Intake manifold studs

[guzzifan]

Does one use locktite on intake manifold studs…and if so, blue or red? 

I’m installing some step-down studs (6mm to 8 mm) to adapt 36’s to some 850-T heads and since the holes are open at the back I need to lock them in place at the right depth.  Alternately, I suppose I could use locktite on the acorn nuts on the carb side and antiseize on the stud that goes into the head, but that just does not sound like the right choice.  I’d rather lock the stud in place and save the aluminum head holes the wear associated with removal/ replacement of the stud as future maintenance requires.

Thanks.

[lucian]

Red high temp locktight would be my choice.

[73 sport]

   If you ever want to change or adjust the studs, use Blue Loctite, its' removable.  If you want permanent installation, use Red. To remove fixtures with Red Loctite , you will need to heat the stud and base metal with a torch to weaken the Loctite for removal. Blue will usually cover all retention requirements. Read the spec sheets and characteristics of the various grades.

[guzziownr]

My '75 Eldo Bitza has 36 MM Dellortos on a '79 SP head. I didn't have a lot of luck with the stepdown studs.

I used an intake manifold from MG Cycle and a set of 8 mm Cheesehead screws.

I turned down the heads of the screws a bit to get clearance.

[guzzifan]

Guzziownr…what was the difficulty you experienced with the step down studs?

[Turin]

I didn't use any lock tite when installing my ace hardware step studs. I also uded lock nuts. Uverything is still good years later.

[lucky phil]

My '75 Eldo Bitza has 36 MM Dellortos on a '79 SP head. I didn't have a lot of luck with the stepdown studs.

I used an intake manifold from MG Cycle and a set of 8 mm Cheesehead screws.

I turned down the heads of the screws a bit to get clearance.

Eeek, straight slotted screws holding the inlet manifolds on! I don't even use them on lawnmower repairs. I'm not even going to mention the squidgy red silicon gaskets oozing out from under the rocker covers, no siree, not saying a word about them.

Phil 

[Chuck in Indiana]

Eeek, straight slotted screws holding the inlet manifolds on! I don't even use them on lawnmower repairs. I'm not even going to mention the squidgy red silicon gaskets oozing out from under the rocker covers, no siree, not saying a word about them.

Phil

Shirley  those are silicone gaskets?

[lucky phil]

Shirley  those are silicone gaskets?

I assumed they were those horrid sheet silicon gaskets someone makes in the states I think as a replacement for the std gasket.

Phil

[centauro]

I didn't use any lock tite when installing my ace hardware step studs. I also uded lock nuts. Uverything is still good years later.

Step studs from ACE hardware are a good way to install the Delrin manifolds. I did that same job on my SP years ago.
But a couple of cautions are in order:

1. Those studs tend not to be threaded exactly the same, so it is important to look at each one before buying to ensure they are threaded completely on both ends;

2. The brass inserts on the manifolds sometimes fall off and get lost; they need to be installed in the manifold holes to prevent cracking when you apply torque to the nuts. In my case, I used lock washers under the nuts and did not bother with locktiting the head side of the studs. Other than that, no problems.