[1990 332]

I used grade 10 from auto zone. Should I have used the originals? I don’t remember if I used loctite or not. Is loctite necessary ?

 

[dhager4692]

To quote Chuck from another post.

There is no "grade 10" in the SAE bolt grade system. Some metric bolts are CLASS 10.9 per the folllowing specifications:
Class 10.9:

• Head Marking: 10.9
  • Material: Alloy steel, quenched and tempered
  • Size Range: 5-mm to 100-mm

Proof Load (MPa): 830Min. Yield Strength (MPa): 940Min. Tensile Strength (MPa): 1040
Did you mean class 10.9??? The Deere part is a CH19101 BOLT which is an M8 x 45 metric bolt and most likely is a class 10.9... How were the bolt heads marked on the bolts you removed??

Note: a metric class 10.9 is roughly equivalent to the strength of a Class 8 SAE bolt...

Chuck

 

[Mike48321]

Your worried about the strength of a water pump bolt?

 

[dhager4692]

Your worried about the strength of a water pump bolt?

The ones he used were the same grade and strength as what he would have gotten at John Deere. So he essentially just put new bolts in,