I have a problem with the engine I finished putting in last night on a 95 z28. When I tried to start it up last night it didn't go. Now I have been wrecking my brain trying to find out whether or not I installed the cam correctly.

To those who know and are more fimiliar.

Is is poosible that the cam be installed wrong?? I had the heads removed when I installed the cam. I rotated the crank until the #1 piston was at TDC. Then, I installed the cam gear and bolts. I aligned the marks as close as possible, crank at 12 and cam at 6. everything sounds good doesn't it???? Anyway, could it be possible that I just adjusted the valvetrain with # 6 at TDC when it should have been #1 at TDC?? Reaon is that when I installed the opti, the pin on the cam was around 3 or 4 o'clock. and that is when I adjusted the rockers as if #1 was at TDC. Also, the clockwise motion I used to turn the crank was facing the motor, not as if I were in the driver seat. WHich is the right clockwise.


Any help would be great----thanks.

 

I would check and see if all the connections are there on the intake manifold. You reconnected the fuel lines?

 

When the dots on the crank and cam gear are facing each other that is #6, when they are both at 12 o'clock that is the #1. Sounds like you ajusted the rockers in the #1 TDC sequence when the motor was in the #6 TDC. I would Back off all the rockers and turn the crank over till the #6 ehaust rocker starts to go down and then come back up 1/4". Then reajust them.

 

I did connect the fuel line and checked for pressure and put the noid light on the injectors to see if they were getting the spark. I also checked the coil to see if it had spark and it did.

I think Smoke TA is right, I do think I adjusted the valves incorrectly. I will check that out and see.

Any more help or comments ---keep them coming---and thanks for the replies, a little here and a little there will render the solution!

However, do you think I installed the cam correctly, I'de hate to have to mess with it again. New gaskets and all aren't cheap.

 

easy way to check TDC (had to do this when i installed springs) is to take of the #1 plug and have a friend turn the crank when you stand over the car with your finger over the hole. when you feel air push out of the hole...that is TDC #1.

what do you mean by it didnt go? did it crank...do nothing...ext.

 

It was cranking fine but I could hear a vacuum sound around the valvetrain. Yea, your techinque works and also putting a small screwdriver in the plug hole too. I was just too tired at night and wanted to finish up---there you go---never rush something like this---Right??


--Thanks for the comments---keep them coming.

 

TTT

 

When you installed the cam with the dots together, you are at #6 TDC not #1. If you used that for your reference to begin valve adjustment, you are going to be all wrong.
The dowel pin is at 9 o'clock when at #1 and 3 o'clock when at #6.

 

Shoebox,

You just helped me back up my own thought. I read this on the chilton manual, that #1 piston is at TDC when the dowel on cam is at 9 o'clock. I did adjust the rockers wrong!!! I now believe this is the straw that---well---you know.

Thanks a mill

 

Hence the marking on back of the opti marked 6 and 1 that shows the TDC locations. When you install the opti on the dowl pin is pointed to the 6 on the opti when the cam and crank is dot to dot.

That's why shoebox is around here, he know his stuff.

 

Thanks for all the comments and help. You guys make this website busy with info. Now I know for sure what I have to do to get that car fired up.

THANKS A LOT FOR ALL THE HELP.----LATERZ

 

I can actually read and comprehend at times.

This is what Ken is referring to. Remember that when you are looking at the back of the opti, the references are a mirror image of the front of the cam.

 

I dont know much, but this same thing happened to me last week when I started mine back up after putting it back together. Try putting the pedal to the floor and let it crank about 5 or 6 times, if it starts and runs fine connect the vacuum line to the fuel pressure regulator. Its the connector on the left side (looking at the car from front) on the left side of the intake, the one on the bottom, the hose connects to the FPR. Mine started with the gas pedal pushed, but when it was running there was a vacuum noise which I thought was headers but after I connected it to the FPR it went away. If the hose is already connected then read the above posts.

 

don't be so modest---shoebox.

 

If you install the cam mark at 6 with the crank mark at 12 and #1 is at TDC. Arrrghhhh $hit fudge packing i am going to have to tear it down again to make sure its right, I assumed that you lined up the dots 6 to 12 and since the cam only goes on 1 way your done. WTF. that p's me off. So what you guys have said is that the dowel pin should be at 9:00 when #1 is at TDC, It sounds like i have my cam 180 degrees off. Damnit man