Top end tear down
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Former Sponsor
Joined: Feb 2005
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From: Atlanta
Top end tear down
I have to replace the lower cylinder gaskets on my 94 FXSTC because of an oil leak. It looks pretty straight forward, but figure I would check if anybody has any comments on anything I should be aware of that may not be obivious.
Thanks
Thanks
Seasoned HDF Member
Joined: Dec 2004
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From: Texas! Ya mean there's someplace else?
RE: Top end tear down
When you pull the rocker box assemblies off, remember the way you had to turn, tilt, and manuver the lower section of the rear one. That one screws with my poor ol' brain every time when I have to put it back together. And don't just replace the base gaskets, replace everything. Check your intake rubbers closely for age cracks that might be starting. Good time to go through the carb, too. And decarbonize the combustion chamber, but don't scratch the aluminum.
Be careful and follow the "destructions" for the pushrods on reassembly. Easy to get in a hurry and bend a valve stem or pushrod.
Be careful and follow the "destructions" for the pushrods on reassembly. Easy to get in a hurry and bend a valve stem or pushrod.
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Former Sponsor
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From: Atlanta
RE: Top end tear down
Pococj,
Thank you for the information. I picked up the screaming eagle upper end gasket kit from HD yesterday. Was told that this was an improvement over the stock gaskets. Have not started yet, but looks like the rear rocker box is going to be a real challange because of the frame, will heed your advice and remember how it comes off.
Thanks
Thank you for the information. I picked up the screaming eagle upper end gasket kit from HD yesterday. Was told that this was an improvement over the stock gaskets. Have not started yet, but looks like the rear rocker box is going to be a real challange because of the frame, will heed your advice and remember how it comes off.
Thanks
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Former Sponsor
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From: Atlanta
Top end tear down - update
Well, last weekend I finally got around to replacing the lower cylinder gaskets.
BTW the bike is pretty standard, with some basic mods, Andrews Cam, adj. pushrods, dyna 2000 ignition, White bros. pipes and dynojet .
As I mentioned I got the Screaming eagle upper end gasket kit, it had all the gaskets needed. The only additional things I had to get was a relpacement L-joint where the gas line goes int the carb. it was plastic and broke (new one was all brass) and a cylinder stud (one came out when removing the head bolts so I replaced it). It took me three days total, but I also cleaned everything, lubed all the cables, adj. the clutch, re-positioned my Internatrix Alarm, adjusted my pushrods, had to replace the stud and L-fitting and changed all the fluids and of course polish all the chrome while it was off the bike.
Let me tell you pococj was right, it took me for ever to get the middle rocker cover back on. The clearance was minimal to say the least, and had to keep moving the valves up and down to get it on. The only other thing that was a pain was the ring compressor I had, was not the greatest.
Aside from that, it wasn't bad. I think most riders with a decent set of tools could do it.
I would however suggest the special allen head wrench for the rocker covers that is flat so you can get in under the frame, it will save some time.
I checked with the local Harley dealers and got quotes of $1500 to $1700.00.
The cost for the parts was less than $100.00 and actual time was about 20 hrs. With
the correct tools that time would be considerably less.
Oh yes, and the most important part, so far no oil leak.
BTW the bike is pretty standard, with some basic mods, Andrews Cam, adj. pushrods, dyna 2000 ignition, White bros. pipes and dynojet .
As I mentioned I got the Screaming eagle upper end gasket kit, it had all the gaskets needed. The only additional things I had to get was a relpacement L-joint where the gas line goes int the carb. it was plastic and broke (new one was all brass) and a cylinder stud (one came out when removing the head bolts so I replaced it). It took me three days total, but I also cleaned everything, lubed all the cables, adj. the clutch, re-positioned my Internatrix Alarm, adjusted my pushrods, had to replace the stud and L-fitting and changed all the fluids and of course polish all the chrome while it was off the bike.
Let me tell you pococj was right, it took me for ever to get the middle rocker cover back on. The clearance was minimal to say the least, and had to keep moving the valves up and down to get it on. The only other thing that was a pain was the ring compressor I had, was not the greatest.
Aside from that, it wasn't bad. I think most riders with a decent set of tools could do it.
I would however suggest the special allen head wrench for the rocker covers that is flat so you can get in under the frame, it will save some time.
I checked with the local Harley dealers and got quotes of $1500 to $1700.00.
The cost for the parts was less than $100.00 and actual time was about 20 hrs. With
the correct tools that time would be considerably less.
Oh yes, and the most important part, so far no oil leak.
Road Master
Joined: Jul 2005
Posts: 1,061
Likes: 5
From: Fort Worth TX
RE: Top end tear down - update
THe new kit had metal base gaskets correct?? Did you increase the tq on the head bolts?? The gaskets are made by cometic and they require to be tqd to 41 ftlbs on the final verse's the 90* as in the book. I have seen sepage when this was not done, I wish I had seen this post before you did the work. I did one a few years ago and it leaked after calling cometic about ti they informed me that this was standard for the metal base gaskets. THey did however send me a new kit free of charge as I did the job over. One would think that they could keep there 2 stickers in the box and instead supply a important piece of info such as that on a small sheet of paper!!
Seasoned HDF Member
Joined: Dec 2004
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From: Texas! Ya mean there's someplace else?
RE: Top end tear down - update
HDWRENCH, after reading your post I have a question. My '87 Evo head bolts are torqued to 7-9 ft-lbs, then to 12-14 ft-lbs, then turned 1/4 turn more. There is no final torque figure given, though it comes out to about 40-45 ft-lbs, and is dependent on the threads being properly lubed.
Anyway, are the later Evos torqued differently, or did HD change the instructions sometime after I bought my service manual, or are your figures the result of your experience?
Anyway, are the later Evos torqued differently, or did HD change the instructions sometime after I bought my service manual, or are your figures the result of your experience?
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Former Sponsor
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From: Atlanta
RE: Top end tear down - update
In the Screamin Eagle Gasket Kit I installed 17046-98 rev 7-19-2004 the lower cylinder gaskets were not metal, the cylinder head gaskets were multi-layered steel. The brief instructions said " Install cylinder heads according to instructions given in appropriate service manual" My manual stated to torque to 7-9 ft-lbs, then to 12-14 ft-lbs, then turned 1/4 turn more. I used this procedure. I was out of town this past weekend so I only have a couple hundred miles on the new gaskets, but so far all is well. If a problem occures, I will post.
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