[Scarebird]

I think you are confusing the DOD/AFM feature with DI.

DI uses a cam driven booster pump.

DOD uses oil pressure to activate lifters. That was deleted here and plugged off.

2019+ engines have this issue. My 2016 GMC Sierra has not (so far).

[62posbonny]

he's talking about DI not having constant fuel spray to keep the back of the valves clean. Catch cans are cheap and easy and make sure the PCV system doesnt suck in excess oil vapor that will gum up the back of the valves over time.

[Mr_GTO]

Originally Posted by Scarebird

I think you are confusing the DOD/AFM feature with DI.

DI uses a cam driven booster pump.

DOD uses oil pressure to activate lifters. That was deleted here and plugged off.

2019+ engines have this issue. My 2016 GMC Sierra has not (so far).

Any DI engine has the issue. My 2010 V6 Equinox has this issue. Fuel is introduced into the combustion chamber, air and oil vapor are the only things going through the intake. Reduce the oil vapor, reduce the build up on the backs of the valves.

[Scarebird]

I will research the oil vapor issue more and see if it warrants attention.

Had some time today to address the clutch and master cylinder. I was originally going to mount the clutch master with a brace under the master cylinder but decided to build this:



It mounts inside the firewall and holds the clutch master. It also seals off the engine compartment better. It is a bit to fish thru the firewall. It also ended up being a bit off center but won't affect anything.

Were I to make more I would build a fixture to make them dead square.



These two sets of holes define the brake stop switch mount. The uppers are for manual - lower does power brakes.

Note also the pedal height dimension - useful data the shop manual has!