a dangerous thing. "a deathless anthem of nuclear-strength romantic angst" Last edited by Sid Squid; 21-06-07 at 08:03 PM. Reason: Spelling!

21-06-07, 08:03 PM	#9
yorkie_chris Noisy Git Mega Poster Join Date: Apr 2007 Location: Halifax/Leeds Posts: 26,645	Re: HELP! Oil Leak Haynes reckon you should use a new head gasket on reassembly, doing it this way should only be an hour or less in time to do the job. Otherwise http://www.ar-sheldon.com/acatalog/A...t_20tkm6x1_2e0 or similar and helicoil it yourself.

21-06-07, 08:05 PM	#10
yorkie_chris Noisy Git Mega Poster Join Date: Apr 2007 Location: Halifax/Leeds Posts: 26,645	Re: Help - Oil Leak. The 2 bigger bolts on the same side as the camchain are in the bearing shells, the smaller one on the other side is right into the head casting. Edit: but if it was the smaller one then you could just drill right through (wash the swarf out first) and put a nyloc nut underneath, try BAPP for the longer bolt, Bodge-tastic Last edited by yorkie_chris; 21-06-07 at 11:29 PM.

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