Looking to bite the bullet and go with a single, was wondering if anyone has a good checklist of things to check or other preventative maint. stuff when doing the install, especially if doing a port injection kit w/intake manifold off and/or relocating the overflow coolant tank. Here is what I'm thinking:
- Perform leakdown test before ordering. I doubt anyone would want to drop $8k+ only to find they have a bad/weak cylinder.
Assuming you're good on the leakdown results:
- Replace OFH gasket if weeping/leaking
- Clean intake ports if needed
- Check plugs for soot/wetness, then replace. Replace and recode any leaking injectors
- Good time to replace HPFP if logs indicate weakness
- Check exhaust ports for oil weeping
- Check valve cover gasket for leaking
- Upgrade PCV
Considering the cooling system is also drained and the turbos are off, are there any ways to test if the waterpump needs to be replaced? I've read this is a common failure point on the N54, especially if you let your OFH gasket leak for a while.
One more note: I'm not suggesting the only time to address these issues are when you're going to have your turbos off, just thinking labor wise, it presents a good opportunity to address.
- Perform leakdown test before ordering. I doubt anyone would want to drop $8k+ only to find they have a bad/weak cylinder.
Assuming you're good on the leakdown results:
- Replace OFH gasket if weeping/leaking
- Clean intake ports if needed
- Check plugs for soot/wetness, then replace. Replace and recode any leaking injectors
- Good time to replace HPFP if logs indicate weakness
- Check exhaust ports for oil weeping
- Check valve cover gasket for leaking
- Upgrade PCV
Considering the cooling system is also drained and the turbos are off, are there any ways to test if the waterpump needs to be replaced? I've read this is a common failure point on the N54, especially if you let your OFH gasket leak for a while.
One more note: I'm not suggesting the only time to address these issues are when you're going to have your turbos off, just thinking labor wise, it presents a good opportunity to address.