seized pistons streetbob 07
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Tourer
Joined: Dec 2008
Posts: 314
Likes: 13
From: Thailand
seized pistons streetbob 07
I just didn't know any better.
I took my short shots off back in March thinking I'd be putting on Thunder headers, well things didn't happen the way I'd planned.
While I was waiting for them I had a new paint job, some more parts powder coated, Hid light installed and bought basically a whole front end upgrade.The bike was indoors and I had put something in the exhaust ports to keep dust out.Well it must have got condensation inside because I got tired of waiting for the Thunder headers I put the short shots back on and tried to fire it up.I got a knocking noise.I felt it with my hand against the cylinder. So I put the bike back on the lift and put it in gear and tried to turn the rear wheel by hand .No luck. I pulled the plugs and sprayed a bunch of WD40 in side and let it sit I finally got the pistons freed/the back wheel to turn so now what do I do?
I want to pull the heads and have a look at the cylinder walls and clean all that gunk out of there.I have never done anything like this before, getting all the parts back on the bike by myself was ok but this is bit daunting.
What should I expect? How bad is it going to be?Any tips advice? And Yes I have a service manual.
I took my short shots off back in March thinking I'd be putting on Thunder headers, well things didn't happen the way I'd planned.
While I was waiting for them I had a new paint job, some more parts powder coated, Hid light installed and bought basically a whole front end upgrade.The bike was indoors and I had put something in the exhaust ports to keep dust out.Well it must have got condensation inside because I got tired of waiting for the Thunder headers I put the short shots back on and tried to fire it up.I got a knocking noise.I felt it with my hand against the cylinder. So I put the bike back on the lift and put it in gear and tried to turn the rear wheel by hand .No luck. I pulled the plugs and sprayed a bunch of WD40 in side and let it sit I finally got the pistons freed/the back wheel to turn so now what do I do?
I want to pull the heads and have a look at the cylinder walls and clean all that gunk out of there.I have never done anything like this before, getting all the parts back on the bike by myself was ok but this is bit daunting.
What should I expect? How bad is it going to be?Any tips advice? And Yes I have a service manual.
Last edited by fat bastard 68; Jul 22, 2013 at 06:12 AM. Reason: added pics of bike
Elite HDF Member
Joined: Oct 2009
Posts: 4,416
Likes: 88
From: San Quirino, Italy
I just didn't know any better.
I took my short shots off back in March thinking I'd be putting on Thunder headers, well things didn't happen the way I'd planned.
While I was waiting for them I had a new paint job, some more parts powder coated, Hid light installed and bought basically a whole front end upgrade.The bike was indoors and I had put something in the exhaust ports to keep dust out.Well it must have got condensation inside because I got tired of waiting for the Thunder headers I put the short shots back on and tried to fire it up.I got a knocking noise.I felt it with my hand against the cylinder. So I put the bike back on the lift and put it in gear and tried to turn the rear wheel by hand .No luck. I pulled the plugs and sprayed a bunch of WD40 in side and let it sit I finally got the pistons freed/the back wheel to turn so now what do I do?
I want to pull the heads and have a look at the cylinder walls and clean all that gunk out of there.I have never done anything like this before, getting all the parts back on the bike by myself was ok but this is bit daunting.
What should I expect? How bad is it going to be?Any tips advice? And Yes I have a service manual.
I took my short shots off back in March thinking I'd be putting on Thunder headers, well things didn't happen the way I'd planned.
While I was waiting for them I had a new paint job, some more parts powder coated, Hid light installed and bought basically a whole front end upgrade.The bike was indoors and I had put something in the exhaust ports to keep dust out.Well it must have got condensation inside because I got tired of waiting for the Thunder headers I put the short shots back on and tried to fire it up.I got a knocking noise.I felt it with my hand against the cylinder. So I put the bike back on the lift and put it in gear and tried to turn the rear wheel by hand .No luck. I pulled the plugs and sprayed a bunch of WD40 in side and let it sit I finally got the pistons freed/the back wheel to turn so now what do I do?
I want to pull the heads and have a look at the cylinder walls and clean all that gunk out of there.I have never done anything like this before, getting all the parts back on the bike by myself was ok but this is bit daunting.
What should I expect? How bad is it going to be?Any tips advice? And Yes I have a service manual.
Tourer
Joined: Dec 2009
Posts: 413
Likes: 3
Pour some Marvel Mystery oil in each plug hole and let it sit a few hours....Then crank her over with the plugs out to blow out the Marvel mystery oil residue........then put the plugs in and fire it up and see how she sounds. I have done this on a few car engines that were locked up with no problems......No oil burning etc afterwards.
Pour some Marvel Mystery oil in each plug hole and let it sit a few hours....Then crank her over with the plugs out to blow out the Marvel mystery oil residue........then put the plugs in and fire it up and see how she sounds. I have done this on a few car engines that were locked up with no problems......No oil burning etc afterwards.
+1 as stated some marvel oil down the plug and let it sit for a bit will free things up and you will be good to go. black and blue looks great!
once you have the oil in there for a day or so, wiht the plugs out you can rock the bike back and forth in 2nd gear to free things up.
once you have the oil in there for a day or so, wiht the plugs out you can rock the bike back and forth in 2nd gear to free things up.
Last edited by JRK5892; Jul 23, 2013 at 10:05 AM.
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Tourer
Joined: Dec 2008
Posts: 314
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From: Thailand
Thanks guys but a boroscope is outta my price range.
I pulled the rear rocker box cover today and so there is no going back!
I keep reading the manual and its a hell of a learning curve, right now I stopped cos I'm worried about taking off the rocker arm support plate without damaging anything so I'll read again and look on you tube as wel.
So far I know I need to get gaskets and o-rings a dog bone adapter and maybe a deglazer I'll have to wait and see the condition of the cylinders.
Not much of an update but I'll add more as I learn and of course I'll add pics too
I pulled the rear rocker box cover today and so there is no going back!
I keep reading the manual and its a hell of a learning curve, right now I stopped cos I'm worried about taking off the rocker arm support plate without damaging anything so I'll read again and look on you tube as wel.
So far I know I need to get gaskets and o-rings a dog bone adapter and maybe a deglazer I'll have to wait and see the condition of the cylinders.
Not much of an update but I'll add more as I learn and of course I'll add pics too
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Thread Starter
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Tourer
Joined: Dec 2008
Posts: 314
Likes: 13
From: Thailand
Subaru blue is what he called it, not bad for less than 200 dollars and there is a Ness fairing done too.
I just had have something other than denim black and they took a dent out of the side
Tourer
Joined: May 2012
Posts: 465
Likes: 2
From: Beaverton, OR
There are a lot of youtube vids on this. All twin cams are the same for tear down. Use the manual for torque specs and stuff but as far as tear down and build up its not all that hard. With the tank and stuff out of the way it should take maybe 3 - 4 hours of work to tear it down and inspect it. I would plan for 8 hours with it being your 1st tear down. May as well get some new rings at this point. May even want to install some new adjustable pushrods while in there. with the rocker boxes off you can pull them right out the top of the tubes. since you are not busting into the cam chest and just inspecting the jugs you should not have to worry too much about your tappets and all that jazz.
Simply pull the rocker arms and rocker box, then the heads, and then the jugs. Make sure you have some rags to block off the top of the block at the crank arms to keep **** from getting in the block case. Some tubing for the head studs is a good thing as well to keep the pistons from slapping them while u work on it. Dig in man no better way to learn
. Oh and when putting it all back together get some popsicle sticks to help get the rings in the jugs if you dont have a ring compressor. You just slowly work them around the rings while guiding the jug over the piston. Take a little time but works well.
Simply pull the rocker arms and rocker box, then the heads, and then the jugs. Make sure you have some rags to block off the top of the block at the crank arms to keep **** from getting in the block case. Some tubing for the head studs is a good thing as well to keep the pistons from slapping them while u work on it. Dig in man no better way to learn
. Oh and when putting it all back together get some popsicle sticks to help get the rings in the jugs if you dont have a ring compressor. You just slowly work them around the rings while guiding the jug over the piston. Take a little time but works well.
Last edited by socialoutcast; Jul 23, 2013 at 12:57 PM.