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Manual Transmissions and DI/GDI engine issues #4550061
10/21/17 10:22 AM
10/21/17 10:22 AM
Joined: Apr 2017
Posts: 401
Mississippi
Speak2Mountain Offline OP
Speak2Mountain  Offline OP
Joined: Apr 2017
Posts: 401
Mississippi
Brainstorm: If more DI and Turbo DI engines had manually transmissions would that alleviate or eliminate certain problems inherent of this type

Re: Manual Transmissions and DI/GDI engine issues [Re: Speak2Mountain] #4550074
10/21/17 10:30 AM
10/21/17 10:30 AM
Joined: Feb 2015
Posts: 2,199
Slovenia EU
Kamele0N Offline
Kamele0N  Offline
Joined: Feb 2015
Posts: 2,199
Slovenia EU
Eliminate....you can revv it much easier on a highway in 4th or 5th gear to burn all the deposits


2011 Hyundai i30 1.4 CVVT Shell Helix Ultra 5w40
1997 Toyota Landcruiser KZJ95 3.0 TD Shell Rimula R6M 10w40
Re: Manual Transmissions and DI/GDI engine issues [Re: Speak2Mountain] #4550086
10/21/17 10:37 AM
10/21/17 10:37 AM
Joined: Oct 2014
Posts: 11,844
Idaho
CT8 Offline
CT8  Offline
Joined: Oct 2014
Posts: 11,844
Idaho
But then auto trans are programmed not to lug the engine.


2015 Ford F150 2.7
2018 Ford F350 6.2
Re: Manual Transmissions and DI/GDI engine issues [Re: Speak2Mountain] #4550092
10/21/17 10:41 AM
10/21/17 10:41 AM
Joined: Apr 2012
Posts: 5,153
MA
Wolf359 Offline
Wolf359  Offline
Joined: Apr 2012
Posts: 5,153
MA
Originally Posted By: Speak2Mountain
Brainstorm: If more DI and Turbo DI engines had manually transmissions would that alleviate or eliminate certain problems inherent of this type


That ship sailed a long time ago along with crank windows and manual locks. Automatics can last pretty long now. With a stick, you eventually need to drop the transmission and replace the clutch, the cost of which is about what the option on an automatic costs. Plus no one knows how to drive them because many models don't even offer it as an option.

Some say the issue is the fuel and use of top tier gas is more important with DI engines.

Re: Manual Transmissions and DI/GDI engine issues [Re: Speak2Mountain] #4550096
10/21/17 10:45 AM
10/21/17 10:45 AM
Joined: Dec 2011
Posts: 4,742
North Carolina
rooflessVW Offline
rooflessVW  Offline
Joined: Dec 2011
Posts: 4,742
North Carolina
I'm not sure what types of problems you're trying to eliminate by transmission choice.

I don't see a difference.


"Zed's dead baby, Zed's dead."
Re: Manual Transmissions and DI/GDI engine issues [Re: Speak2Mountain] #4550103
10/21/17 10:50 AM
10/21/17 10:50 AM
Joined: Apr 2012
Posts: 5,153
MA
Wolf359 Offline
Wolf359  Offline
Joined: Apr 2012
Posts: 5,153
MA
Plus I'm sure it's a lot harder driving a manual these days. It's hard enough with an automatic and trying to handle the phone, smartphone apps like navigation, music, etc.

Don't get me wrong, I drove a manual for years, but I don't miss it. It was fun at time, but other times it became a chore, especially in stop and go traffic.

Re: Manual Transmissions and DI/GDI engine issues [Re: Speak2Mountain] #4550117
10/21/17 10:59 AM
10/21/17 10:59 AM
Joined: Mar 2013
Posts: 4,763
The Midwest
skyactiv Offline
skyactiv  Offline
Joined: Mar 2013
Posts: 4,763
The Midwest
I have a GTI with a turbo direct injected engine and a six speed manual. I cleaned the intake valves at 80K. They were nasty, but the car didn't run any better after cleaning them. It wasn't that difficult to do. I'd hate to do it on a V engine.


Wife: 15' Audi A4 quattro 6 speed manual
Me: 13' VW GTI 3 door 6 speed manual
Re: Manual Transmissions and DI/GDI engine issues [Re: Speak2Mountain] #4550119
10/21/17 11:01 AM
10/21/17 11:01 AM
Joined: Mar 2013
Posts: 4,763
The Midwest
skyactiv Offline
skyactiv  Offline
Joined: Mar 2013
Posts: 4,763
The Midwest
BTW, my wife still takes mine or her stick car to Brooklyn a few times a year to see her parents. #NYC traffic


Wife: 15' Audi A4 quattro 6 speed manual
Me: 13' VW GTI 3 door 6 speed manual
Re: Manual Transmissions and DI/GDI engine issues [Re: Speak2Mountain] #4550121
10/21/17 11:03 AM
10/21/17 11:03 AM
Joined: Dec 2014
Posts: 1,251
California
Vuflanovsky Offline
Vuflanovsky  Offline
Joined: Dec 2014
Posts: 1,251
California
I think the "eliminate certain problems inherent of this type" can depend on your driving style, vehicle, and possibly even how the software programming is for the manual transmission as much as anything else. I don't specifically see manual transmissions as a remedy for whatever issues that you'll get anyway if you do nothing but short trips, idle for hours, and change the oil at 12K miles vs. 5K miles.

I have a five year old DI 6 spd. manual that doesn't seem to have any issues with deposits or fuel dilution to the extent it's portrayed on here. That's not to say that a 6 spd. manual DI of another make would be the same...so I think your question is likely more about how the car is treated and maintained AND the individual car than what transmission it has....

Re: Manual Transmissions and DI/GDI engine issues [Re: rooflessVW] #4550138
10/21/17 11:45 AM
10/21/17 11:45 AM
Joined: Jul 2005
Posts: 30,429
NY
demarpaint Offline
demarpaint  Offline
Joined: Jul 2005
Posts: 30,429
NY
Originally Posted By: rooflessVW
I'm not sure what types of problems you're trying to eliminate by transmission choice.

I don't see a difference.


Maybe an Italian Tune up is easier/safer with a M/T?


God Bless Our Troops

Re: Manual Transmissions and DI/GDI engine issues [Re: skyactiv] #4550140
10/21/17 11:48 AM
10/21/17 11:48 AM
Joined: Jul 2005
Posts: 30,429
NY
demarpaint Offline
demarpaint  Offline
Joined: Jul 2005
Posts: 30,429
NY
Originally Posted By: skyactiv
BTW, my wife still takes mine or her stick car to Brooklyn a few times a year to see her parents. #NYC traffic


Don't you love it? Try living here on L.I. and commuting into Brooklyn. LOL Thank God I only do it on occasion. My niece does it five days a week and wants to shoot herself on a Monday morning.


God Bless Our Troops

Re: Manual Transmissions and DI/GDI engine issues [Re: Speak2Mountain] #4550145
10/21/17 12:01 PM
10/21/17 12:01 PM
Joined: Mar 2013
Posts: 4,763
The Midwest
skyactiv Offline
skyactiv  Offline
Joined: Mar 2013
Posts: 4,763
The Midwest
Actually, what led me to clean them was that the butterfly's on my intake manifold would't open. A new OEM intake is surprisingly reasonable at $170 for my car. This thread is ironic. The dual mass flywheel went out on my car at 50K. I've had only two issues in 111K miles, but not issues the average DIY may wanna tackle. I will add that removing the intake and cleaning the valves was pretty easy on my car. It could be a royal pain on some vehicles.



Wife: 15' Audi A4 quattro 6 speed manual
Me: 13' VW GTI 3 door 6 speed manual
Re: Manual Transmissions and DI/GDI engine issues [Re: Wolf359] #4550147
10/21/17 12:02 PM
10/21/17 12:02 PM
Joined: Dec 2002
Posts: 42,085
New Jersey
JHZR2 Offline
JHZR2  Offline
Joined: Dec 2002
Posts: 42,085
New Jersey
Originally Posted By: Wolf359
Originally Posted By: Speak2Mountain
Brainstorm: If more DI and Turbo DI engines had manually transmissions would that alleviate or eliminate certain problems inherent of this type


That ship sailed a long time ago along with crank windows and manual locks. Automatics can last pretty long now. With a stick, you eventually need to drop the transmission and replace the clutch, the cost of which is about what the option on an automatic costs. Plus no one knows how to drive them because many models don't even offer it as an option.

Some say the issue is the fuel and use of top tier gas is more important with DI engines.


Interesting. I guess our 180k+ mile cars (driven in traffic and around town, two people even learned on one of them) that rotted around the transmissions (with original clutches) must not have gotten the memo.

I can think of a few ATs that required multi-thousand dollar overhauls around the 150-200k mark.

Going by your logic:
AT: $1000 AT acquisition + $3000 refurbishment at 200k = $4000 lifecycle cost
MT: $1000 clutch replacement at >180k = $900 lifecycle cost

And $1000 is being pretty highly paid for a clutch job...

So if $1000=$4000, I must have learned math wrong.

Re: Manual Transmissions and DI/GDI engine issues [Re: Kamele0N] #4550149
10/21/17 12:07 PM
10/21/17 12:07 PM
Joined: Apr 2014
Posts: 1,252
South Central PA
Delta Offline
Delta  Offline
Joined: Apr 2014
Posts: 1,252
South Central PA
Originally Posted By: Kamele0N
Eliminate....you can revv it much easier on a highway in 4th or 5th gear to burn all the deposits


If you're in the know. If you shift my GTI the way the dash indicates you are lugging all the time. 45mph in 6th gear, yea no thanks...


'17 VW GTI 2.0T - 6MT - 9K - Edge 0w40
'15 Camry SE - 2.5 - 20K - PP 0w20
'99 S10 - 2.2 5MT - 155K - T6 0w40
Re: Manual Transmissions and DI/GDI engine issues [Re: Speak2Mountain] #4550197
10/21/17 01:22 PM
10/21/17 01:22 PM
Joined: Sep 2015
Posts: 3,861
Connecticut
69GTX Offline
69GTX  Offline
Joined: Sep 2015
Posts: 3,861
Connecticut
I would think for the majority of manual transmission driver's out there that they should expect at least a synchro change out in the 100K-175K mile range...less if they didn't pay attention to fluid changes or the right type of MT fluid along the way. If you're going 180K-200K miles on original clutch and transmission parts, you are probably in the top 5-10% of all users. Once you're inside a trans for shifting/synchro or shifting issues, that's probably another $1500-$2500 if you can't do it yourself. You will likely find other components to address besides just the synchro's.

My last auto transmission was at the 230K mile point when the engine died. It was still doing great...probably on its way to 250K-300K miles. Oddly, that was a poorly applied transmission known to give problems and typically fail in the 100K-175K mile range. Fwiw, I've had 4 manual transmission cars over the years, all muscle or performance V8's. The only failure to date was a throw out bearing...but I've also never driven one past the 55K mile point either.


----------------

2001 Lincoln Cont 4.6L DOHC/ 39K mi / QS HM 5w30 / FUG XG2
1999 Camaro SS M6 /19K /Mobil 1 0w40 /Fram UG /GM MTL-ATF
1969 Ply GTX/RRs
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