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Old 04-16-2005, 07:12 AM   #1
Wylde Horses
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Member#: 61255
Join Date: May 2004
Chapter/Region: VIC
Location: Port Coquitlam, BC
Vehicle:
2002 WRX
dirty silver

Default How do you recommend I deal with shrinkage...

...of my crucial racing copper exhaust gaskets? (And get your minds out of the gutter )

I just started working on installing my uppipe/downpipe tonight - the stock DP is ready to come out, all the bolts are loose, and it's just the turbo side of the UP that still needs to be unbolted. In the other thread about copper gasket shrinkage, someone recommended that the car be heat cycled after the gaskets have been installed, the retorque all the bolts. I'm just wondering if there is a fast and dirty way to do this? Right now I'm thinking I'll have to install the uppipe first, put the exhaust together, less the heatshields, toss the IC and airbox back in, run the car for a while, then take it all apart again to tighten up the UP bolts, then possibley heat cycle them one additional time and again resnug the bolts. Then do the same with the DP. It just seems really involved - I'll be pulling the IC out 4 more times (twice for the UP, twice for the DP). I'm assuming the car can't run without the MAF, even though it has an air pressure sensor as well, otherwise I would leave the airbox and IC off, and just run the engine sucking air through the TB...

Any tips that will speed up the process will be appreciated. And lets please not make this thread a copper vs. OEM debate, it doesn't matter which one you think is better, I'm dealing with the copper gaskets.
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Old 04-16-2005, 07:16 AM   #2
Uncle Scotty
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we have an Uncle

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Pick another day----in a week or so.....and just deal with it....if you notch the lower heatshield so you can just unbolt it without ******* with the o2 sensor, your life will be MUCH easier....and the upper HS just needs the 2 bolts that bolt to the bracket that bolts to the 2 turbo-DP bolts...no huhu.
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Old 04-16-2005, 08:32 AM   #3
hotrod
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Join Date: Jan 2002
Location: 13.239@102.85 @ 5800 ft on 13T
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2002 Impreza WRX

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I'd recommend you torque up the gaskets as instructed by Crucial Racing, and let things set for a while, ( like go grab a sandwich or change the oil etc. ), come back and re-check the torque. Put things back on, so you can fire the engine, and start it up, and drive the car around the block a couple of times. Then let it cool a while, then take it out for another short drive --- a couple miles out and back.

Let it cool enough to work on it and then do the final torque. I usually work this sort of things around a couple simple errands I have to do anyway, so the heat cycles are not wasted time. A run to the grocery store, or a trip to the gas station is all it takes to get the exhaust system up to full temp.

That way you only have to do it once, but the gasket see's 2 heat cycles.

If you plan it so you do the first heat cycle in the evening let the car cool over night and then do the second drive first thing in the morning that would be ideal.

It all depends on how rushed for time you are.

Then Like Scotty says slide under the car in a day or two and check a couple of the bolts that are easiest to reach. If they are still tight your probably good. If they are a bit loose you know you need to drop the heat shields and double check things.

Larry
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Old 04-16-2005, 11:19 AM   #4
hondaeater69
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How do you recommend I deal with shrinkage...


Stay out of the water!
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Old 04-16-2005, 12:40 PM   #5
Boonie
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Join Date: Sep 2004
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2005 WRX
WRB

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FYI there is no need to take the MAF and Airbox out in order to do this. You are snugging bolts that re nowhere near these pieces. I didn't even take mine out to install my dp and up. That will save ya at least 15 minutes roundtrip.

If I were you I would just torque all the bolts down real nice and snug, then run it for about 50 miles, then take off your intercooler and check to see if the bolts are still as tight. If the ones in front that are easy to access are still tight, chances are they will all be tight. That will save you alot of time. Also make sure you trim up the Heatshield on the manifold so you don't have take out the O2 sensor to get that off. Will save ya some time!
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Old 04-16-2005, 12:47 PM   #6
blackie
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blizzzack stage IV

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