Water pump -Water jacket

[Conn47D24]

On the D24 block behind the water pump, there is the water tube ,and the larger round opening. 

The back of the water pump only has the tube opening.

 

What is the round hole for?

 

[BobT-47P15]

Likely for a "freeze plug".   

I will let those with more knowledge answer......

[9 foot box]

     I think the large block hole prevents the weep hole in the pump from plugging. And it is a bypass, till the thermostat opens.

[DJ194950]

On 11/14/2018 at 3:10 PM, Conn47D24 said:

On the D24 block behind the water pump, there is the water tube ,and the larger round opening. 

The back of the water pump only has the tube opening.

 

What is the round hole for?

 

 

 

If that is red hi-temp silicone under that plate I hope you have better luck than I did. That leaked and all attachment bolts did also when warmed up to op temp.

 

I removed the pump and redid it all using Permatex aviation sealer on all including that very rough area that cover the water ports pf the block shown in the second picture.  ?

 

DJ

[Conn47D24]

Oh boy.

You had the gasket too?

 

[DJ194950]

I made a copy of the gasket from sheet stock and did it all again.

 

DJ

[_shel_ny]

Internal bypass hole?   Not used on your block.

 

Never mind.  Read too fast. Thought you were talking about the pump hole

Edited November 20, 2018 by _shel_ny