Hi,

Installing  a new cylinder head.  

This is my first experience with Torque (and) Angle.

 

 

Manual says: Step 1: Torque to 50LBS

                      Step 2: Turn additional 90 -100 degrees

 

I have a TA360 angle gauge for Step 2.

 

 

Question: After taking each bolt to 50FtLb's per tightening sequence diagram, do I go back and recheck each bolt to insure its at 50FtLb - BEFORE - proceeding with STEP 2?  

 

Thanks.

 

Leaky

I would for peace of mind,  but I dont know if that is actually need.  It can't hurt.

All the cylinder head bolt torque specs I work with are similar to what you have, tighten to X number of ft-lbs then angle torque so many degrees.  I never go back and recheck.

On 2/4/2018 at 10:10 PM, Leaky88 said:

Hi,

Installing  a new cylinder head.  

This is my first experience with Torque (and) Angle.

 

 

Manual says: Step 1: Torque to 50LBS

                      Step 2: Turn additional 90 -100 degrees

 

I have a TA360 angle gauge for Step 2.

 

 

Question: After taking each bolt to 50FtLb's per tightening sequence diagram, do I go back and recheck each bolt to insure its at 50FtLb - BEFORE - proceeding with STEP 2?  

 

Thanks.

 

Leaky

In theory you should go back and check for the 50lbft BUT  if the fastener torque was dry and not lubed and by that I don't just mean the threads I also mean under the head/washer then you won't really see any movement as dry it would take more torque to start the fastener moving again than the compression of the gasket from the first to the last if that makes sense, also a lot of torque wrenches aren't that good at a pound or 2, another thing to remember is the length of the  cylinder head and the circle of the bore and fastener spacing, the longer the head   the bigger the difference between 1st  bolt and last,  how far to the next fastener is down to bore size and fastener spacing better way is to do the 50ftlbs in several increments, say 20/15/15, that way it's a much lower number to be out and you'd only ever be a small % of 15 out, large cummins and cat advise this and to wait a little inbetween as heads can be 5ft plus easy