HMF/MOTOZ
04-24-2007, 09:26 AM
Hey 4 hund owners:
I just installed a big bore kit and hotcams stage 3 cam.
I also used: new cam tensioner, CRF450 timing chain, Kibblewhite valves, springs, new keepers, rockers, shafts, guides and seals.
Upon start up it "ticked" like a slant 6 Dodge 3 quarts low on oil.
I went through the required break in RPM and time like hotcams required...biting my lip and holding my ears the whole time.
Yes, I had top end oiling.
After reading many posts on here about the "tick" I just could not believe it should tick THAT loud.
I am versed on valve lash adjustment and engine building since 1974 so I think I have a handle on these things.
I used a Motion Pro angled valve lash gauge and set to hotcams specs.
Here is what I later found.
I removed the valve cover to check out things and everything seemed perfect plenty of oil, no shavings no wear marks.
Initially, I assembled the engine and installed the top motor/valve cover mount bolt, now my frame is slightly tweaked and this top bolt did not allign well with the frame holes then I did the valve lash.
THIS TIME I assembled the valve cover WITHOUT the top motor mount and set the valve lash EXACTLY the same as before.
I started it up and it purr'd like a kitten............NO TICK !!!
I then installed the top motor mount bolt/spacers.
POSSIBLY the top motor mount bolt was putting a lateral stress on the valve cover because of the tweaked frame and did not allow for the valves to be adjusted properly.
All I know is my 4 hund purrs like a well oiled machine now.........that "tic" from before was wrong and I was embarrased to even start it up.
Hope this helps
John@hmfengineering.com
I just installed a big bore kit and hotcams stage 3 cam.
I also used: new cam tensioner, CRF450 timing chain, Kibblewhite valves, springs, new keepers, rockers, shafts, guides and seals.
Upon start up it "ticked" like a slant 6 Dodge 3 quarts low on oil.
I went through the required break in RPM and time like hotcams required...biting my lip and holding my ears the whole time.
Yes, I had top end oiling.
After reading many posts on here about the "tick" I just could not believe it should tick THAT loud.
I am versed on valve lash adjustment and engine building since 1974 so I think I have a handle on these things.
I used a Motion Pro angled valve lash gauge and set to hotcams specs.
Here is what I later found.
I removed the valve cover to check out things and everything seemed perfect plenty of oil, no shavings no wear marks.
Initially, I assembled the engine and installed the top motor/valve cover mount bolt, now my frame is slightly tweaked and this top bolt did not allign well with the frame holes then I did the valve lash.
THIS TIME I assembled the valve cover WITHOUT the top motor mount and set the valve lash EXACTLY the same as before.
I started it up and it purr'd like a kitten............NO TICK !!!
I then installed the top motor mount bolt/spacers.
POSSIBLY the top motor mount bolt was putting a lateral stress on the valve cover because of the tweaked frame and did not allow for the valves to be adjusted properly.
All I know is my 4 hund purrs like a well oiled machine now.........that "tic" from before was wrong and I was embarrased to even start it up.
Hope this helps
John@hmfengineering.com