Girdle Oil Pan Studs

[Underboost]

Has anyone ever noticed a problem with their girdle oil pan studs? While pulling the pan just to check the bearings I found 3 studs cracked inside the block? I took the pan off and was taking the studs out and noticed three came out with the twist of my fingers. They where cracked from block stress "I guess" That's all I could think of. Everything was torqued to spec. ARP doesn't make that small of a thread count and size stud. :frown:

Anyone???

 

[gnxtc2]

I heard of this happening but never to me. I usually put some blue loctite on the end that goes into the block.

Did you try calling ARP for the studs? They have alot of bulk items that are not listed in their catalog. I usually deal with Kammy, she knows her fasteners.

Billy T.
gnxtc2@aol.com

 

[Grumpy]

ARP does have them

 

[boostjunkie]

Has anyone ever noticed a problem with their girdle oil pan studs? While pulling the pan just to check the bearings I found 3 studs cracked inside the block? I took the pan off and was taking the studs out and noticed three came out with the twist of my fingers. They where cracked from block stress "I guess" That's all I could think of. Everything was torqued to spec. ARP doesn't make that small of a thread count and size stud. :frown:

Anyone???

I have built lots of girdle motors and all the guys running trans brakes seem to have this problem . ARP has studs but they still pull from the pan rail .Shawn

 

[ijames]

Are you saying the studs cracked and broke, or pieces cracked out of the pan rail, or did the threads strip out of the pan rail? Just trying to understand as I've never heard of this before.

 

[boostjunkie]

Are you saying the studs cracked and broke, or pieces cracked out of the pan rail, or did the threads strip out of the pan rail? Just trying to understand as I've never heard of this before.

90% of the time the studs are broken i would say 2 or 3 broken studs is common on a hard run motor with a trans brake , have seen the threads pulled from the pan rails on a few . Shawn

 

[V6RACER]

Check your machine work. I've had two shortblocks machined by different shops and one would break pil pan studs and the other would not. There is something to say about a good machine shop.

 

[Underboost]

Are you saying the studs cracked and broke, or pieces cracked out of the pan rail, or did the threads strip out of the pan rail? Just trying to understand as I've never heard of this before.

The stud broke inside the block but there was still enough threads to unscrew the stud out of the block. Does that make any sense? Basically the amount of threads that went into the block crack at the half way point. The block was not affected at all.

 

[Underboost]

I have built lots of girdle motors and all the guys running trans brakes seem to have this problem . ARP has studs but they still pull from the pan rail .Shawn

Yep, I launch off the trans brake every time. :redface: 13 to 16psi

 

[Underboost]

Check your machine work. I've had two shortblocks machined by different shops and one would break pil pan studs and the other would not. There is something to say about a good machine shop.

Did one of you're motors have steal mains and the other did not? I was running stock mains I am know going with steal after seeing that. I really don't think it will do much but it's peace of mind. The car will be going much faster now that I'm putting Alum heads and a bigger cam in.

The whole reason why I found this problem was I had the Iron heads off changing Head Gaskets "again" and was swapping with Alum Heads then said screw it! I'll just pull the motor out and check everything. Good thing I did

 

[MSDGN]

I have about 70+ 10 second runs on my motor that is girdled with stock mains and I use a transbrake...no problems...had the pan off last year for inspection and studs were all OK...I agree with the statement about getting good machine work... the clearance between the girdle and pan rail when the mains are torqued down is critical...excess clearance can put strain on those pan rail studs...JMO

 

[Underboost]

I have about 70+ 10 second runs on my motor that is girdled with stock mains and I use a transbrake...no problems...had the pan off last year for inspection and studs were all OK...I agree with the statement about getting good machine work... the clearance between the girdle and pan rail when the mains are torqued down is critical...excess clearance can put strain on those pan rail studs...JMO

Let me ask you this. Are you guys machining the caps down to fit the spacers/shims or are you guys going flush with the caps against the girdle?

 

[Underboost]

ARP does have them

Grumpy would you happen to have a part #?

 

[ijames]

Thanks for the info. I've never heard of this and have been considering doing a girdle - one more thing to keep an eye on.

 

[boostjunkie]

Yep, I launch off the trans brake every time. :redface: 13 to 16psi

Wow i launch harder off the foot brake whats you 60s with a 13 psi trans brake launch. should be around low 1.40s to high 1.30s my car got 1.46 60s off the foot brake

 

[Underboost]

Wow i launch harder off the foot brake whats you 60s with a 13 psi trans brake launch. should be around low 1.40s to high 1.30s my car got 1.46 60s off the foot brake

My best 60 so far is a 1.45 with 1.5 on the pinion angle. Changing that to 3.5 - 4 before my next track visit.

I would love to launch off the foot brake but I have stock drums an wheel cylinders. :redface: I tell you what if I launched off the foot brake I would put my 200 back in. Less torch er on the trans & crank

 

[V6RACER]

Did one of you're motors have steal mains and the other did not? I was running stock mains I am know going with steal after seeing that. I really don't think it will do much but it's peace of mind. The car will be going much faster now that I'm putting Alum heads and a bigger cam in.

The whole reason why I found this problem was I had the Iron heads off changing Head Gaskets "again" and was swapping with Alum Heads then said screw it! I'll just pull the motor out and check everything. Good thing I did

The engine that had steel mains is the one that would break the oil pan studs. The engine in my car now has stock caps and both times I pulled the motor to fix the dented oil pan the studs were good.

 

[Underboost]

The engine that had steel mains is the one that would break the oil pan studs. The engine in my car now has stock caps and both times I pulled the motor to fix the dented oil pan the studs were good.

How was the oil pan getting dented?

 

[V6RACER]

How was the oil pan getting dented?

Look here..

Video - Big Wheelie from Need2Speed's Dead Hookers II at Bradenton Motorsports Park Florida. TSM Buick V6

and here...

Bumper Draggin - Yahoo! Video

 

[Underboost]

Look here..

Video - Big Wheelie from Need2Speed's Dead Hookers II at Bradenton Motorsports Park Florida. TSM Buick V6

and here...

Bumper Draggin - Yahoo! Video

I knew that was a stupid question