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Tech Forum : Warped Manifold

- BMW E21 Community
   - Tech Forum
      - Warped Manifold
g323   Posted Wednesday, Dec 6th 4:07am [Edit] [Quote] [IMS] [View car]
Member
Post nr. 30
   
California
323i 1982
So I have a warped Manifold, what are my replacement options? should I go stock(expensive and or hard to find) or what else can I do? If i get the manifold off a 325i m20, will it fit 100%?

thanks!


Greg323i   Posted Wednesday, Dec 6th 4:05pm [Edit] [Quote] [IMS] [View car]
Member
Post nr. 268
   
Melbourne, Australia
1982 Hennaröt 323i
Any machine shop worth half a nickel can resurface the mounting flange for not too much money. A friend of mine made up a turbo manifold and the face was warped after he was done. Had it resurfaced for about $20, I think.

imaradiostar   Posted Wednesday, Dec 6th 8:59pm [Edit] [Quote] [IMS] [View car]
Member
Post nr. 963
   
Nashville, TN
81 323i, 82 525i, 85 524td, 90 535i
do you have a decent file?

How warped is it?

jamie

aussie323i   Posted Thursday, Dec 7th 3:08am [Edit] [Quote] [IMS] [View car]
Member
Post nr. 547

australia
1979 323i
When I rebuilt my motor, I had the exhaust manifolds faced at the machinist to make sure I got a 100% seal... was cheap and has never even looked like leaking.

Got it done at the same place as the head.

Cheers

g323   Posted Thursday, Dec 7th 8:17am [Edit] [Quote] [IMS] [View car]
Member
Post nr. 31
   
California
323i 1982
imaradiostar, its warped enough on the connector with the downtube to have a small exaust leak on one side.
(sorry if i cant be more descriptive!)
how could i fix this with a file?
-Grant

sunbeam***   Posted Thursday, Dec 7th 1:48pm [Edit] [Quote] [IMS] [View car]
Member
Post nr. 213
   
wirral UK
1982 323i
g323 wrote:
imaradiostar, its warped enough on the connector with the downtube to have a small exaust leak on one side.


I would say it is more likely to be a distorted downpipe rather than the face on the manifold.
Are you using asembley paste with the gasket or just the gasket on its own?

imaradiostar   Posted Thursday, Dec 7th 4:22pm [Edit] [Quote] [IMS] [View car]
Member
Post nr. 965
   
Nashville, TN
81 323i, 82 525i, 85 524td, 90 535i
yeah, that's a downpipe problem.

Got a pipe wrench?

jamie

g323   Posted Thursday, Dec 7th 6:21pm [Edit] [Quote] [IMS] [View car]
Member
Post nr. 35
   
California
323i 1982
Have a pipe wrench, Just take off a down pipe and bend it?

g323   Posted Thursday, Dec 7th 6:22pm [Edit] [Quote] [IMS] [View car]
Member
Post nr. 36
   
California
323i 1982
just the gasket, i didnt know there was such thing as assembly paste? Kragen part or order?

sunbeam***   Posted Thursday, Dec 7th 9:34pm [Edit] [Quote] [IMS] [View car]
Member
Post nr. 214
   
wirral UK
1982 323i
Assembley paste is a must if you want a true seal.
It's sold in the UK under trade names such as GUM GUM or FIRE PASTE, i wouldnt know what it's called OTP.
When you tighten the nuts on the downpipe/manifold joint you should just nip them all up first then tighten them all 1/2 a turn at a time NOT fully tighten one then then second then the third, you will pull the flange over to one side doing this.

sunbeam***   Posted Thursday, Dec 7th 9:57pm [Edit] [Quote] [IMS] [View car]
Member
Post nr. 215
   
wirral UK
1982 323i
http://www.wurthusa.com/project/en/leftnavi/catalog/product.php?path=04.0190.jpg

here it is on the Wurth website


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