I'm doing the upper intake manifold replacement (was using and leaking coolant) and decided to go ahead and replace the Lower Intake Manifold gaskets as well, since its so fun!

My question is the whether to use a sealant on the two rubber seals (approx. 6" long, 1/2" wide) that go on each end under the intake manifold. Shoud I use a sealant (like hi-temp silicone) on these? If so, how much?

I appreciate any tips and advice.

thanks,
Phil

Ultra Copper RTV in the corners only


don't mind the blue stuff that I used.

Welcome to Bonneville Club, Phil. I hope those are the aluminum frame LIM gaskets. Anyway, after you place the seals on the rails, apply just a dab of rtv silicone to the joint where the side rail meets the gasket that has been installed against the cylinder head.

Edit: Geez, that Harofreak is so quick! You may want to read this Techinfo article about this repair if you have not already: http://www.bonnevilleclub.com/forum/...e=article&k=38

If you have Dex, drain it and flush the system. Refill with "mixes with any type or color" coolant using this procedure: http://www.bonnevilleclub.com/forum/...=article&k=100

Wow, nice pix. Thanks for the help and quick response harofreak!

I'll finish her up tomorrow.

Phil

Also, thanks Bill. Yep, after reading here a bit I decided to get the the alum. frame gaskets.

thanks folks!

You're welcome. However, like Bill stated, you really need to be using the Aluminum framed LIM gaskets.


GM Aluminum Frame Lower Intake Manifold Gasket set: GM PN# 89017816

EDIT.... good you got them!

And follow up with the DEX (or not):

http://www.zillamotorsports.com/DEX

Not. No Dex for me, thank you very much!

Bill, I am trying to track dwon these articles, I need the info to fix my 96 SE.
Whan I click on the links they don't work.

I would really appreciate the help.
Regards,
James

When we changed the system a lot of the links stopped working. It'* being worked on. What do you need, perhaps we can get some new links for you or just answer your questions.

Dan, Thanks for the note, I am getting ready to fix my 96 Bonneville. I have a the parts and I just need more detailed instructions. I subscribed to Alldata and there instructions are not very clear.
I was hoping to read the articles referenced above.
Regards,
James McMurrray