new clutch/no start
12-01-2015, 08:47 AM
#1
new clutch/no start
I pulled and replaced the clutch in my 90 c4 l98 w/six speed manual.now my car wont start.i thought it was the battery so I charged it to a full charge and now it TURNS but wont start and at times if I turn it long enough I hesr somev rsther loud clanging like something that's turning is thrown off baslance or something.im at a loss here this is my first corvette and I'm new to them in general.could it be something jammed up in side the housing or in my treansmission?i checked the obd but it just gives me a code twelve as usual.any thoughts?I NEED YOUR HELP.also so you know I did a dual mass to single mass conversion.flywheel(single mass) disk,pressure plateand release bearing.i purchased the kit thru ecklers.thank you.
12-01-2015, 10:49 AM
#2
I'd think that maybe you need to check and confirm the starter pinion to the ring gear fitment after having the starter bench checked at a local AP store or shop.
Have you tried to push start the car?
This was a DIY install or a "for hire" install? I assumed DIY since you posted here. Were there any concerns/questions that you might have had during the install?
Have you tried to push start the car?
This was a DIY install or a "for hire" install? I assumed DIY since you posted here. Were there any concerns/questions that you might have had during the install?
12-01-2015, 09:27 PM
#3
I'd think that maybe you need to check and confirm the starter pinion to the ring gear fitment after having the starter bench checked at a local AP store or shop.
Have you tried to push start the car?
This was a DIY install or a "for hire" install? I assumed DIY since you posted here. Were there any concerns/questions that you might have had during the install?
Have you tried to push start the car?
This was a DIY install or a "for hire" install? I assumed DIY since you posted here. Were there any concerns/questions that you might have had during the install?
12-02-2015, 05:43 AM
#4
Drifting
So are you saying the engine does crank but cranks slow like its binding?
And it wont fire up. Have you tried shimming the starter since you have changed the flywheel ? Pull the starter back off and bench test it make sure its working correctly. I assume you have bled the clutch, and the vehicle is for sure in neutral.
And it wont fire up. Have you tried shimming the starter since you have changed the flywheel ? Pull the starter back off and bench test it make sure its working correctly. I assume you have bled the clutch, and the vehicle is for sure in neutral.
12-02-2015, 07:31 AM
#5
Tech Contributor
Which flywheel and clutch setup did you use?
Several years ago I installed an aftermarket single mass flywheel and clutch in my '96. Supposed to be a direct bolt on for the dual mass setup. Long story short, the overall "stack" was too thick and was binding on the clutch fork when the pedal was depressed. Engine would not start and would spin only a little so no real noise to hear. Of course without the clutch depressed while I was outside the car, I could spin the engine fine by hand. After changing the starter, the battery, shimming, etc all to no avail I decided to pull the transmission and found a bell housing full of shavings off the pressure plate. Had to get a new pressure plate and clearance the clutch fork.
Original "bolt-on parts with the um...."clearance issue"...
A few shavings....
Aluminum pressure plate grinds down rather quickly...
Grind marks on fork...
The second time....
Checking clearance on the second new pressure plate...
Side view of fork after profiling...
If you look close you can see where the clutch fork is clearanced...
Sometimes the pivot ball will cause the fork to interfere, but that was not my case. It was fully seated and was the original bell-housing and stud.
Several years ago I installed an aftermarket single mass flywheel and clutch in my '96. Supposed to be a direct bolt on for the dual mass setup. Long story short, the overall "stack" was too thick and was binding on the clutch fork when the pedal was depressed. Engine would not start and would spin only a little so no real noise to hear. Of course without the clutch depressed while I was outside the car, I could spin the engine fine by hand. After changing the starter, the battery, shimming, etc all to no avail I decided to pull the transmission and found a bell housing full of shavings off the pressure plate. Had to get a new pressure plate and clearance the clutch fork.
Original "bolt-on parts with the um...."clearance issue"...
A few shavings....
Aluminum pressure plate grinds down rather quickly...
Grind marks on fork...
The second time....
Checking clearance on the second new pressure plate...
Side view of fork after profiling...
If you look close you can see where the clutch fork is clearanced...
Sometimes the pivot ball will cause the fork to interfere, but that was not my case. It was fully seated and was the original bell-housing and stud.
Last edited by 96GS#007; 12-02-2015 at 07:58 PM.
12-02-2015, 08:05 PM
#6
Le Mans Master
Which flywheel and clutch setup did you use?
Several years ago I installed an aftermarket single mass flywheel and clutch in my '96. Supposed to be a direct bolt on for the dual mass setup. Long story short, the overall "stack" was too thick and was binding on the clutch fork when the pedal was depressed. Engine would not start and would spin only a little so no real noise to hear. Of course without the clutch depressed while I was outside the car, I could spin the engine fine by hand. After changing the starter, the battery, shimming, etc all to no avail I decided to pull the transmission and found a bell housing full of shavings off the pressure plate. Had to get a new pressure plate and clearance the clutch fork.
Several years ago I installed an aftermarket single mass flywheel and clutch in my '96. Supposed to be a direct bolt on for the dual mass setup. Long story short, the overall "stack" was too thick and was binding on the clutch fork when the pedal was depressed. Engine would not start and would spin only a little so no real noise to hear. Of course without the clutch depressed while I was outside the car, I could spin the engine fine by hand. After changing the starter, the battery, shimming, etc all to no avail I decided to pull the transmission and found a bell housing full of shavings off the pressure plate. Had to get a new pressure plate and clearance the clutch fork.
Put that in went to start and got one big "clunk". After everyone else telling me it was the battery, the ground, yada yada. Well, I didn't buy that. Took it out and measured both FW's against stock...no difference.
The culprit was the one little thing that I did not look at...the pivot stud had grooves worn in the side. Located a replacement, reinstalled, and whala...fired up like nothing was ever wrong, and I did love that spec fw, really helped her move out.
12-04-2015, 04:49 PM
#7
Melting Slicks
when I did my dual mass to single mass conversion, the first flywheel I received was for an Fbody with a T56 transmission; they LOOK very similar and will bolt in, but they are not interchangeable with a flywheel intended for use in a corvette with a ZF transmission. I think this confusion is more common than supposed. So, first thing, I would double check the part number of your new flywheel and confirm that it is in fact, intended for use with a ZF trans.
Last edited by mtwoolford; 12-04-2015 at 04:50 PM.
12-04-2015, 04:54 PM
#8
Melting Slicks