Alaskan_TA
Well-Known Member
The bolt at top was loose, the one at right was tight & the two with the broken ears were barely snug. Half of the transmission to engine bolts were missing too......
Small block 727 flexplate carnage.
- Thread starter Alaskan_TA
- Start date
-
When flex plate is under stress, this is the common place for them to break. These are metal fatigue cracks caused by what you already know- loose bolts. When repairing, don't forget to lube the snout on the torque converter.
Alaskan_TA
Well-Known Member
The 'repair' involves installing the engine in front of an A230 3-speed manual transmission. 
This was found while taking the parts car apart.
This was found while taking the parts car apart.
If you plan on going stick you better investigate your crankshaft to see if it will accept the proper bushing. Good luck.
Alaskan_TA
Well-Known Member
Already did. All is well.
Fisher
Old Guy with a Cool car.
That thing been sitting outside in the rain? Man i would of tossed that in the garbage long ago.
Coffee&Cars
Well-Known Member
With all the loose bolts you found I would not blaim it on the parts. The installer set it up to fail.......
271 (red) loc-tite is your friend. Keep a tube of it handy and use it.
john dodge
downunder wonder
seen it a million times...also .people using the wrong( too long ) convertor bolts bottoming out on the convertor ...
dibbons
Well-Known Member
Just pulled out my trans and motor. A few years ago, I had given a trans shop four new convertor to flex plate bolts (and some blue loctite) to replace the old ones when they changed the pan gasket. What do I find? Three of the bolts I gave them and one 9.8 metric bolt (shorter than factory bolts), all bolts seemingly over-tightened.
Alaskan_TA
Well-Known Member
On the rust, the dust shield was not installed either, & this car was driven in the PA salt.
The prior owners loved burnouts too, 3.90 Sure-grip with 10" wide tires in the back.
Used & arguably abused, but the past owners did have some fun with it.
No need to blame the parts.
The prior owners loved burnouts too, 3.90 Sure-grip with 10" wide tires in the back.
Used & arguably abused, but the past owners did have some fun with it.
No need to blame the parts.
Coffee&Cars
Well-Known Member
A tip? I installed a mid-plate, 090 thick. I installed the crank spacer. also .090 thick. With the new combined thickness of the spacer and the thick SFI Flexplate the .500 inch Mopar Flexplate bolts were to short. I needed .575 to use all the threads on the crankshaft hub. Solution...Pontiac Flexplate bolts. The heads of the bolts are to tall so you have to reduce the height of the head on the bolt. Use your old "slim head" Mopar bolts as a guide to adjust bolt head thickness. Worked great!
Coffee&Cars
Well-Known Member
The only bad thing is Pontiac uses one less bolt than Mopars. So you have to buy 2 sets.
Alaskan_TA
Well-Known Member
Look on the bright side - that is a great reason to not by a Pontiac.
Coffee&Cars
Well-Known Member
This is the only Pontiac part I have ever bought. I have never owned a Pontiac, never will. But I did Moparise that GM part.
-
