How do you know what kind to use? Red, Blue, Green?
For example: To day i pulled the cam shaft off the head to try and angle it at 45 deg to get the cam shaft socket on.

Now I have to torc bearing cap's back on.

FSM says :"(d) Install the correct numbered bearing cap on each
journal with the arrows pointing toward the front.
Torque each bolt.
Torque: 20 N–m (200kgf.–cm, 14ft–lbf)"

Does not say anything about loctite. But that book is made for real mechanics not some guy trying to figure it out as he goes.

So I'm going to use Loctite Red (High Strength) Or Blue Med Strength ( I just don't know yet. ) to make sure the bearing cap's don't come loose.

Where would I learn when and what type of Loctite to use?

 

If the cap bolts are torqued to spec they will not come loose. No loctite needed.

Make sure the holes are not full of oil!!

That being said, I do use thread locking fluids on some things from time to time.

To work well, the parts need to be degreased with acetone or similar solvent.

Loctite has a product selection area on their website.

I only use the red when setting bearings in pockets or on shafts where the press fit is weak and similar apps. There is a primer that is used to give max strength.

Looking at their website, there are other products they reccomend for retaining press fits, but the red threadlocker has worked well for the uses I have put it to.

The blue is generally good for most bolt locking needs.

 

I can`t recall ever using locktite on any engine bolts

 

I use blue locktite for several bolts that may need to be removed in the future such as flywheel bolts.

If you are going to use red locktite, I would consider that that same as welding something together and with no intentions of ever removing it again. You will see it mentioned in several places that it can take heat to weaken the red locktite to remove a bolt.

 

I use blue Loctite on almost anything, but red Loctite is not something to mess with!