Jump to content

600 mi service: cly. head attach bolt tightening


Jerry_75_Guy

Recommended Posts

Ok, after putting 600mi+ on my trusty 2001 RT after replacing the cly. head gasket, Clymer's says 'A. tighten the cly. head attach bolts to 20nm', then, 'B. using a degree wheel, (everything in a crisscross pattern, of course) and tighten an additional 180 degrees'.

 

The bolts were already @ 20nm (or a bit more) according to the torque wrench; so much for item 'A.'

 

I then began to tighten each bolt and additional 180 degrees. After ~ 45degrees they started to feel pretty darn tight, read: I was afraid if I continued to the put in the final 135 degrees, I could very possibly over tighten the nuts and/or shear a bolt end off ( been there!!! , and I'm damned well not gonna go again if I can help it!!!!).

 

So, what to do!? By my lights, I figure the nuts are tightened 'just fine', and it's time to 'button 'er back up' and go for a ride, but I've done more than enough 'assuming' with such things, and wanted to asked the collective wisdom here before proceeding.

 

What say you all?

Link to comment
Ok, after putting 600mi+ on my trusty 2001 RT after replacing the cly. head gasket, Clymer's says 'A. tighten the cly. head attach bolts to 20nm', then, 'B. using a degree wheel, (everything in a crisscross pattern, of course) and tighten an additional 180 degrees'.

 

The bolts were already @ 20nm (or a bit more) according to the torque wrench; so much for item 'A.'

You can't measure the current tightness of bolts properly using a torque wrench. You are supposed to loosen the bolts one at a time, torque them to 20NM then do the 180 degrees, it does feel a bit tight but I've done it a couple of times on my RT without problem.

 

Edit: in fact if the bolts were only at 20nm after the gasket replacement I doubt if your gaskets are any good now, this is a re-torqueing not an initial torqueing, that's probably why they felt so hard to turn!

Link to comment
You can't measure the current tightness of bolts properly using a torque wrench. You are supposed to loosen the bolts one at a time, torque them to 20NM then do the 180 degrees, it does feel a bit tight but I've done it a couple of times on my RT without problem.

 

Edit: in fact if the bolts were only at 20nm after the gasket replacement I doubt if your gaskets are any good now, this is a re-torqueing not an initial torqueing, that's probably why they felt so hard to turn!

 

Thanks Bob; that makes much more sense to me. Clymer's just said 'tighten to 20nm' not 'loosen and retighten to 20nm'; their lack of specificity is irritating for me given my lack of mechanical experience (if I really already knew what the heck I was doing, I wouldn't need the book! ;-)

 

The nuts were pretty tight initially. I did just as you suggested; loosen, tighten to 20nm, then tighten an additional 180 degrees, and it worked just fine.

 

Thanks very much for the quick response!! thumbsup.gif

Link to comment

Archived

This topic is now archived and is closed to further replies.

×
×
  • Create New...