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Other maintenance to do while subframe is dropped?
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02-20-2020, 06:34 AM | #1 |
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Other maintenance to do while subframe is dropped?
Planning on replacing my oil pan gasket soon and was wondering if there was anything else I should replace/repair while my subframe is dropped.
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02-20-2020, 07:34 AM | #2 |
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Engine mounts. Water pump/thermostat if they have lots of years on them and you want a little piece of mind. Need any work done to the turbos? WG arms need adjusting? Want to install downpipes (if you are still running stock ones).
Getting the subframe out makes all of that stuff really easy to get to. How many miles are on the car? I've heard some guys talk about replacing rod bearings if you have the oil pan off ....not sure I would mess with it unless you have 200k+ miles on the car and plan on keeping it for a lot more miles. |
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02-20-2020, 07:40 AM | #3 |
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Trans mounts, a engine mounts & O2 sensors.
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02-20-2020, 07:53 AM | #4 | |
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02-20-2020, 07:55 AM | #5 |
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02-20-2020, 08:05 AM | #6 |
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Engine mounts probably need to be replaced, though trans mounts may be worth inspecting first. That being said, they are relatively cheap and easy to replace even without removing the subframe. Just requires removing the plastic tray under the trans.
Not that they're easier to do with the subframe dropped, but if you're replacing the oil pan gasket, it's probably time to do the valve cover gasket and oil filter housing gasket as well.
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02-20-2020, 08:19 AM | #7 | |
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I looked through the vehicle records (father-in-law gave me the car back in Nov) and noticed that the oil pan gasket was already replaced 15,000 miles ago, valve cover gasket 10,000 miles ago, and the oil filter gasket 8,000 miles ago. However, when he got the oil changed in Oct (about 5,000 miles ago), they said both the oil pan gasket (I verified this) and the valve cover gasket already need to be replaced. Should the oil pan gasket already need replacing after 10,000 miles? I'll have to verify the oil filter gasket but kind of hard to believe it only lasted a few thousand miles. |
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02-20-2020, 08:30 AM | #8 | |
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02-20-2020, 08:42 AM | #9 | |
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02-20-2020, 08:44 AM | #10 | |
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Valve cover gasket is not too bad, but yeah more than 45 minutes. Maybe my scale of good-to-bad is just skewed now that I've owned bimmers for so long! (I think it's called Stockholm Syndrome...)
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02-20-2020, 09:15 AM | #11 | |
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02-20-2020, 09:52 AM | #12 |
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02-20-2020, 10:31 AM | #13 |
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02-20-2020, 11:36 AM | #14 | |
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I have an 07 335, so I wanted to prevent the power steering pump, pulley from ever hitting the subframe again. So, I put an aluminum PS pulley on & put 60a Poly engine mounts in their place. I also bought Rogue Engineering Trans mounts to compliment the engine mounts and create a sense of balance. Rogue Engineering mounts for the trans are the best money can buy for the N54, and they aren't that expensive. The Poly trans mounts set me back $399.00. At the time, the 335is mounts were $650.00 for the set. I'm not sure what they cost now. It's worth a look. Neither of them were available at FCP Not Only that, but I'm probably at around 500# of torque.. standard engine mounts won't like that!! |
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02-20-2020, 11:40 AM | #15 | |
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Should've bought them when they were like 300$. |
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02-20-2020, 11:43 AM | #16 | ||
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02-20-2020, 11:44 AM | #17 |
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02-20-2020, 11:58 AM | #18 | ||
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02-20-2020, 12:24 PM | #19 |
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02-20-2020, 12:32 PM | #20 | |
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02-20-2020, 12:32 PM | #21 | |
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Note: if you are running an app like xHp in conjunction with MHD, you are putting out a lot of torque. OEM mounts wont like that. The Turner Motor Mounts are stiffer than OEM and will cause some mild NVH for the first 200 miles or so. Gradually, after 2 to 3,000 miles the NVH at idol is almost non-existent, especially if you are running AC. You can always turn up the idol to say 750rpm and you will never feel the NVH. |
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02-20-2020, 01:08 PM | #22 |
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BOLO for leaky seals/gaskets when you do motor/trans mounts. The driveline settles on old mounts and putting in new ones will shift everything around.
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