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| Intake/exhaust manifold. Getting a perfect seal, how? https://www.slantsix.org/forum/viewtopic.php?t=23226 |
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| Author: | sturdygertie [ Thu May 17, 2007 7:50 pm ] |
| Post subject: | Intake/exhaust manifold. Getting a perfect seal, how? |
Hey fellas, 65 valiant v-200 in SF. Thanks for having me. Wouldn't you know it, my exhaust manifold has a crack all the way through and around exhaust port three, bummer. Good News, found a "new" one with the intake and everything from a clean seventies slightly more modern S/6. Should bolt up, right? I've done this job before when i had a "vacuum leak". I didn't do a very good job that time cause it was still leaking when i finished like a million hours later and wound up paying my local guy to do it again. This time i'm arming myself with knowledge and thought i'd visit the forum and see if the mighty hammer wielding men on the mystical mountain of six can tell me what the secret is. What's the SUREFIRE way to get this S/6 Intake/Exhaust installed correctly and vacuum leak free. ? thanks guys, any help would be greatly appreciated, she's my daily driver. jon- |
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| Author: | 4x4slantsix [ Thu May 17, 2007 7:58 pm ] |
| Post subject: | |
Came here for similar reasons as you... the tricks that make the six unbeatable! See this thread for gaskets: http://www.slantsix.org/forum/viewtopic.php?t=21864 |
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| Author: | newport77 [ Thu May 17, 2007 8:48 pm ] |
| Post subject: | |
Just make sure to leave the three bolts that hold the exhaust manifold to the intake manifold LOOSE when you're tightening the two manifolds to the engine. Tighten to 10 inch pounds, in the sequence shown in the service manual. Tighten the three in take to exhaust manifold bolts LAST. Then you won't have any leaks. |
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| Author: | sturdygertie [ Thu May 17, 2007 9:14 pm ] |
| Post subject: | did it work well for you? |
thanks for the info, my intake and exhaust are still together and i'm not touching that can of worms i just want to get the face re-surfaced and put it on my car. question: do these aussie gaskets require any silicone for bolting up to the head or do they run dry? how many pounds of torque and a tightening sequence would be good to know too. if anyone wants to chime in. i'll get this thing right, i'm on a mission to do it once i repeat once i repeat once....har d har. |
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| Author: | SlantSixDan [ Thu May 17, 2007 9:34 pm ] |
| Post subject: | |
Use the Australian gaskets without any goop. DO replace the gasket that goes between the intake and the exhaust (with the good Aussie one), or you will very likely find you've got a leak at that location. |
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| Author: | AnotherSix [ Fri May 18, 2007 9:09 am ] |
| Post subject: | |
Those are really nice gaskets and they get them to you quickly. I ordered a few of each. The price is right too. No matter how good the gaskets, everything should be nice and true. If it is not take the extra time and effort to get things surfaced. Also a good cleaning with something like acetone or brake cleaner to remove any grease or oil helps even with a graphite gasket. Some extra time during assembly goes a long way towards not having to do it again. |
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| Author: | Doc [ Fri May 18, 2007 9:24 am ] |
| Post subject: | |
Have you read the article on manifold installation? http://www.slantsix.org/articles/manifo ... unting.htm The key to success is resurfacing and careful manifold alignment. I use a Petersen "model 50" resurfacer to get all the surfaces clean and flat. I am in the South Bay Area so I could get your manifolds resurfaced if needed. DD 
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| Author: | sturdygertie [ Fri May 18, 2007 11:47 am ] |
| Post subject: | Thanks Doug |
Thank You Very Much Doug. I'll see if Common's in SSF has that machine. If not, how much do you charge for this service or would you be farming it out? I'm on a tight budget right now, even the gas from San Francisco is more than i can really afford, but will drive if there's no other option. How much do you charge for this service? I've just ordered my gaskets from AU. can't wait to use this new technology. VRROOOMMMM. jon |
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| Author: | Doc [ Fri May 18, 2007 1:07 pm ] |
| Post subject: | |
$40.00 to resurface a set of manifolds that are ready to go. A little extra if I have to change gaskets, remove broken bolts, etc. DD |
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| Author: | oldgoat83 [ Fri May 18, 2007 4:02 pm ] |
| Post subject: | |
OK, I'm a little confused about the sequence to all this work. Do you surface the two manifolds first, then mount them to the head and then tighten the bolts? Or would you mock it up it get a good seal on the intake to exhaust, then resurface them bolted together and finally reassemble the whole thing? |
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| Author: | sturdygertie [ Fri May 18, 2007 7:20 pm ] |
| Post subject: | |
From what i can tell and i'm no expert, you resurface them together as one unit and then back off on the three bolts at the hot box till it's loose but not falling apart, mount the whole assy to the head, once the nuts are all torqued properly to the head, you tighten the three bolts holding the hot box together. Doug, is that right?? |
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