Maintenance & Technical > KX500 Original
MONUMENT TO THE 2-STROKE, PART 2 - FINAL ASSEMBLY
Motorrad:
--- Quote from: weymouth399 on June 28, 2011, 02:36:43 PM ---Pull the head back off, pull the studs back out. Now when installing the studs use a quality thread sealant. (On the side that goes into cyl)
Put the head back on and I bet your problem goes away.
Bob W
--- End quote ---
That wont help you... No thread sealant needed.
Will only mask the problem..
The K5 has Blind Holes...
Will answer better when not on my phone...
delphipro5:
This head was gone over by "larry the compression release guy" himself and was in great shape before I sent it to him... The cylinder went to millennium coatings to be replated.... And then the whole thing was rebuilt by a reputable :roll:.... engine builder in my area... new oem gasket... I really think it's just the top engine mount.. I will loosen it and retighten the head nuts to correct tourqe and then retighten the top engine mount.... I really hope that solves the problem... It would blow to have to pull the engine apart again right now... 3 of the 4 that are leaking are the ones directly around that engine mount. :|
Polar-Bus:
First off, I personally would be concerned. AF should NOT be leaking past the head studs. This "usually" is a tell tale sign of a warped head. If the AF is leaking outside the head, it could be potentially leaking into the cylinder, and down into your crankcase as well. Did this engine run good before the major overhaul ?
When I did my complete top end back in 2008, my engine was in great shape, really didn't even need a top end in hindsight, but after a good cleaning and all fresh OEM gaskets and parts, my engine went together perfect, and still runs perfect today.
Friar-Tuck:
Good Morning Delphi,
Something the guys who have built engines with bigger H.P. numbers all recommend was to lap the head and the cyl.
and chamfer (or counter sink) the cyl. head studs.
As you torque down the head, the studs tend to pull a small ridge up from around the stud itself where it exits the cyl.
And I have had to learn the hard way :| over-torquing the bolts will cause the head to leak.
I'm sure its something simple.
Tuck\o/
Polar-Bus:
--- Quote from: Friar-Tuck on June 29, 2011, 03:54:33 AM ---Good Morning Delphi,
Something the guys who have built engines with bigger H.P. numbers all recommend was to lap the head and the cyl.
and chamfer (or counter sink) the cyl. head studs.
As you torque down the head, the studs tend to pull a small ridge up from around the stud itself where it exits the cyl.
And I have had to learn the hard way :| over-torquing the bolts will cause the head to leak.
I'm sure its something simple.
Tuck\o/
--- End quote ---
If this were true, I would think the af would then tend to leak from between the head gasket ? But hey, a simple lesser head "re-torque" wont cost a dime ! I'd be very curious if this is the issue...
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