2nd Generation Specific (1986-1992) 1986-1992 Discussion including performance modifications and technical support sections.

Anyone replaced a bottom intake manifold gasket?

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Old Dec 18, 2001 | 06:06 PM
  #1  
ItsNiceToBurnRice's Avatar
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From: Tampa, FL
Anyone replaced a bottom intake manifold gasket?

Just got my car back from the dealer, it wouldnt idle because the gasket is blown. They want $761 to fixit. **** that, i ordered it for 21 bucks. I kow there is a lot involved but i know i can handle it. how hard is it, and Ive been drivig my car for a while like this, could i harm it by doin this at all? thanks
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Old Dec 18, 2001 | 10:59 PM
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mazdaspeed7's Avatar
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From: Savannah, GA
Its not too bad. Just make sure you mark the vacuum lines, and there they go, such as numbering them. Most of the electrical connecters are idiot "resistant". Be sure to theres no pressure in your fuel line when you pull the secondary rail off, or youll make a mess. Do yourself a favor, and buy some o-rings for the injectors BEFORE you start. I think Ive torn one o-ring every time I have removed the injectors. Now I have a bag of 20 Other than that, its pretty straight forward.

You might want to arrange a back-up form of transportation if need a car on a dialy basis. It will probably take you a full day at least. Its not too complicated, as long as youre methodical about it, and mark things so you know where to put them when you start putting it back together. it is a very time consuming process though.
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Old Dec 19, 2001 | 09:29 AM
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From: Toronto, Ontario, Canada
mainfold gasket

It is a "do it yourself" project for certain

I used the Haynes manual when I did mine. It was detailed enough. Mark all your vaccum lines like the other person mentioned. Torque the manifold to engine block bolts to the correct tightness. I overtightened mine and broke one or 2 off and had to get new studs. Make sure you get the metal gasket rather than the cork. It will last longer and is more reliable. Clean out the dirt/carbon from your intake and throttle parts while you have it on the work bench. Again, take your time and make sure you number all the vaccum lines or it will be a pain to figure out how they were. It took me 6 hours to do it. Hey, I am an accountant...not a mechanic...

Good luck.
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Old Dec 19, 2001 | 11:19 AM
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From: louisville, KY
That's next for me.. I have the manifolds off, and the new gaskets all ready.. Just waiting for my fuel pump to pressure test it before I start bolting stuff on..

However, I am an idiot, and i didn't separate/label which bolt goes where. I'm not so worried about the vaccuum lines, as I have my 88 to compare everything too.. But the bolts! Oh, lord, it's going to suck.

-Tesla
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