Bolt torques on 346 XP Top End Rebuild

[g_man]

Got my parts and starting to reassemble. Can anyone tell me where to find what the torque should be on the 346 XP head bolts, exhaust bolts, and compression release. The 2 carb bolts too if you have them. Thank you very much !

gg

[newoodguy78]

@Spike60 

[Spike60]

Sorry, but no clue there. In 30 years I never paid attention to bolt torque specs. Just went by feel.

[g_man]

Thanks Spike. That's a good answer to me. I just wondered if it was critical for some reason.

gg

[Al_Smith]

Righty tighty ,lefty loosey .Tight is tight too tight is broken  ;D

[g_man]

I know a little about that last part  :(  And they are only 5 mm bolts. I'll shoot for tight is tight.

gg

[newoodguy78]

Glad to hear you decided for the rebuild. You end up getting oem parts or aftermarket?

[g_man]

Glad to hear you decided for the rebuild. You end up getting oem parts or aftermarket?

I ordered that kit through Amazon and it turned out they were OEM like Spike60 suspected.
gg

[Al_Smith]

To cut to the chase torque on a metric grade 10.9 which is about the same as an SAE grade 8 in 5 mm is 9 newton meters or about 79 inch pounds which about 6.6 foot pounds .Clear as mud .----there are charts on the internet for this stuff . ;) 

[g_man]

To cut to the chase torque on a metric grade 10.9 which is about the same as an SAE grade 8 in 5 mm is 9 newton meters or about 79 inch pounds which about 6.6 foot pounds .Clear as mud .----there are charts on the internet for this stuff . ;)

Very true. But I was worried about stripping the block or cylinder not breaking the bolts.
gg

[Al_Smith]

Here's another tid bit of threaded fasteners .For threads in steel it takes the diameter of the fastener ,in cast iron about double and aluminum about 4 times of thread engagement to prevent pullout .FWIW I only use a torque wrench for bolted connecting rod caps on old saw .The rest are  "righty tighty " .That stems back decades ago when I failed  to snug up one cap on a Chevy 350 I had rebuilt.However it did run about 3,000 miles before it failed .What a mess that was .Ugh !

[g_man]

Here's another tid bit of threaded fasteners .For threads in steel it takes the diameter of the fastener ,in cast iron about double and aluminum about 4 times of thread engagement to prevent pullout .FWIW I only use a torque wrench for bolted connecting rod caps on old saw .The rest are  "righty tighty " .That stems back decades ago when I failed  to snug up one cap on a Chevy 350 I had rebuilt.However it did run about 3,000 miles before it failed .What a mess that was .Ugh !

That's good to know - Thank you for that tid bit !
gg