[Hoiho]

Well done - that’s gotta be a good feeling, almost worth breaking the bolts for 

Had you used the same torque wrench the previous two times? I wonder if the bolts were getting fatigued and third time was the clincher
 

[clachcik]

Well done - that’s gotta be a good feeling, almost worth breaking the bolts for 

Had you used the same torque wrench the previous two times? I wonder if the bolts were getting fatigued and third time was the clincher

Thanks. I was hoping it wasn't worse than just broken bolts. I just used the torque wrench this last time and I will not be doing that again. Now I need to find the right size tap for these new bolts and I am all set. No shavings or any metal pieces in the head thankfully.

[clachcik]

Really great work! Well done.  If you're worried about the ragged edges of the holes, you could knock it smooth with some wet and dry, use kerosene not water to lubricate the paper. But it most likely be fine without bothering.

Take it easy on the new bolts, huh?

Thanks I will try that. Oh I will, I want to tap these holes first and then just lightly bolt these in this time. With the engine on the frame it kind of gets in the way so I hope I can tap it straight on.

[Starpeve]

Thanks I will try that. Oh I will, I want to tap these holes first and then just lightly bolt these in this time. With the engine on the frame it kind of gets in the way so I hope I can tap it straight on.

If the bolts were softer than the head, which appears to be the case, save yourself the grief and don’t worry about running a tap through the threads. More likely to cause problems than fix them, I’d reckon.

[Karl Fenn]

Good job well done got them all out that's the main thing.

[gizzo]

If the bolts were softer than the head, which appears to be the case, save yourself the grief and don’t worry about running a tap through the threads. More likely to cause problems than fix them, I’d reckon.

Agree. If the threads work i'd leave them alone.

[justonemore]

If I was in your position just now I'd change my oil.

[clachcik]

Anybody know the size of the rocker cover bolts?

[lucky phil]

If the bolts were softer than the head, which appears to be the case, save yourself the grief and don’t worry about running a tap through the threads. More likely to cause problems than fix them, I’d reckon.

Personally I'd run an intermediate tap through all the holes with the broken bolts. From the images I can see you have damaged the first 2 or 3 threads in the heads extracting the bolt remains. Run the inter tap in 4 or five turns then follow up the same with a plug or finishing tap. Be careful starting the tap, use a small "t" bar wrench with a chuck style drive for better control. The cover screws are harder than the rocker and cam support material.

Ciao

[MartinThailand]

... Manual also says the bolts are one time use ...

Where does it say that in the manual? Page number?

Not disputing what you say at all, I'd just like to see it for myself. I don't find the online manual very easy to view so it's easy to miss small but important details like this.

[clachcik]

Where does it say that in the manual? Page number?

Not disputing what you say at all, I'd just like to see it for myself. I don't find the online manual very easy to view so it's easy to miss small but important details like this.

Page 19 but just noticed it doesn't say "cover" just cylinder head bolts. Makes sense. The bolts are soo soft but I got it all together and no issues!

[zimmemr]

Page 19 but just noticed it doesn't say "cover" just cylinder head bolts. Makes sense. The bolts are soo soft but I got it all together and no issues!

Quite a few OEM's on a wide range of engines recommend replacing the cylinder head bolts any time they're removed. Valve cover bolts not so much.

[phunky1]

I did the same thing being a new mechanic, even using a torque wrench.  I took off both rocker covers and had a local shop timecert each hole.  cost me $50 per hole, but wont have that problem anymore.  I have done another valve service since then and the new holes are solid.  You live you learn.   

[lucky phil]

I did the same thing being a new mechanic, even using a torque wrench.  I took off both rocker covers and had a local shop timecert each hole.  cost me $50 per hole, but wont have that problem anymore.  I have done another valve service since then and the new holes are solid.  You live you learn.   

Timeserts are very good, better than Helicoils. So good in fact that some equipment/machinery actually come with them from new.

Ciao

[phunky1]

I did the same thing being a new mechanic, even using a torque wrench.  I took off both rocker covers and had a local shop timecert each hole.  cost me $50 per hole, but wont have that problem anymore.  I have done another valve service since then and the new holes are solid.  You live you learn.   

It was $25 each to have the work done, not $50 like I said earlier....

Timeserts are very good, better than Helicoils. So good in fact that some equipment/machinery actually come with them from new.

Right, shouldn't have another issue...hopefully.