Quote:
Originally Posted by SimpleJack
Quote:
Originally Posted by hardparker
I've had some minor boost leak issues in the past that I've vanquished by replacing all of the pressurized OEM charge pipe seals with o-rings.
Harkes first put forward replacing the charge pipe to throttle body o-ring with a larger o-ring. I figured I'd flesh in the rest for those who want to replace the rest of the OEM seals with better sealing, inexpensive, non-directional o-rings. The grand total of this setup is $3.00, plus shipping. I've boost leak tested it up to 30 psi without any leaks.
Be warned that installing fresh o-rings requires significantly more effort. After they've been installed for a while, they form to the seal path better and are easier to reinstall. That first time is a real pain, but it can be done. Be sure to lightly grease both the o-ring and the sealing surface that it'll be sliding onto.
These are the largest cross section o-rings I've been able to fit. Hope this makes all of your boost leaks go bye bye, too. 
Turbo outlet: 1 - 4.5mm X 49mm - $.98
https://www.theoringstore.com/store/...ducts_id=17446
Throttle body: 1 - 4mm x 81mm - $.90
https://www.theoringstore.com/store/...ducts_id=39576
Intercooler: 2 - 4mm x 59mm - $1.12
https://www.theoringstore.com/store/...oducts_id=2242
For looser fitting charge pipe to IC cold side fitments, thejeremyman9 found that a 4.5mm x 60mm o-ring, lightly sanded to reduce it's thickness, worked best at eliminating leaks.
Loose intercooler cold side option - 1 - 4.5mm x 60mm - $1.07
https://www.theoringstore.com/store/...ducts_id=17451 |
Just ordered a FMIC CP and TIC kit from ER. Reading a bunch of this thread makes me a bit nervous for fit and potential leaks. Think I want to replace all the orings even though my car only has 22k miles on it. The oring site is out of stock of the intercooler orings. Anyone know of another site that has reliable, snug fitting, rings?
If it matters, my car is a 2015 435i xD gran coupe |
If you're buying ER this probably isn't something you need to worry about.