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T77911S's Avatar
 
Join Date: Oct 2006
Location: MYR S.C.
Posts: 10,156
intake flange pitted.

i pulled the intake off yesterday to check/fix an air leak in #3 and maybe #2.
the surface of the intake manifold that goes to the injector blocks looks to have pitts. not real big pitts, but pitts.
could this cause air leaks?
how could i fix it?
i thought about cleaning it then putting a thin coat of JB weld on it then filing/sanding it down to fill the pits.
what about a gasket sealer?

the injector blocks are new and look good(should have just bought aluminum ones). except, the blocks are deformed where the intake gasket holes are too big for the ports. this could be why my bolts kept coming lose. the gaskets were being compressed into the blocks.
if the gaskets actually fit the ports, i think that would fix a lot of the blocks cracking. that is actuallly where i noticed small cracks on the old ones, around the inside where there blcoks were deformed.

i have a large thick peice off glass. i was thinking about putting some 400 gritt paper on there and trying to make sure the intake ports where all flat. No?
there was/is a machine shop here in town that basically did the same thing with the head from my mazda. he put it on a large sander to flatten it. i was NOT happy. i did not find out until i got it back and was looking at the surface and saw the sanding marks.
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86 930 42kmiles [__] RUNNING:[__] NOT RUNNING: ____77 911S widebody: SOLD
88 BMW 325is 200K+ SOLD
05 BMW 330CI 130K:: [__] RUNNING: [__] NOT RUNNING:
08 VOLVO V70 190K:: [__] RUNNING: [__] NOT RUNNING:
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Old 02-03-2014, 02:49 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #1 (permalink)
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i had it powder coasted, i bet it was done when they sandblasted it.
__________________
86 930 42kmiles [__] RUNNING:[__] NOT RUNNING: ____77 911S widebody: SOLD
88 BMW 325is 200K+ SOLD
05 BMW 330CI 130K:: [__] RUNNING: [__] NOT RUNNING:
08 VOLVO V70 190K:: [__] RUNNING: [__] NOT RUNNING:
90 B2200[__] RUNNING:[] NOT RUNNING:__2000 MER E320 WAGON [] WRECKED:[]RUNNING:
Old 02-03-2014, 06:37 AM
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Join Date: Mar 2005
Location: Phoenix, AZ
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If you are concerned, and your engine is assembled, apply a little Loctite 574 to your gasket.

If the engine is apart, you could stick for 600-grit paper down on a true surface (ex: granite block), lightly oil it and rub the parts gently in a figure-8 pattern to smooth them down.
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Old 02-03-2014, 08:31 AM
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its together.

someone else suggested copper gasket sealer. i was thinking maybe just on the manifold side.
__________________
86 930 42kmiles [__] RUNNING:[__] NOT RUNNING: ____77 911S widebody: SOLD
88 BMW 325is 200K+ SOLD
05 BMW 330CI 130K:: [__] RUNNING: [__] NOT RUNNING:
08 VOLVO V70 190K:: [__] RUNNING: [__] NOT RUNNING:
90 B2200[__] RUNNING:[] NOT RUNNING:__2000 MER E320 WAGON [] WRECKED:[]RUNNING:
Old 02-04-2014, 03:48 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #4 (permalink)
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