So, I just got my heads back from the machine shop and got it all assembled today. It runs but horribly, it looks/sounds like the valve timing is off, so I
pulled it back apart to check. it is perfect. after a couple hours of head scratching and staring at it I decided to pull the number one plug and tdc the motor with the old coat hanger feeling when the piston stops traveling north. the piston stops coming up and I check the crank pulley notch... it shows 10 btdc! are these really that far off??? so tomorrow I guess I'll reset the cam timing to my findings, It just seems very weird not to mention frustrating. anyone else seen this? or am I just totally missing something?
Jason
pulled it back apart to check. it is perfect. after a couple hours of head scratching and staring at it I decided to pull the number one plug and tdc the motor with the old coat hanger feeling when the piston stops traveling north. the piston stops coming up and I check the crank pulley notch... it shows 10 btdc! are these really that far off??? so tomorrow I guess I'll reset the cam timing to my findings, It just seems very weird not to mention frustrating. anyone else seen this? or am I just totally missing something?
Jason
Registered User
Both No. 1 valves should be loose at TDC. (think I remember this correctly)
And so should the No. 3 valves . Think we time the thing to 5 degrees on the crankshaft pulley.
And so should the No. 3 valves . Think we time the thing to 5 degrees on the crankshaft pulley.
Registered User
If it were off a tooth, that would be alot more than 10deg.
what was done to the heads at the machine shop?
Did you check the valve clearances?
what was done to the heads at the machine shop?
Did you check the valve clearances?
well, I got it solved today.. turns out the cam timing was right on..guess sometimes you just have to walk away.. took about 5 minutes to double check and decide I jumped to conclusions yesterday. today I started it, heard a vacuum leak, pulled the plentum, fixed it and had it running perfectly in an hour. I guess after working all day my brain shut down.. thanks for the help anyways guys. btw.. I had new valves and seats installed and the lash set at the machine shop, it had a burnt valve.
Registered User
Quote:
Often that is good advice when you come to a stumbling blockOriginally Posted by Brasson
....guess sometimes you just have to walk away...
glad to hear it's fixed