Thread sealant

[mrlaser]

I am about to replace the original cast iron heads on an 8ba V8. I have a question regarding which thread sealant to use. I have both of the pictured products on hand. I also have read some of the prior posts on thread sealants. I am not necessarily asking which is the superior product, I am only inquiring whether both are satisfactory for this use. Thanks for any input.

 

[36rgtop]

I have primarily used the #2 non-hardening the other has teflon in it but either one will be satisfactory.

 

[marko39]

Along with applying to the bolts I also smear the threads in the block as much of the sealant from the bolts will be left on top of the block when you screw them in.

 

[19Fordy]

This works great also for head bolt and studs threads.

 

[mrlaser]

Thank you for your responses.

 

[flatjack9]

I use the pipe thread sealant in all my builds. Probably 30 - 40 engines with no problems.

 

[Bored&Stroked]

Me, I'd use the thread sealant with PTFE. Also, put a good amount of anti-seize on the sides of the bolts and a little bit of moly-lube/grease under the heads to help with more accurate torque readings.

Also, no matter which sealer you use - let the engine sit for at least a day before you fire it up . . . helps stuff harden a bit.

 

[mrlaser]

Thanks again for all the input.

 

[Ford Freak]

Thread sealant for me .......