01-18-2022, 10:13 AM | #1 |
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Downpipe install tips?
About to install ER catted DP on 16 340i xdrive
2 real thick spacers and 10 thinner ones came with unit I heard some need them on xdrive model and some don’t end up using them? When needed, apparently they go with the metal pan that surrounds DP? No indication of anything with pamphlet that comes with DP Also air box removal and lowering of back end of exhaust onto brace a necessity??? Trying to be proactive for the unforeseen so I bought OEM DP gasket AND an OEM V Band clamp. I’m wondering if I should also pick up an OEM mid pipe clamp as well? What do you think? I’ve seen a few people say they couldn’t get the mid pipe clamp off. Maybe nut melted onto bolt or something...... If I don’t need any of these OEM parts the dealer said I can return for refund as long as it’s unopened.... Car has 37k miles so I’m hoping it’s not high mileage enough to where all the above mentioned components would have to be used |
01-18-2022, 10:32 AM | #2 | |
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You could install DP without removing airbox and lowering end of exhaust but it will add probably more time to your install than if you just took airbox and lowered exhaust. I think exhaust only has 2 connections to lower it. Those spacers I don’t know much about. That’s a crapshoot I guess...don’t know |
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01-18-2022, 10:57 AM | #3 |
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Yes the air box will need to come out, just pull up. The midpipe clamp is welded on the exhaust, you can't/shouldn't need to replace it. Yes you must remove the exhaust brace to lower the rear section. You will need penetrating oil like PB Blaster to get the DP to exhaust separated easier. You will need a pipe expander to get the new DP in the exhaust. Did the new V band come with a new bolt? The bolt is what people have to cut as a worst case if it doesn't come off. I can't answer about the spacers/washers as I have red and didn't need any.
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01-18-2022, 11:18 AM | #4 | |
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I heard though that some didn’t need a pipe expander. I guess it depends on if the current clamp has squeezed it and pipe got crushed in a little? |
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01-18-2022, 12:00 PM | #5 |
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No way mine was going on without the pipe expander. Get a loan-a-tool from Autozone or Advance.. It's free, they just require a deposit.
V-band is hit or miss.. may need may not. Airbox removal is a must. Dropping the rear exhaust is a must if you are doing this in your driveway. I did, had to drop it. If you have a lift you may be able to skip dropping rear exhaust. |
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01-18-2022, 12:46 PM | #6 | |
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01-18-2022, 03:54 PM | #8 |
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01-19-2022, 08:45 AM | #10 |
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01-19-2022, 11:56 AM | #11 |
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So I was told by ER that the spacers are for the ‘metal skid plate on bottom of car to bring it down a little to make room for DP’
I just don’t recall reading about anyone who put this DP or any other DP into an xdrive f30 that used spacers. Perhaps if you don’t get the fitment quite right you would need them? Idk.... |
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01-21-2022, 10:30 PM | #12 |
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I put the ER catted DP on my 340 xdrive, and didn't use any spacers. I was able to re-use the gasket and both clamps.
I wouldn't bother getting a new midpipe clamp. That's a pretty wide and robust unit. But as others said, get the expander. I bought a cheapo unit from Amazon to help spread the pipe. I also found that once the DP was loose from the turbo, twisting it back and forth did help spread that mid-pipe opening. |
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