[coffey_5.0]

I just put on some GT40P heads, with new springs, rollers and lifters. I went to start it up and it wont. i rechecked all the connectors and lines, but still nothing. i dont know what to do. is there anything that i am missing or can anyone think of anything that might help....also does anyone have the belt diagram available?

[1slo5.0]

Originally Posted by coffey_5.0 I just put on some GT40P heads, with new springs, rollers and lifters. I went to start it up and it wont. i rechecked all the connectors and lines, but still nothing. i dont know what to do. is there anything that i am missing or can anyone think of anything that might help....also does anyone have the belt diagram available?

Do you still have factory rocker arms or did you switch to roller rockers? If you switched to roller rockers are they pedestal mount or stud mount and did you have the proper machine work done and adjust them properly? Do you have fuel pressure? Do you have spark? Do you have compression? Is the timing correct?

[Rustbelt]

is the batt. charged?

[78mach1]

Originally Posted by Darrell Do you still have factory rocker arms or did you switch to roller rockers? If you switched to roller rockers are they pedestal mount or stud mount and did you have the proper machine work done and adjust them properly? Do you have fuel pressure? Do you have spark? Do you have compression? Is the timing correct?

wow that was like every possibility in one long run on sentence!

if he used after market pedestal rockers and didnt shim them they might be keeping the valves open

[coffey_5.0]

no i installed a set of roller rockers, they are pedastal mount, i had the springs installed to specs. yeah i have fuel, but it seems like it is flooding itself. have spark and compression, and havent been able to check the timing correctly yet. still no belt diagram?

[1slo5.0]

Originally Posted by coffey_5.0 no i installed a set of roller rockers, they are pedastal mount, i had the springs installed to specs. yeah i have fuel, but it seems like it is flooding itself. have spark and compression, and havent been able to check the timing correctly yet. still no belt diagram?

You might need to shim the rockers like 78mach1 said.

[tdf]

It's been mentioned. But, how much compression do you have? If the valves are not adjusted (shimmed or ??) the compression would suffer, right? If it seems to be flooding then fuel must be building up in the cylinders. Maybe there isn't enough compression to get good combustion. Do you have at least 140 psi?

[Speedstang302]

how you even going to geuss the problems..could be dead battery, could be bad starter selanoid, could be plug wires in wrong spot...as easy as those...


does it turn over or dead on start...does it backfire when trying to start?

[Rustbelt]

what kind of roller rockers? did you put the distributer in correctly?

[ryans88gt]

Well you could have the distributor 180 out. The belt only goes on one way, if it is on, then it is on correctly. Double check your firing order with the plug wires.
Any more information about what the engine is doing would help. Like does it backfire, ping, pop, just no firing, is it cranking over fast, etc...


Did you check the lash when you bolted down the rockers? Several people have mentioned this above and I am not sure if you understand. Should be about 1/4 to 1/2 turn past zero lash. If you had to tighten more than 1/4 to 1/2 turn you need shims under the pedestals or you will be hanging the valves open and it will never start.

[coffey_5.0]

Well lets start with what its doing exactly. I went to start it up, battery fine, turned over about 5 times but didn’t start. checked all wiring, fuses, lines everything was fine. tried again nothing. I have checked the distributor but with the ignition module attached can it be 180 out? I put it in the same position it was in when I took it out. I tried to check compression today but I believe I was unsuccessful at it, or I have absolutely none at all. yeah I figured that was the deal with the belt, but was double checking. I checked the firing order and spark several times. I guess what it does sound like is low compression. this was my first install on a set of roller rockers, which were I believe PROFORM 1.6 rollers. I read that I was suppose to torque the rockers to 18 ft-lbs so that’s what I did. should I take off the covers, loosen them until they are just tight the tighten them a quarter turn or something? or is it suppose to be 18 ft-lbs but just add shims?

[1slo5.0]

Yes the distributor can be 180 out. Was the rotor facing the same direction as it was when you pulled the distributor or is just the distributor itself facing the same direction?

[ryans88gt]

Originally Posted by coffey_5.0 Well lets start with what its doing exactly. I went to start it up, battery fine, turned over about 5 times but didn’t start. checked all wiring, fuses, lines everything was fine. tried again nothing. I have checked the distributor but with the ignition module attached can it be 180 out? I put it in the same position it was in when I took it out. I tried to check compression today but I believe I was unsuccessful at it, or I have absolutely none at all. yeah I figured that was the deal with the belt, but was double checking. I checked the firing order and spark several times. I guess what it does sound like is low compression. this was my first install on a set of roller rockers, which were I believe PROFORM 1.6 rollers. I read that I was suppose to torque the rockers to 18 ft-lbs so that’s what I did. should I take off the covers, loosen them until they are just tight the tighten them a quarter turn or something? or is it suppose to be 18 ft-lbs but just add shims?

+1 on what Darrell said (I've done this myself a few times when changing the cap and rotor). However, if you just torqued down the rockers, that is your problem. You need to shim them so that it only takes 1/2 turn to reach 18 ftlbs. What I mean by 1/2 turn, is you have to adjust a single rocker at a time. Adjust the intake rocker when the exhaust rocker is just starting to open the valve. Adjust the exhaust rocker when the intake rocker has almost closed the valve. You will have to turn the motor over while you are watching the rockers (this is easiest with a big breaker bar and the spark plugs removed so you aren't fighting compression or have a friend bump the starter while you watch the rockers). Then you torque the rocker down, while spinning the pushrod with the other hand. As soon as there is resistance to the pushrod spinning freely it should only take 1/4 to 1/2 turn from that point to reach 18 ftlbs. If it takes more you need a shim under there and try again. Most likely all of them will need shims. This is a tedious process that takes some time so don't get in a hurry and it is OK to double check your work.

Good luck!

[lugnutz08]

did you mark the distributor twice when removing it?you should have marked where the rotor was installed and then when it spun when removed.then when you reinstalled just reversed the process.

[ujslost]

get the number 1 cylinder to TDC on the compression stroke and retime the dist. number 1 on the dist should be pointing directly @ 12 oclock towards the firewall. Make sure your rotor button points that way. then put the cap on, and have someone turn the engine over and slowly turn the dist one way or the other until it starts up, then finish off with a timing light.

if you think its getting to much fuel, and you have tired multiple times to crank it up. you might have started washing down the cylinder walls already. take the oil dipstick out and see if the oil smells like gas.

[coffey_5.0]

rgr that. i will hopefully get a chance to work on it a little this weekend. thanks for all the help. i will let you know how it turns out.

[coffey_5.0]

alright i played around with it this weekend, loosened all the rockers until just tight, but still no start. i'm contemplating taking it to the shop and have them look at it, but if anyone lives in augusta, ga i wouldnt mind a little help first?

[1slo5.0]

Originally Posted by coffey_5.0 alright i played around with it this weekend, loosened all the rockers until just tight, but still no start. i'm contemplating taking it to the shop and have them look at it, but if anyone lives in augusta, ga i wouldnt mind a little help first?

Adjusting your rocker arms that way is not the proper way and is going to further complicate your problem.

[ryans88gt]

Originally Posted by coffey_5.0 alright i played around with it this weekend, loosened all the rockers until just tight, but still no start. i'm contemplating taking it to the shop and have them look at it, but if anyone lives in augusta, ga i wouldnt mind a little help first?

See my post above about how to adjust your rockers. If you don't understand it, take the car to someone that knows what they are doing.

[coffey_5.0]

ah ok i see...i will hit this up again this weekend