Freshly built and painted motor found threaded holes on sides of block? What r they?

**SleeperGS** · 07-18-2012

As the title states, just rebuilt and painted my motor...finally......anyways, puting tranny on and noticed 3 threaded holes on each side of the block by the knock sensors, what are they for??? I dont remember taking anything out of the old motor or seeing that these were missing? Looked on google and says something about 'girdle' bolts for the main caps???.. Pic inlcuded. Please help. Also i need a ported TB and have left messages for people to no avail. Main concern is these threaded bolt holes....looks like oil would leak.
Pictures by KEVINDLITTLE - Photobucket

As usual,
Many thanks
Kevin

**PurpleGuy** · 07-18-2012

Not sure. But you can link the image to the forum. Just click on the very last link that appears when you drag the cursor over the pic.

**BillBoost37** · 07-18-2012

To the left of the knock sensor is the AC bracket hole. for the rear bracket. To the right..I think stays empty.

There are girdle bolts aka side bolts into the main bearings. but there's one in each bearing. So you'll see 4 of them on each side.

**BillBoost37** · 07-18-2012

**SleeperGS** · 07-18-2012

There are 3 on each side, not counting the a/c brackets...I think... You can see the main caps.....It appears like a 10mm bolt would fit there.....oone on each cylinder.....oil would have to leak...again, I think

**BillBoost37** · 07-18-2012

If you can tell they are at the mains..then yes. There should be bolts in there. I remember them being about 10mm Lemme look for antoher pic.

**Rico** · 07-18-2012

Originally Posted by SleeperGS

There are 3 on each side, not counting the a/c brackets...I think... You can see the main caps.....It appears like a 10mm bolt would fit there.....oone on each cylinder.....oil would have to leak...again, I think

There are 3 main cap cross bolts on each side. Number 4 cap (next to flex plate) does not have these.

**BillBoost37** · 07-18-2012

My pictures suck

And then I find what I want.

And yes on the three

**SleeperGS** · 07-18-2012

are they an kind of special bolt? O ringed or anything to prevent oil from leaking? 3 of them per side right (6)?

**Rico** · 07-18-2012

There is sealant on the underside of the head and they are TTY bolts.

**BillBoost37** · 07-18-2012

yes..3 per side..nothing special that I can remember. Those pics got some dust on them.

**SleeperGS** · 07-18-2012

Pardon me for maybe asking the same question that may have been answered already but, I need 6 bolts.......perrmatex on all of them, what kind of thread and what size, and where the hell do i get them??
Thanks

**SleeperGS** · 07-18-2012

i just dont know how long they need to be, or if they need to touch on something on the insde.

**Rico** · 07-18-2012

GM dealer.

They'll have the sealant already on them.

**SleeperGS** · 07-18-2012

are they called main cap bolts?

**Rico** · 07-18-2012

Call your local GM parts counter or walk in. They'll know exactly what you're talking about.
Tell them they're the 6 cross bolts for the main caps that have sealant on the threads and the head.

**SleeperGS** · 07-18-2012

By the way... Do you like my color choice on the block?

**Rico** · 07-18-2012

Looks like Elvis' engine from the 70's.

**SleeperGS** · 07-18-2012

Your actuallt not far off, color that is. I have a Regal ,not a GTP. Buick used a similar color gold engine paint in the 50's or 60's. Thought I would be different.

**SleeperGS** · 07-18-2012

What do those bolts do? Keep the mains from coming loose or what?

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