IHADAV8.com - Turbo Buick Tech, and Nonsense

Tech Area => General Buick Tech => Topic started by: Shimy87 on October 19 2015, 07:47:48 PM

Title: exhaust tick
Post by: Shimy87 on October 19 2015, 07:47:48 PM

Back to this one. Seems most like to not use gaskets. What's an effective way to true up manifold surface in a DIY manner?

Title: Re: exhaust tick
Post by: Scoobum on October 19 2015, 08:12:13 PM

Leave the front and rear header bolts in...remove the others. The header gaskets will drop in. Reinstall the bolts and cinch them up via the proper torque sequence.

Title: Re: exhaust tick
Post by: Scoobum on October 19 2015, 08:29:29 PM

Dan and I had a DS header warped to fuck a couple years back. Sent it out to have it machined...and it was still a mess. Our solution was to cut it to relieve the stress. No more leak.

Title: Re: exhaust tick
Post by: gusszgs on October 20 2015, 06:21:23 PM

I had the typical DS header 3-5 crack.....weld ed it up with a gusset for support. Flange got warped during the welding so I took it to a reputable machine/welding shop and they machined it laser straight. No gasket no leaks

Title: Re: exhaust tick
Post by: Shimy87 on October 20 2015, 07:02:37 PM

Tore the bitch apart tonight, drivers side no cracks, no leaks. Had to take the down pipe out to drop out the x over pipe. Found 2 leaks where it connects to the passenger side header. Appears where they flared the header for the joint they left a bit of a ridge and I think that might have caused it? Filed it down to a nice smooth socket again and will put back together tomorrow. Should I use high temp silicone at these joints?