XJ650 Maxim Intake Manifold Replacement

Alright, after owning my '81 Yamaha Maxim XJ650 for 8 years I'm finally able to work on replacing the intake manifolds. I have new manifolds and bolts, but was going to buy some high performance gasket material to make my own gaskets. If you guys have recommendations on type and thickness I'd really appreciate the recommendation!

So, for the last couple of days I have been periodically been spraying aero kroil on the 8 bolts securing the manifolds to the engine in the hopes that I will not encounter any issues as other have with seized bolts. I'm planning on using an impact driver to knock them loose. I should be starting the process soon and intend to take photos and post a full work-through once i'm finished so others will benefit. I've done a lot of reading on the site about this process, but is there any good advice you guys can offer me as I move forward on this process?

Thanks in advance!

 

Maybe try warming the engine up prior to trying to loosen the bolts?

My 81's bolts on the intake manifolds were all loose when I tackled the job this spring . . . guess I was lucky. Figure they were never touched and the gaskets deteriorating created a looseness.

As far as gasket material, I went with the high performance ones from Len.
There are others here who could probably give you good recommendations on thickness and material to make your own.

Good luck!

 

Whatever tool you use make sure it stays straight in the head of the bolt. Imo the easiest way to snap one is to use a tool that is angled in the head trying to break it loose.

Gary

 

i got 7 out of 8 loose and changed the gasket on those, cut from a cereal box with copper hi-temp silicone goo.
that last screw just didn't feel right and i quit while i was ahead. if the motor is out of the bike you can drill a small hole to intersect with the other end of some of the screws and kroil them from the back side.
if the little voice in your head says "don't press your luck"....listen to it