03-11-2019, 07:57 PM | #23 |
Chuggin' Along
333
Rep 588
Posts |
|
Appreciate
0
|
03-11-2019, 08:14 PM | #24 |
Luxury at the redline :)
9108
Rep 7,563
Posts |
The M2's N55 does have forged internals but its a carry-over from the M235i N55 built.
The M2 N55 has unique pistons and an aluminum oil pan/suction from the S55, a turbo from a 335i and a electric blowoff valve from the N20. https://www.bimmerpost.com/goodiesfo...l-training.pdf Page 23: |
Appreciate
0
|
03-11-2019, 08:16 PM | #25 |
Private First Class
45
Rep 149
Posts |
This explains why N55s have had a tendency to wear out rod bearings faster than one would expect, the sump pickup is different and as they said in the video sometimes it sucks in air because it only picks up from one place as apposed to three. Oils starvation over a long period of time. Moral of the story, keep a lot of oil in your pan, never let it get low, change it often and keep an eye on it. Too bad they didnt think about that when they decided to delete the dipstick...hmm
__________________
2011 335I, E90, AT, Sport Package, FBO, Eibach 1" Lowering Kit w/ Koni Orange. MHD, 88k miles 2nd owner - Sold
2003 330XI, MT, bone stock, 160k miles - Sold 1988 325I Coupe, MT - Retired, 280k miles - Sold 2019 X7 XDRIVE 40I - Wife's |
Appreciate
5
|
03-11-2019, 08:27 PM | #26 | |
Chuggin' Along
333
Rep 588
Posts |
Quote:
One day they'll get it right. To get around these issues, the rod bearings will have to be replaced as preventative maintenance. Some vendor will create a baffled oil pan that will help with the pickup issue, or you can install a dry sump solution, both of which will only be needed for the hardcore racing situations. In that case, I think an S55 would be better to track. |
|
Appreciate
1
Dackelone10627.50 |
03-11-2019, 08:46 PM | #27 | |
Private First Class
45
Rep 149
Posts |
Quote:
__________________
2011 335I, E90, AT, Sport Package, FBO, Eibach 1" Lowering Kit w/ Koni Orange. MHD, 88k miles 2nd owner - Sold
2003 330XI, MT, bone stock, 160k miles - Sold 1988 325I Coupe, MT - Retired, 280k miles - Sold 2019 X7 XDRIVE 40I - Wife's |
|
Appreciate
1
pizza240836.50 |
03-11-2019, 09:44 PM | #28 |
Major General
7379
Rep 7,336
Posts |
Where did you see they had any design input? It’s not like they had any choice for the Supra. They don’t have an inline 6, so it’s basically take it or leave it. The more you look at the Supra the less it seems like Toyota did anything but sheet metal and rubber stamp it.
|
03-11-2019, 09:47 PM | #29 |
Major General
7379
Rep 7,336
Posts |
I wouldn’t hold your breath. The crank hub spinning is pretty rare in stock cars. I don’t have data but it seems at least an order of magnitude less likely than S65 rod bearing failures. Given that they never recalled S85 or S65, I doubt you’ll see it here.
|
Appreciate
1
M-Pilot4861.50 |
03-11-2019, 10:02 PM | #30 | |
Chuggin' Along
333
Rep 588
Posts |
Quote:
EDIT: Looks like N54 & N55 engine owners should be scared too, according to Mr. Radowski's website: https://maximumpsi.com/products/maxi...it-s55-n55-n54 And another, but Gintani doesn't mention N series engines: http://gintani.com/product/gintani-f...-hub-solution/ Last edited by switlikbob; 03-11-2019 at 10:09 PM.. |
|
Appreciate
0
|
03-11-2019, 10:11 PM | #31 | |
Major General
5873
Rep 6,638
Posts |
Quote:
Last edited by akkando; 03-11-2019 at 10:20 PM.. |
|
03-11-2019, 10:39 PM | #32 | |
Major General
7379
Rep 7,336
Posts |
Quote:
|
|
Appreciate
0
|
03-11-2019, 10:44 PM | #33 |
Private First Class
45
Rep 149
Posts |
Toyota was involved in this project way more than people think.
__________________
2011 335I, E90, AT, Sport Package, FBO, Eibach 1" Lowering Kit w/ Koni Orange. MHD, 88k miles 2nd owner - Sold
2003 330XI, MT, bone stock, 160k miles - Sold 1988 325I Coupe, MT - Retired, 280k miles - Sold 2019 X7 XDRIVE 40I - Wife's |
03-11-2019, 10:52 PM | #34 |
Major General
5873
Rep 6,638
Posts |
|
Appreciate
0
|
03-11-2019, 10:57 PM | #35 |
Major General
7379
Rep 7,336
Posts |
I don’t think that video is anything but eyewash. There are inconsistencies in that video vs what has been written in interviews with Tada. The Z4 and Supra are on BMWs CLAR chassis and there isn’t a lot of hard evidence of any Toyota contributions. B series engines were already in development, maybe they gave their 2 cents or maybe they are just trying to look like they didn’t pay BMW to rebadge a Z4.
|
Appreciate
2
ZHPsedan135.50 SYT_Shadow11504.50 |
03-11-2019, 11:00 PM | #36 |
Private First Class
45
Rep 149
Posts |
So they made all that up in this video?
__________________
2011 335I, E90, AT, Sport Package, FBO, Eibach 1" Lowering Kit w/ Koni Orange. MHD, 88k miles 2nd owner - Sold
2003 330XI, MT, bone stock, 160k miles - Sold 1988 325I Coupe, MT - Retired, 280k miles - Sold 2019 X7 XDRIVE 40I - Wife's |
Appreciate
0
|
03-11-2019, 11:24 PM | #37 |
Major General
7379
Rep 7,336
Posts |
Big on marketing, short on details and doesn’t align with some other written articles. Maybe these guys are right but we’ll never know. The results certainly look like all Toyota did was write a check to BMW.
Fact is, it’s built on a BMW chassis and engine that were both already planned and nearing completion. There is nothing Toyota I can find about this car other than sheet metal and the startup logo on the BMW iDrive. My Mazda 3 at least had FoMoCo stamped all over the place . This is a really small volume sports car anyway, it’s not exactly a Camry that needs to go 250k miles. Maybe BMWs process really is this deficient to where Toyota could improve the reliability with analyses that BMW should already have been doing... guess time will tell. I mean, they keep repeating that BMW and Toyota went their separate ways but I’d like to know how. The firmware is all Bosch/BMW. Entire chassis appears to be the same, struts look to be from BMW bin. Maybe spring rates are different. The interior is identical with some cheaper materials but all still BMW parts. What could they possibly have tuned themselves, in isolation? BMW even did road testing of both simultaneously. Last edited by chris719; 03-11-2019 at 11:40 PM.. |
Appreciate
0
|
03-12-2019, 12:53 AM | #38 |
Major
524
Rep 1,105
Posts |
There are two problems related to the crank hub: first there have been cases of the crank bolt to back out due to vibrations which can be resolved with a crank bolt capture, and the 2nd problem is the fact that it is not a one piece hub and that in some occassion the sprockets spin which can be resolved with for example the Gintani kit.
The solution to the aforementioned is a combination of both solutions. If you are paying someone to have it done you are looking at a major cost of approximately $5000 due to extensive labour costs, could take a tech 30 to 40 hours for the work. The F8x produced after December 2015 have a new bedplate design and friction plated but that did not resolve the problem. The number of cases are still very rare... |
Appreciate
1
nino791.50 |
03-12-2019, 01:31 AM | #39 |
New Member
17
Rep 11
Posts |
|
Appreciate
0
|
03-12-2019, 02:32 AM | #40 |
First Lieutenant
182
Rep 357
Posts |
"Complex machine has unforeseen reliability issue" is nothing new. Thank god for the enthusiasts and after market companies that can come up with fixes to problems years after the manufacturer's stopped warranting them.
Rod bearings and throttle actuators in S65, water pumps and carbon build up in N54, vanos and solenoid issues in S54... Even the W204 AMG C63 had a head gasket bolt problem and excess wear on the camshaft lobe and valve lifter and the engine wouldn't restart if it was "too hot" after a spirited drive. Just don't buy a TVR if you like to sleep easy I'm going to get extended engine warranty on the off chance I might get a Spun Crank Hub. Otherwise drive it as it was designed to be driven |
Appreciate
0
|
03-12-2019, 03:19 AM | #41 | ||||
Know's a guy that know's a guy...
5639
Rep 1,905
Posts |
Quote:
Quote:
|
||||
Appreciate
0
|
03-12-2019, 03:35 AM | #42 | |
Major General
7379
Rep 7,336
Posts |
Quote:
Vanos is at least something relatively complicated and has changed a lot over time. One would think they would know in simulation if the engine is going to eat rod bearings. |
|
Appreciate
0
|
03-12-2019, 04:59 AM | #43 | |
Colonel
1125
Rep 2,564
Posts |
Quote:
Also, MDM puts everything in comfort. |
|
Appreciate
0
|
03-12-2019, 05:27 AM | #44 | ||
First Lieutenant
182
Rep 357
Posts |
Quote:
Porsche had to recall the 991.1 GT3 multiple times due to the engine catching on fire, misfires etc. They ended up giving every owner a 10 year warranty on the engine. Not really an issue when you're selling only a low volume of that particular car. I would think honouring 80,000 extended warranties on the F8x series when they make less margin than Porsche does on each GT3 might not be that commercially savvy. |
||
Appreciate
2
SYT_Shadow11504.50 Remonster824.00 |
Post Reply |
Bookmarks |
|
|