A little Repair!

[(RIP) Arkwright]

Came home from bike nite last week on the G/S with a rattly engine! Investigation next day revealed the rear lower head/barrel stud on the offside to be loose..............having pulled itself out of the engine case. 3 of the other studs were not screwed in far enough either and 2 were screwed in too far only just missing the crank. As the techno-phobes will know this stud fortunately goes into a blind hole so a helicoil repair was possible without an engine strip. I also took the opportunity to put the rocker shafts back the right way. All is now well again, an relative quiet is restored! God bless PO's! (sometimes)

cheers,

 

[GEOFFREY DEACON]

If that stud also acts like an oil feed channel to the head?, then the Heli-coil needs to be of a special type to allow oil flow..?
Let me know ?.

 

[(RIP) Arkwright]

If that stud also acts like an oil feed channel to the head?, then the Heli-coil needs to be of a special type to allow oil flow..?
Let me know ?.

Only the top studs provide an oil feed to the rockers, they've got 'O' rings seals at the base of barrels.

cheers,

 

[Beemerboff]

The top ones with the oil feed are the usual ones that go, some even pulled during factory assembly so had a helicoil from new.

Pull them and you need a big solid timesert.

If you get a jig kit for either the helicoil or the timesert there is some provision in the jig for getting a oil feed hole.

Caution is the word when torquing bolts and studs. The convention is that all torque values are given for clean, dry threads , unless stated otherwise.
Well oiled threads need around 30% less torque than dry ones.

So take it easy when retorquing heads - stripped studs are every day, you dont hear of too many folks with a blown head gasket because the heads are slack.
In my experience 20 ft/lbs on oiled studs will hold the head on so no sense in using any more.

 

[Greg Masters]

I hope that Bryn is following this thread!



Greg

 

[(RIP) Arkwright]

Caution is the word when torquing bolts and studs. The convention is that all torque values are given for clean, dry threads , unless stated otherwise.
Well oiled threads need around 30% less torque than dry ones.

So take it easy when retorquing heads - stripped studs are every day, you dont hear of too many folks with a blown head gasket because the heads are slack.
In my experience 20 ft/lbs on oiled studs will hold the head on so no sense in using any more.

I'm with you on this one, I redid my heads to 25ft/lbs which is plenty!

cheers,

 

[Steptoe]

.

If you get a jig kit for either the helicoil or the timesert there is some provision in the jig for getting a oil feed hole.

.

No need for a jig - insert a timesert and drill where the oil feed hole is. 5 minute job.