View Full Version : C5 starter/2 long bolt starter question

04-09-2014, 09:54 AM
This question relates to a problem that has been discussed on LS1 qne other Corvette forum sites about the starter case cracking and possible damage to the engine block. The question that I cannot seem to find the answer to from Corvette forum searches or even going through GM/AC Delco part numbers is:

What is the GM, and the AC Delco part numbers for the replacement 2 long bolt starter that fits the 97-2004 C5

I stopped by a Chevy local dealer yesterday and got the following part numbers:

97-2001 = ACDelco - 323-1063 GM# 10465385
02-2004 = ACDelco - 323-1450 GM# 10465547

I was unable to see either starter at the dealer for comparison, but looking at every picture available I could find on websites both look exactly the same 1 long bolt, 1 short bolt, and some sites list the 2002-2004 version as the replacement for the old version.

Is the 2002-2004 starter the 2 long bolt version or not?

04-10-2014, 03:57 AM
HI there,

First, the fact that the short/long bolt starter is any less reliable is garbage. There is not one documented test that there has ever been an issue.

Second, the starter is a simple one, use the one out of the trucks.

Fact is, unless there is actual internal engine binding, there is ONLY ONE THING that caused a broken snout on a starter. INCORRECT INSTALLATION OF STARTER!

People do not torque the fasteners correctly, or dont use the correct bolts or attempt to use shims where SHIMS SHOULD NEVER be used.

Why you would change the starter if its not giving you an issue????

Maybe if the engine is heavily modified with higher compression, I can see that.

Starter bolt torque is 37 ft lbs. If you over torque the fasteners, you will distort the snout. If you use the incorrect bolts, you will misalign the starter to the block and THEN you can damage the block.

12592294 is the starter for the 5.3 LM7 truck engine that will work with 2 equal length bolts.

But as I said in the beginning, only MISINSTALLATION or internal engine binding can create this type of failure.

Allthebest, Paul

04-10-2014, 04:45 AM
I kind of was wondering what Paul said. Why is this an issue for anyone?

If the starter is bad, you use the same bolts you took out from the old to install the new. And if you really wanted to get specific, have the old starter re-built instead of replacing and installed back in, thus it's the same identical case it had when it rolled off the line.
I rebuild all my alternators and starters, no overseas junk for me, been there, done that!

Now as Paul also stated, unless the engine was heavily modded but as Paul also stated, if instaled correctly, then there should not be an issue. Or the enigne builder should be able to state what to use in place of the old hardware.

04-10-2014, 05:38 AM
Paul, Thank you for the informative reply it is exactly the information I was looking for and as you stated the only failures I have read about were attributed to an internal (hydrolock) conditions. I have never had a problem with my 98's original starter. All I was looking to do was find out what the best alternative would be if I had to replace the current starter sometime in the future.

Toolguy - you still up in my old neighborhood, Rochester? I'll have to make a point of trying meet up with you next time I'm headed through there on the way up to Harbor Springs.

04-10-2014, 07:14 AM
Toolguy - you still up in my old neighborhood, Rochester? I'll have to make a point of trying meet up with you next time I'm headed through there on the way up to Harbor Springs.

Ha! I thought that ws you but I was not sure since this was your first post! :) Car pic looked familiar to me though...

Yes, I'm still here in MI and Rochester. I'm wanting to move to GA though and I'm trying pretty hard to do just that.

Next time you stop by you'll probably be pretty amazed at how poor the roads are here in MI! The worst I've ever driven on in my life and have to be worst in the nation! Completely horrible and unacceptable! :mad: How can parts of Canada which are twice as cold as MI, have way better roads??? :confused:
Yet another reason on my list to leave this state... Rochester does not have as bad roads and is still beautiful, my high tax dollars are work and that's fine with me.

04-10-2014, 09:38 AM
Not surprised by the bad roads, and probably worse due to this winters conditions. Keep working on getting south, after being down here for 20 years now, no regrets.

Yes it looks like I'm a noobie here, somehow got dropped out of the forum a year or two ago either when it was taken over or moved to another hosting outfit so signed back up last year. Work/travel for a few years kind of slowed down the free time to hit the forums. That's why when I'm looking for a straight answer and can't find it I ping Paul. I'll try to see if we can work a stop off up there during the trip up north this summer.

I put the cover on the 98 for a few weeks, the tree pollen is bad. It's a southern thing :cool:

04-11-2014, 05:12 AM
Yes the old site kind of was abandoned and we could not do anything about it, thus this site started up.

And sure, if we can meet up one day that would be great! :cool:

And right again, the winter did not help the roads, but there are also other factors such as why does a new road only last two years it seems? Crappy work, materials, low budgeted jobs, it's all coming full circle here in the state and now we are so behind the 8 ball. It'll take 15 years to fix all the roads here!

The Big Guy
04-16-2014, 01:43 PM
99 6mm coupe 149,000 original owner miles. Finding a lot of information regarding the " broken starter " , I am totally confused as to what to do regarding your latest information. Car is totally stock and maintained to the 10's. Driven as a spirited 80 year can pound it once in a while. Please advise as well as possible as to the following : !. What do you consider the life of an original starter that has not been abused I.E. total miles. 2.# of years in usage. Would you replace the starter just as a precaution, due to the latest possible problem ? Further, would you replace it due to the mileage / years in operation ? I ask your professional opinion knowing there are variations in all of these questions.
Again Paul, your valued opinion is most highly appreciated.

The Big Guy !

04-18-2014, 05:25 AM
HI there,

There are a few factors to starter life.

#1, exposure to heat, especially if you have headers, which you note you do not. I usually install the shield for the solenoid from the trucks just to give me a bit of extra insurance for my customers for longevity.

#2, correct torque on both starter bolts to block at 37 ft lbs and the battery positive cable terminal at 11 ft lbs and the S terminal at 37 INCH LBS.

#3, modifications hurt starters, higher compression, superchargers and the like put strain on the snouts of those starters.

#4, storage conditions meaning oxidation of key electrical connections like the battery, engine grounds, starter mounting locations and other factors.

Personally, I have seen starters die after 4 years, I have seen others last the life of the vehicle.

You conditions may vary this but the biggest single factor is INSTALLATION. if you havent had a problem, chances are, your not going to.

Allthebest, Paul

The Big Guy
04-18-2014, 08:19 AM
Thank you, Paul for your excellent answers to my previous questions. You have directed my thinking to " drive it and enjoy it ". As the old saying goes, " if it ain't broken, don't fix it ".Glad to have you back !
The Big Guy !

04-18-2014, 08:33 AM
Yes, do not replace unless you are having issues. And then if you do have an issue, I can give you the guy I use to rebuild alternators and starters in our area.
That way you get the same identical starter and case your car came with off the assembly line. Then there would be no issues with fitment, just make sure all bolts are torqued to the specs Paul lists. This rebuilder has re-built three alternators of mine, no starters yet but he does those too.