I want to replace my aging bolts while I am replacing the gaskets. Does anybody make a bolt kit for the 3.1L (1992)?

 

So, looks like I have to create my own kit from stock bolts. I stacked the timing cover and water pump on a flat surface and put all the bolts into their holes (one noteable exception). I have nice thread checkers and calipers so I measure each of the bolts that came off the engine. Here is the list:

Through Water Pump and Timing Cover
M6-1.0x25 Flange Head Grade 8.8 Qty of 3
M8-1.25x35 Flange Head Grade 9.8 Qty of 1
M8-1.25x70 Flange Head Grade 9.8 Qty of 3
M10-1.5x70 Flange Head Grade 9.8 Qty of 1 (Exception??)
M10-1.25x75 Flange Head Grade 9.8 Qty of 3
Through Timing Cover Only
M8-1.25x35 Hex Bolt with Washer Grade 8.8 Qty of 3

As to the exception noted, I don't know why there is one M10 shorter than the other three. The depth of the water pump timing cover stacked holes are the same for all 4 bolts. I can only guess that the block requires one shorter bolt but I haven't been able to find which hole that bolts needs to fill. I also don't know why you wouldn't use flange head bolts in place of the 3 M8 hex bolts at the bottom of the timing cover.

 

i used the bolts from a 3.4.... I didn;t like those torx bolts. Fits perfect!