How to remove the exhaust manifolds from your 5.2 BSM Engine:
Awesome.
Subscribed on Youtube.
Good on you for posting.
Greg, I believe you are in Michigan. Do you work on other people cars by chance? I also have an S8 and struggle to find somebody who knows these cars
I have a couple of times, but typically barely have enough time for my own junk, and my baby should be here in about 49 days so spare time is gone lol. But, PM me regardless if you want.
Finished installing new flex joints in the manifolds. I was oroginally just going to drill and ream the cats but then remebered cats are worth $$. Best price i coudl find nationally though is 70 a pop. Then it wuld take me a full day to weld in piping and relocate the O2 bungs…not worth my time for the 280$. its alot of work and a good chance to mess up orientation and hve clearance issues. This packaging does not offer alot of wiggle room. Im just going to drill them out.
Look to be about 600 cell/square inch units. New 200 cell magnaflows will be in on friday. All my gaskets and bolts should be in monday or tuesday so i can start reassembling the top end. Going to pull the rockers and lifts so i can start on the bottom end ahead of when the new bolts come in. Got alot of cleaning and degreasing to do so want to be ready to go once the parts are in.
This is a HUGE service you’re doing for the V10 community… just wanted to say thanks for documenting the process in such great detail. I will certainly be following your series.
thanks for the sub, only 880 more to go before I can start getting paid!
First time doing stainless TIG, only did aluminum before. Not used to it so I ended up using way way too much heat. Welds look ugly but they are structurally sound. O have a ton of pie cuts to weld still so im sure the weld aesthetic quality will improve with more practice.
Also got the magnaflow 200 cell cats in, they are indeed quite open. We got 10 cylinders breathing into 2 3" opening cats where as before it was 10 cylinders breathing into 4 1.75" opening cats.
I will also open up the muffler inlet diameter to accomodate the 3" pipes. Yes using the stock mufflers, no $$ for anything more. The hi flow cats, close coupled X pipe and 3" piping should really open her up, i hope!
https://i.imgur.com/3ivEdnr.jpg
https://i.imgur.com/3yiXzvp.jpg
Awesome news! Are you removing all the resonators? Just an fyi when I did that on my old s6 with 2.75 minus the high flow cats to stock mufflers it was a toUch raspy. I actually liked it, but for some people it was too much. It just kinda overpowered the stock mufflers especially right on a cold start. I still enjoyed it enough to never bother changing it though $$$
Perhaps the stock s8 mufflers flow better. Ether way Interested in sound clips and drivebys once it’s one!
Yes I am deleting all resonators. From the videos I have seen and other non audis i have heard, they dont sound too good with no resonators. They are indeed raspy.
what DOES sound really good though, is keeping resonators but deleting mufflers. My LS400 is like this and i LOVE the way it sounds. nice bassy idle note, a bit droney on light acceleration but nice clean non raspy note.
However my resonators are in poor shape. forward ones have split at the fold, rear one (1/2) has phytsical damage from road debris.
I can always add a resonator or change the muffler later. I just hate dealing with tip alignment. I spent an entire weekend getting the tips straight on my lexus.
100% will post a ton of exhaust clips later. Planning on buying a little gopro mic with a fuzzy wind screen. Everyone likes exhaust videos.
Well, cats are out. Heres a comparison of cell density:
Also, pulled lower oil pan off…i see coolant stuck to alot of surfaces…and i do have dissapeari g coolant. I dont think its from me turning the motor over and possibly coolant getting into the pan…i dunno…weird.
Possibly oil cooler. Will pressure test it. Also took a sample from the oil silter and will send that out for analysys.
Most likely the rear upper timing chain cover o-rings are leaking coolant into the timing chain area and thus the oil. It happens on the RS4s and other 4.2 FSI engines over time and northern cars that see really cold winters seem to be the worst effected. I think that is because the rubber shrinks. Good work so far!
driving it down to work so i can TIG up the exhaust.
It is actually very very quiet at hot idle, i don’t understand how it is so quiet lol
https://youtu.be/e4lzLS7zhJw
Jimmy, got the oil analysis back.
Sed there was sodium and potassium in the oil but valvoline uses sodium in additive pack so hard to tell how much coolant.
Im guessing not alot since he said wear metals were next to non existant and no fuel contamination. Overall health of the motor is great. Nice to get that confirmation!
Regarding the orings, when i pulled them off , they were hard and brittle, also looked like they were pitting.
I pulled the oil cooler off, put 30 psi to the coolant side and dod not hear/feel anything come out the oil side, i ruled the oil cooler as good.
Well that’s pretty good news
It works and followed!