Yes. The stock ones stretch and cannot be reused . as answered above, factory head bolts are what are known as tq to yeild bolts... meaning you are actually stretching the bolt inside the thread bore to make sure they are extremely snug.
Is it OK to reuse head bolts?
Can I reuse head bolts? ... A head bolt should not be reused if the threads are galled or badly damaged . Chasing damaged head bolt threads with a die will clean up the threads but also remove material (metal) and undermine the head bolt’s ability to torque down and hold to specs.
Can you reuse head bolts Honda?
The stock ones stretch and cannot be reused . as answered above, factory head bolts are what are known as tq to yeild bolts... meaning you are actually stretching the bolt inside the thread bore to make sure they are extremely snug.
Are Honda head bolts torque to yield?
Yes – those are also called ‘Torque To Yield,’ or TTY. Meaning that they have been engineered to stretch once they exceed the intended torsion value after installation, rather than breaking or holding fast for other potential engine damage during an over-pressure situation.
Can you reuse a Honda head gasket?
Yeah, but these gaskets where actually MADE to be re-used. Honda even re-uses them .
Should head bolts be oiled?
As a rule, the threads and underside of the head on most standard automotive head bolts should be lubricated with motor oil before the bolts are installed . The torque values specified by the engine manufacturer are typically based on oiled threads and fasteners – not dry fasteners.
Do I have to replace head bolts when replacing head gasket?
A poorly installed gasket leaks and can damage other engine components. All in all, it’s often best to install new head bolts when you work on your cylinder head or head gasket , unless you can be absolutely sure the age and condition of your current ones. It will save you headaches and cash in the future.
Can you reuse b18 head bolts?
Re-used the head bolts, no problems. As long as you don’t over tourqe them you should be fine .
Can torque to yield bolts be reused?
These bolts cannot and should not be reused due to the stress caused to the bolt during its first installation. It is important to be aware that these bolts will not have the same clamping strength if attempted to be used a second time. Torque-to-yield bolts may break if reused or become loose over time.
Why do head bolts break?
Fatigue failure happens when the bolts have not been tightened properly, or have loosened up during its service life. If enough force is acting on the loosened joint during use of the product, bending stresses can weaken the fastener, eventually causing it to fail.
Should I use anti seize on head bolts?
There is one time you should always use anti-seize when torquing cylinder head bolts: when it’s a diesel engine. As a rule, you need to chase both the male and female threads and use anti-seize on diesel engines .
Do head bolts need washers?
Well, yes. Without washers , you won’t get the correct bolt tension. That is because some of the torque that you apply just goes into galling the head, rather than tensioning the bolt. Without sufficient bolt tension, your gasket will blow out.
What happens if you over tighten head bolts?
When you overtorque above 15% of recommended which in this case would be about 95 ft/lbs you basically turn the fastener into a rubber band . Some of the fasteners will stretch and you will have uneven torque. Add heat and pressure and head gasket blows and the head can even warp.
What happens if head bolts are not tight enough?
But even the best head gasket won’t maintain a tight seal if the head bolts have not been properly torqued. ... Uneven loading created by unevenly tightened head bolts can distort the head . Over a period of time, this may cause the head to take a permanent set.
How long will new head gaskets last?
Head gaskets typically last 200,000 miles , which is considered about the lifetime of most cars. That means, if you look after your car and follow the service schedule, you should never be faced with a blown head gasket.
