mahoney944

I'm about to install the freeze plugs in the main oil galley. I know some people use sealers on it and others just tap them in. It crossed my mind to use some of the loctite 574 that I used on the girdle as it's designed to seal metal to metal gaps up to about .01 in or so. Assuming the plug will most likely push the loctite right out anyhow. Can't see where it would hurt and the excess would just wash away after the first startup? Thoughts on this? Don't want a leak here!

951and944S

I use the green loctite, says "sleeve retaining" on the tube.

Then, using a small chisel (not sharp with a 1/16-1/8" flattened point), stake the raised boss outside the bore for the plug in 6-8 spots.

Track engines....never had one come out.

T

V2Rocket

...how big (OD) are the plugs?

mahoney944

dont have an exact measurement but approximately 1in or so

mahoney944

are you​ saying you drive the plug in then ping the edge of the plug? Or drive it in with the chisel? I figured I use the loctite 574 and tap the plug in with a socket and extension combo until it stops. My other block with assumed factory plugs we're tapped past flush about .125 in or so

Paulyy

That works.
The water pump goes over the front one don't forget. So if you stuff it up and it leaks, prepare to remove the water pump.

When i got my rebuild kit, my plug was to small, so we put the original one back in. ended up leaking after a few months. loctite was used. so we replaced it with 1 we made and also had oring seal on it because it was something i didn't want leaking again.

gruhsy

Can someone post some pics of all the locations as a reference so everyone is on the same page? Just a thought.

cruise98

Use a sealant on them. I have had one leak and that will ruin your day!

There are three plugs, but the front and rear are the only ones listed as spares. The one in the vertical bore is a mystery part number. I have searched and searched for it, but I may have found it in the 968 engine diagrams.

mahoney944

The vertical plug on my engine was replaced by a pipe tap by Lindsey Racing. Not sure what the original was.

mahoney944

Am I wrong for thinking loctite 574 is a good loctite to use? It seems to be in its wheel house ( metal to metal at less than .01 gaps)

mahoney944

front


Rear still has plug installed


Vertical plug bottom of cylinder

951and944S

Drive in normal with sleeve retaining loctite...., it's not a gap filling anaerobic, it's for locking bushings and races. Then stake the aluminum block boss 90 degrees to the bore, flat with the face of the opening with chisel described.

This makes impressions that overhang the diameter of the bore.

When you remove them, in preparing your block, this allows you to use a long bottle brush to clean the passage with soap and water on your stand before assembly. This is the only reason I remove them anyway.

T

mahoney944

it looks like the sleeve retaining loctite is an anaerobic type sealant?

951and944S

Yes that's it. Didn't mean to mislead that it wasn't anaerobic, just that it wasn't the gap filling type like 574.

I use the Permatex brand, NAPA store keep nit in stock.

I use it on automatic transmission bushings and manual transmission bearing races.....anything you want to lock into a clean bore.

T