starter/flexplate problem - The 1947 - Present Chevrolet & GMC Truck Message Board Network

beebster · 06-01-2010, 09:44 PM

My buddy bought a 72 truck cause the previous owner couldn't start it.(he bought it without hearing it run) The starter barely and i mean BARElY touches the flywheel. It makes that terrible grinding sound. We went to all the auto parts stores and discovered it's probably NOT the starter.
The only thing we could figure is the flywheel is on backwards. It's a NOT original 305 in it with a 350 tranny.
here's the question and a pic. IS THE FLYWHEEL ON BACKWARDS?

beebster · 06-01-2010, 09:46 PM

the pic is me directly under the truck, i removed the other bolts and took the pic before removing the last one.

beebster · 06-01-2010, 09:51 PM

Another pic.
I'm pretty sure it's backwards.

crapy67 · 06-01-2010, 09:56 PM

From the pics it looks like its in backwards to me.

beebster · 06-01-2010, 09:58 PM

thanks crapy, let's see how many more think so.

Camaro_nut2001 · 06-01-2010, 09:59 PM

It is on backward. While you have it off, check to see if it's the correct one for the 305. I've never seen or heard of one being on backward untill now.

beebster · 06-01-2010, 10:05 PM

thanks camaro, good point.
i dont think he/we even know if it's a 305 or 350.
time for me to ID this motor.

GASoline71 · 06-02-2010, 12:31 AM

It's on backwards... the "dimples" need to be towards the torque converter.

Quote:

Originally Posted by Camaro_nut2001

It is on backward. While you have it off, check to see if it's the correct one for the 305. I've never seen or heard of one being on backward untill now.

I'd never heard of it as much as I hear about it on this site.

Gary

jbristo67 · 06-02-2010, 12:39 AM

They aren't different from 305 to 402. I have put one on backwards before. I didn't figure it out until I went to bolt up my converter. I was 19 and not to expierenced at the time. Lucky I was using an over head lift with a tranny Jack so it litterally took 10 min to drop the tranny and fix it. I put that tranny in twice in 45 min thanks to the lift

beebster · 06-02-2010, 02:21 AM

thanks jbristo and gasoline!
everybody pretty much agree's it's on backwards and i agree too.

jbristo67, you remember the andy griffith episode where gomer has to work on some guys car but needs to stay at the jail? He ended up taking the "whole" car apart and putting it back together "inside" the jail. LOL
when you said that about dropping the tranny twice in 45 min, thats what it reminded me of. ha ha.

dwaite72lnghrn · 06-02-2010, 06:47 AM

Check the tooth count, If it is barely touching the starter. It could be a 12 3/4" flex-plate off a car with 153 teeth, Instead of a 168 tooth 14" for a truck.

haysonj · 06-02-2010, 08:53 AM

I just posted about this 2 days ago, I was lucky and caught it while the engine was out of the truck. It is backwards the raised dimples go toward the converter.

beebster · 06-02-2010, 10:13 PM

thanks everybody that responded! problem solved.
the truck is fixed and running. Needs timing to be adjusted but the good part is that there is NO screeching or noises coming from the starter/flexplate.
The only bad part is tranny fluid in your hair (spilled a bunch removing the lines), damm i hate that. LOL

red71cheyenne · 06-03-2010, 12:27 AM

Quote:

Originally Posted by jbristo67

They aren't different from 305 to 402. I have put one on backwards before. I didn't figure it out until I went to bolt up my converter. I was 19 and not to expierenced at the time. Lucky I was using an over head lift with a tranny Jack so it litterally took 10 min to drop the tranny and fix it. I put that tranny in twice in 45 min thanks to the lift

I did the same thing with the throwout bearing on the Blazer. First time I ever put a manual transmission and transfer case in. Then it was the second time I ever did it!

raycow · 06-03-2010, 02:50 AM

Ya know, I'm still scratching my head on this one. Isn't the bolt pattern asymmetrical, so the flywheel can go on only one way? The flywheels for some engines have a weight on them, so this would have to be a requirement.

Ray

beebster · 06-03-2010, 03:32 AM

you would think that, but believe me i found out that you CAN put a flywheel on backwards. ha ha.
once i turned that flywheel around it looked and started the way god and GM intended it to , perfect.
right now i'm in the process of taking off that holley it came with and putting a Qjet.
Love them Qjets.
man, i love it when a plan comes together and works out right.
my buddy is happy with this truck and i'm glad to be able to help out.

06-01-2010, 09:44 PM	#1
beebster Registered User Join Date: Jan 2009 Location: Aurora,Il ..born,raised and still live in the same house Posts: 286	starter/flexplate problem My buddy bought a 72 truck cause the previous owner couldn't start it.(he bought it without hearing it run) The starter barely and i mean BARElY touches the flywheel. It makes that terrible grinding sound. We went to all the auto parts stores and discovered it's probably NOT the starter. The only thing we could figure is the flywheel is on backwards. It's a NOT original 305 in it with a 350 tranny. here's the question and a pic. IS THE FLYWHEEL ON BACKWARDS? Attached Images

06-01-2010, 09:46 PM	#2
beebster Registered User Join Date: Jan 2009 Location: Aurora,Il ..born,raised and still live in the same house Posts: 286	Re: starter/flexplate problem the pic is me directly under the truck, i removed the other bolts and took the pic before removing the last one.

06-01-2010, 09:51 PM	#3
beebster Registered User Join Date: Jan 2009 Location: Aurora,Il ..born,raised and still live in the same house Posts: 286	Re: starter/flexplate problem Another pic. I'm pretty sure it's backwards. Attached Images

06-01-2010, 09:56 PM	#4
crapy67 White wall terror Join Date: Feb 2009 Location: Croydon, Pa. Posts: 152	Re: starter/flexplate problem From the pics it looks like its in backwards to me.

06-01-2010, 09:58 PM	#5
beebster Registered User Join Date: Jan 2009 Location: Aurora,Il ..born,raised and still live in the same house Posts: 286	Re: starter/flexplate problem thanks crapy, let's see how many more think so.

06-01-2010, 09:59 PM	#6
Camaro_nut2001 Chevy Lover Till The End. Join Date: Dec 2009 Location: Mascot TN. Posts: 795	Re: starter/flexplate problem It is on backward. While you have it off, check to see if it's the correct one for the 305. I've never seen or heard of one being on backward untill now. __________________ 1969 Chevy SWB Big Block - Under the knife as of 12/26/2011 1989 Chevy Silverado, 4X4 - Daily Driver 1996 Chevy Suburban K1500 - 4-Wheeler, Campin Truck 1968 Chevrolet Impala Sport Coupe - 327/350hp, TH400, all original. Members I've met: BamaBaxter, My Build: http://67-72chevytrucks.com/vboard/s...d.php?t=500359

06-01-2010, 10:05 PM	#7
beebster Registered User Join Date: Jan 2009 Location: Aurora,Il ..born,raised and still live in the same house Posts: 286	Re: starter/flexplate problem thanks camaro, good point. i dont think he/we even know if it's a 305 or 350. time for me to ID this motor.

06-02-2010, 12:39 AM	#9
jbristo67 resident oilfield trash Join Date: Jan 2009 Location: Lubbock TX Posts: 1,465	Re: starter/flexplate problem They aren't different from 305 to 402. I have put one on backwards before. I didn't figure it out until I went to bolt up my converter. I was 19 and not to expierenced at the time. Lucky I was using an over head lift with a tranny Jack so it litterally took 10 min to drop the tranny and fix it. I put that tranny in twice in 45 min thanks to the lift __________________ 1967 SWB C10 396/400 factory air factory tach (sadly had to send to a new home) 1986 Honda 70 Fourtrax 1991 Chevrolet K5 blazer 2wd 1982 Mastercraft Pro Star 190 Stars and Stripes 2002 Chevrolet Tahoe 2011 Nissan Armada

06-02-2010, 02:21 AM	#10
beebster Registered User Join Date: Jan 2009 Location: Aurora,Il ..born,raised and still live in the same house Posts: 286	Re: starter/flexplate problem thanks jbristo and gasoline! everybody pretty much agree's it's on backwards and i agree too. jbristo67, you remember the andy griffith episode where gomer has to work on some guys car but needs to stay at the jail? He ended up taking the "whole" car apart and putting it back together "inside" the jail. LOL when you said that about dropping the tranny twice in 45 min, thats what it reminded me of. ha ha.

06-02-2010, 06:47 AM	#11
dwaite72lnghrn Registered User Join Date: Jun 2002 Location: central pa Posts: 1,525	Re: starter/flexplate problem Check the tooth count, If it is barely touching the starter. It could be a 12 3/4" flex-plate off a car with 153 teeth, Instead of a 168 tooth 14" for a truck. __________________ 72 longhorn c30 502BB/th400/fact air/4.11rear/ custom camper 72 bug(the better half's) under reconstruction 2009 HHR aqua blue 71 GMC k20 350/sm465 2009 Chevy hd3500 6.6 Victory Red crew cab dually Dave & Jeanne

06-02-2010, 08:53 AM	#12
haysonj Registered User Join Date: Dec 2007 Location: Santa Maria, Ca. Posts: 1,423	Re: starter/flexplate problem I just posted about this 2 days ago, I was lucky and caught it while the engine was out of the truck. It is backwards the raised dimples go toward the converter. __________________ 69 Chevy 4x4 383 Power

06-02-2010, 10:13 PM	#13
beebster Registered User Join Date: Jan 2009 Location: Aurora,Il ..born,raised and still live in the same house Posts: 286	Re: starter/flexplate problem thanks everybody that responded! problem solved. the truck is fixed and running. Needs timing to be adjusted but the good part is that there is NO screeching or noises coming from the starter/flexplate. The only bad part is tranny fluid in your hair (spilled a bunch removing the lines), damm i hate that. LOL

06-03-2010, 02:50 AM	#15
raycow Registered User Join Date: Mar 2003 Location: San Francisco, CA USA Posts: 2,454	Re: starter/flexplate problem Ya know, I'm still scratching my head on this one. Isn't the bolt pattern asymmetrical, so the flywheel can go on only one way? The flywheels for some engines have a weight on them, so this would have to be a requirement. Ray

06-03-2010, 03:32 AM	#16
beebster Registered User Join Date: Jan 2009 Location: Aurora,Il ..born,raised and still live in the same house Posts: 286	Re: starter/flexplate problem you would think that, but believe me i found out that you CAN put a flywheel on backwards. ha ha. once i turned that flywheel around it looked and started the way god and GM intended it to , perfect. right now i'm in the process of taking off that holley it came with and putting a Qjet. Love them Qjets. man, i love it when a plan comes together and works out right. my buddy is happy with this truck and i'm glad to be able to help out.



Register or Log In To remove these advertisements.

Register or Log In To remove these advertisements.