Exhaust manifold gasket, Do they need to be annealed when new? |
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Exhaust manifold gasket, Do they need to be annealed when new? |
HansJan |
Feb 8 2020, 12:08 AM
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#1
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Member Group: Members Posts: 394 Joined: 5-April 16 From: Sugar Land TX Member No.: 19,860 Region Association: Southwest Region |
Car didn’t pass inspection because of an exhaust leak.
So... Just ordered some manifold gaskets from Pelican Parts. Question is. Is this copper soft out of the box, or does it need to be annealed before install? Thanks for sharing your experiences. |
PlaysWithCars |
Feb 8 2020, 12:27 AM
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#2
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Senior Member Group: Members Posts: 521 Joined: 9-November 03 From: Southeast of Seattle Member No.: 1,323 Region Association: Pacific Northwest |
I've never had to do any prep to the gaskets. Just put them in. Check the head surface to make sure its clean doesn't have any erosion, and you can run a flat file over the ends of the exhaust to make sure they're flat before bolting them up.
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Mikey914 |
Feb 8 2020, 12:51 AM
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#3
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The rubber man Group: Members Posts: 12,638 Joined: 27-December 04 From: Hillsboro, OR Member No.: 3,348 Region Association: None |
I do and haven’t had an issue.
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Wyvern |
Feb 8 2020, 08:46 AM
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#4
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Member Group: Members Posts: 324 Joined: 7-October 15 From: San Francisco (East Bay) Member No.: 19,245 Region Association: Northern California |
Perhaps not ... but it sure would never hurt.
The gaskets are press stamped from cold rolled copper. As mentioned put a long file along the mating surfaces so that the 2 ports are level and flush. Use a torch and get them red hot. The difference is significant. |
brant |
Feb 8 2020, 09:50 AM
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#5
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914 Wizard Group: Members Posts: 11,603 Joined: 30-December 02 From: Colorado Member No.: 47 Region Association: Rocky Mountains |
I’ve had brand new ones leak
With annealing I’ve never had a leak Make sure you run a fine on the mounting face before installing |
dr914@autoatlanta.com |
Feb 8 2020, 09:53 AM
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#6
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914 Guru Group: Members Posts: 7,811 Joined: 3-January 07 From: atlanta georgia Member No.: 7,418 Region Association: None |
install as is just make sure that the top of the heat exchanger flanges are perfectly smooth, dress them together at the same time with a flat file. You can put them up there with a bit of copper paste to hold them in and then torque in an x pattern mating one heat exchanger at a time. Make sure that the muffler bracket is firmly attached
Car didn’t pass inspection because of an exhaust leak. So... Just ordered some manifold gaskets from Pelican Parts. Question is. Is this copper soft out of the box, or does it need to be annealed before install? Thanks for sharing your experiences. |
Olympic 914 |
Feb 8 2020, 10:39 AM
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#7
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Group: Members Posts: 1,661 Joined: 7-July 11 From: Pittsburgh PA Member No.: 13,287 Region Association: North East States |
install as is just make sure that the top of the heat exchanger flanges are perfectly smooth, dress them together at the same time with a flat file. You can put them up there with a bit of copper paste to hold them in and then torque in an x pattern mating one heat exchanger at a time. Make sure that the muffler bracket is firmly attached Different technique, I prefer to attach the muffler bracket finger tight. then tighten the HEs to the head. this allows the other end of the HE to find its own place with the muffler and muffler bracket. JMHO. |
HansJan |
Feb 8 2020, 11:53 AM
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#8
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Member Group: Members Posts: 394 Joined: 5-April 16 From: Sugar Land TX Member No.: 19,860 Region Association: Southwest Region |
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HansJan |
Feb 13 2020, 07:32 PM
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#9
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Member Group: Members Posts: 394 Joined: 5-April 16 From: Sugar Land TX Member No.: 19,860 Region Association: Southwest Region |
Did anneal the gaskets.
It makes a huge difference. Not sure why not everyone is doing this. After fixing the leak on the driver side a leak appeared on the passenger side. To find out that the threats were stripped. In one spot the PO had installed an Allenbolt instead of the stud. This bolt engaged no more then 1/4”. A Helicoil tool is on order to correct this problem. Question: can I expect this Helicoil to take the torque needed to seal the exhaust manifold? Just asking because the Helicoils are not as long as the original threaded hole. Lots of threads here showing people doing this repair, just didn’t find the confirmation that it’s strong enough. |
TheCabinetmaker |
Feb 14 2020, 08:52 AM
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#10
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I drive my car everyday Group: Members Posts: 8,300 Joined: 8-May 03 From: Tulsa, Ok. Member No.: 666 |
Helicoil won't hold. You need a timecert. Install once and done.
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Mark Henry |
Feb 14 2020, 09:49 AM
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#11
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that's what I do! Group: Members Posts: 20,065 Joined: 27-December 02 From: Port Hope, Ontario Member No.: 26 Region Association: Canada |
Helicoil won't hold. You need a timecert. Install once and done. (IMG:style_emoticons/default/agree.gif) I use timeserts for M8 and up, I only use helicoils for M6. There used to be M8/M9 step studs but are hard to find now, even though they're standard equipment on new AMC heads. |
GregAmy |
Feb 23 2020, 04:49 PM
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#12
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Advanced Member Group: Members Posts: 2,264 Joined: 22-February 13 From: Middletown CT Member No.: 15,565 Region Association: North East States |
Such an asy question...and dueling opinions.
I came here to get this same question answered. And I'm leaving even more confused. Manifolds are planed flat so maybe that'll cover it. |
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