I am doing the secret cam swap in my motor (motor is out of the car) and I had it all set in the timed position and everything. Then dumbass me took off the transmission and accidentally spun the flywheel, so the crank turned. I have no idea how many times it went around. I didn't realize it until it was too late. Do I just turn the crank until the key is pointing at twelve'o'clock? Does it matter how many times it went around?? Now I'm worried....
2010 Subaru Impreza WRX Limited
1999 Cavalier Z24 Supercharged
1999 Grand AM SE (Beater Car)
1997 GMC Sierra
2007 Honda CBR 600RR
2005 Honda TRX450R
Anyone??
2010 Subaru Impreza WRX Limited
1999 Cavalier Z24 Supercharged
1999 Grand AM SE (Beater Car)
1997 GMC Sierra
2007 Honda CBR 600RR
2005 Honda TRX450R
No it doesnt matter how many times it went around. Its fine.. Turn the the crank COUNTER clockwise I believe to take it back to Top Dead Center. I just installed my secret cams(engine is out of the car) and I went step by step from all 3 of my service manuals lol..
If I am incorrect about the COUNTER clockwise part, someone please correct me. But I believe im 99% sure thats the way to go.
~2014 New Z under the knife, same heart different body~
______________________
WHITECAVY no more
2012 numbers - 4SPD AUTOMATIC!!
328 HP
306 TQ
BTW, once you get it to TDC, turn the crank a couple degrees past it(clockwise) to avoid the dreadED valve slap during initial startup.. Mine is turned a hair or two past TDC.
~2014 New Z under the knife, same heart different body~
______________________
WHITECAVY no more
2012 numbers - 4SPD AUTOMATIC!!
328 HP
306 TQ
Does it matter that when I accidentally turned the flywheel, that the crank turned clockwise? What is valve slap? And do I turn it a few degrees clockwise before or after I install the timing chain??
2010 Subaru Impreza WRX Limited
1999 Cavalier Z24 Supercharged
1999 Grand AM SE (Beater Car)
1997 GMC Sierra
2007 Honda CBR 600RR
2005 Honda TRX450R
Its when the valves slap the top of the pistons. That causes bent valves.
When you install the timing chain, you should already be at TDC.
I wish I had my manuals in front of me so I could tell ya step by step.. Im taking it you don't have the chilton or haynes with you?
~2014 New Z under the knife, same heart different body~
______________________
WHITECAVY no more
2012 numbers - 4SPD AUTOMATIC!!
328 HP
306 TQ
Ok did this happen while the timing chain was still on, or off? Were the cams in or out? If you spun the crank while the timing chain was still in then it should not matter where ti stopped. If it was timed and the tensioner is in you are good. If it was in the timed position with the cams out you should still be fine as well. Put the crank in the TDC spot. You do want to put it in the 12:15 poistion while installign the cams so no valves hit (they should not anyways), once the cams are in rotate the crank counter clockwise until you get back to TDC set your timing and go.
FU Tuning
Yeah, it happened with the timing chain off and the cams out. I just rotated it back to 12:00. I have to put the cams in tomorrow. So all I do is get the cams in, stick a dowel through both cam sprockets and into the holes behind, and throw on the chain?
2010 Subaru Impreza WRX Limited
1999 Cavalier Z24 Supercharged
1999 Grand AM SE (Beater Car)
1997 GMC Sierra
2007 Honda CBR 600RR
2005 Honda TRX450R
Oh yeah, just out of curiosity, why do you have to roatate the crank counter-clockwise?
2010 Subaru Impreza WRX Limited
1999 Cavalier Z24 Supercharged
1999 Grand AM SE (Beater Car)
1997 GMC Sierra
2007 Honda CBR 600RR
2005 Honda TRX450R
You dont. As long as you set it back to TDC one way or the other.
If the cams are still out.... no worries.
If the cams were in.... and you turned the crank.... that's bad. Potentially bending-valves, aka very very bad.
I think you're a lucky man
If you were just turning the flywheel with a screwdriver or something to get the flywheel bolts out, you would have been fine, you would have been able to tell when the pistons hit the valves, i dont think a screwdriver on a flywheel would have enough force to bend them? But anyway, like Lenko said, if the cams are out, then all the valves are being sucked into the head by the springs anyway
when you guys say counter clock wise you need to specify if your turning the crank/timing side or the flywheel side because he said he was turning the flywheel which would be counter clockwise but if you were timing it you would rotate clockwise on the side where the timing chain is
and as for how many times it went around yes it does matter if your at #1 piston tdc one full turn will take it out of tdc and put the #2 piston at tdc one more full turn will take the #1 back to tdc, 2 full rotations will bring you back to the same position where as only one rotation will bring you 180 degrees from where you started
Uh, what?
TDC is Top Dead Centre.... it happens once each time you rotate the crank. It'll happen at the top of the compression stroke and again at the top of the exhaust stroke.
The cam position sensor is how the computer tells which is which.
John Lenko wrote:Uh, what?
TDC is Top Dead Centre.... it happens once each time you rotate the crank. It'll happen at the top of the compression stroke and again at the top of the exhaust stroke.
The cam position sensor is how the computer tells which is which.
Correct!!
Also I hope no one is trying to time a motor on the flywheel side.
FU Tuning
LOL, no I'm not timing it from the flywheel side :-) But thaanks for all the relies. I think I should have it timed correctly. I will try and turn the crank by hand before I put everything back together.
2010 Subaru Impreza WRX Limited
1999 Cavalier Z24 Supercharged
1999 Grand AM SE (Beater Car)
1997 GMC Sierra
2007 Honda CBR 600RR
2005 Honda TRX450R
