[vc_row element_id=”708892″ css=”.vc_custom_1650334797572{margin-top: 40px !important;}”][vc_column animation_delay=”0″ width=”1/2″ element_id=”540835″ css=”.vc_custom_1650332145384{margin-left: -30px !important;}” crp=”480:i:i,480-768:i:i,768-1024:i:i,1024-1280:i:i,1280-1366:i:i,1366-1600:i:i,1600-1920:i:i”][vc_column_text animation_delay=”0″ css=”.vc_custom_1650332248855{margin-right: 8px !important;margin-left: 8px !important;background-color: #0c73ce !important;background-position: center !important;background-repeat: no-repeat !important;background-size: cover !important;}”]
THE REASON FOR REPLACEMENT THEM
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- Stretch Bolts are used in aluminium Cylinder Heads and always need to be replaced after use.
- The aluminium Cylinder Head will expand up to 4 times more than the older cast iron Cylinder Head. This is due to the high thermo conductive materials used within modern engines.
- The Stretch Bolt is designed to work with the aluminium Cylinder Head unlike the older (re-usable) Bolts.
- After use, Stretch Bolts are weakened and are not strong enough to be used again.
- Please see the diagrams to identifying what happens when Stretch Bolts are re-used.
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1 Stretch Bolt before installation.
2 Threads have become weakened after re-use.
3 Shaft has become weakened after re-use.
[/vc_column_text][/vc_column][vc_column animation_delay=”0″ width=”1/2″ element_id=”47417″ css=”.vc_custom_1650334296828{margin-top: 20px !important;}” crp=”480:i:i,480-768:i:i,768-1024:i:i,1024-1280:i:i,1280-1366:i:i,1366-1600:i:i,1600-1920:i:i”][vc_single_image image=”19056″ img_size=”medium” alignment=”center”][/vc_column][/vc_row][vc_row element_id=”481140″ css=”.vc_custom_1650333813786{margin-top: 30px !important;}”][vc_column animation_delay=”0″ shadow=”true” width=”1/2″ element_id=”128657″ css=”.vc_custom_1650398671423{margin-top: 10px !important;margin-bottom: 10px !important;margin-left: 10px !important;}” crp=”480:i:i,480-768:i:i,768-1024:i:i,1024-1280:i:i,1280-1366:i:i,1366-1600:i:i,1600-1920:i:i”][vc_single_image image=”19055″ img_size=”medium” alignment=”center”][/vc_column][vc_column animation_delay=”0″ width=”1/2″ element_id=”47417″ css=”.vc_custom_1650334296828{margin-top: 20px !important;}” crp=”480:i:i,480-768:i:i,768-1024:i:i,1024-1280:i:i,1280-1366:i:i,1366-1600:i:i,1600-1920:i:i”][/vc_column][/vc_row][vc_row][vc_column][vc_separator border_width=”2″ css=”.vc_custom_1650406468230{margin-top: 40px !important;margin-bottom: 20px !important;}”][/vc_column][/vc_row][vc_row element_id=”334351″ css=”.vc_custom_1650336596022{margin-top: 30px !important;}”][vc_column animation_delay=”0″ width=”1/4″ element_id=”540835″ css=”.vc_custom_1650332145384{margin-left: -30px !important;}” crp=”480:i:i,480-768:i:i,768-1024:i:i,1024-1280:i:i,1280-1366:i:i,1366-1600:i:i,1600-1920:i:i”][vc_column_text animation_delay=”0″ css=”.vc_custom_1650334411287{margin-right: 8px !important;margin-left: 8px !important;background-color: #0c73ce !important;background-position: center !important;background-repeat: no-repeat !important;background-size: cover !important;}”]
THE REMOVAL
[/vc_column_text][/vc_column][vc_column width=”3/4″][/vc_column][/vc_row][vc_row][vc_column animation_delay=”0″ element_id=”91635″ css=”.vc_custom_1650332522154{margin-top: 20px !important;}” crp=”480:i:i,480-768:i:i,768-1024:i:i,1024-1280:i:i,1280-1366:i:i,1366-1600:i:i,1600-1920:i:i”][vc_column_text animation_delay=”0″ css=”.vc_custom_1650334464490{margin-left: -20px !important;}”]When removing, it is essential to follow the sequence and use the correct tool stated by the engine manufacturer in relation to the Bolt head.[/vc_column_text][/vc_column][/vc_row][vc_row element_id=”346330″ css=”.vc_custom_1650334976760{margin-top: 40px !important;}”][vc_column animation_delay=”0″ width=”1/4″ element_id=”540835″ css=”.vc_custom_1650332145384{margin-left: -30px !important;}” crp=”480:i:i,480-768:i:i,768-1024:i:i,1024-1280:i:i,1280-1366:i:i,1366-1600:i:i,1600-1920:i:i”][vc_column_text animation_delay=”0″ css=”.vc_custom_1650334940939{margin-right: 8px !important;margin-left: 8px !important;background-color: #0c73ce !important;background-position: center !important;background-repeat: no-repeat !important;background-size: cover !important;}”]
THE INSTALLATION
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- Ensure the Bolt holes in the Cylinder Block are clear of contamination.
- Bolts are no longer torqued to a pre-set load, a standard torque wrench is only used during pre-loading.
- Use a degree gauge while torqueing.
- After this the Bolts are tightened via degrees of rotation and will not be affected by the friction during loading.
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Check our catalogue of Head Bolts
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