George Cooper put the Railwaymen in front, and the win was sealed through Harry Davis’ effort three minutes before the break as the O’s struggled to create clear-cut opportunities in front of goal all afternoon.
The O’s named an unchanged side from the one which won 3-1 at Hartlepool United, but there was space on the bench for Jay Simpson on his return from injury, along with new signing Michael Collins.
It took until the sixth minute for the first opportunity of the game and it came from a Callum Kennedy free-kick from fully 35 yards, however, Ben Garrett in the Crewe goal was able to comfortably hold the effort.
While the O’s had the bulk of the possession chances were few and far between. Alex Cisak had to be on top form once again though when former O Chris Dagnall fired goalwards, but the Aussie keeper parried the effort away from danger.
The game continued in a similar vein, but the visitors were able to take the lead with 33 minutes on the clock when Orient failed to clear their lines and Cooper pounced to curl a shot left footed into the top corner beyond the outstretched dive of Cisak.
The goal rocked the O’s and only a Tom Parkes clearance off the line denied the Alex a second when a fizzed ball in from Cooper found Kiwomya who shot across goal.
It got worse for Cavasin’s side before the half-time break though as with three minutes left on the clock Davis was able to get in behind the O’s and poke past Cisak.
That was how it remained at the break and the O’s made a substitution at the start of the second period with Collins coming on for his debut, replacing Bowery.
Just like the first half, the O’s started the second brightly and Collins was involved heavily in the build up as Palmer was presented with an opportunity having turned his man. He powered through on goal, before seeing his shot tipped behind by Garrett.
Ulrich Nnomo and Jay Simpson were brought on to try and force a late fightback from Cavasin’s side, coming on for Gavin Massey and Nigel Atangana respectively.
Nnomo played an almost instant role, delivering a ball over to Robbie Weir, but the skipper’s curling effort was wide of the mark.
Palmer managed to work another opening inside the box with 10 minutes left but the striker was crowded out and the chance went begging.
Nnomo’s afternoon was to be cut short though as we stretchered off late on in proceedings, meaning the O’s ended the game with 10 men having using all three substitutes.
Crewe could have piled on the misery deep into the seven minutes of stoppage time after pouncing on the O's losing posession, but Cisak was to the rescue to keep out Billy Bingham's fierce effort. and that proved to be the last action of the game as Orient fell to defeat.
Orient: Cisak, Janse, Hunt, Parkes, Kennedy, Massey (Nnomo 72), Weir, Atangana (Simpson 72), Semedo, Palmer, Bowery (Collins HT)
Subs: Sargeant, Dunne, Adeboyejo, Benedicic
Crewe Alexandra: Garrett, Turton, Davis, Guthrie, Bakayogo, Cooper (Lowery 87), Jones, Hollands, Kiwomya (Ng 89), Dagnall, Lowe (Bingham 78)
Subs: Richards, Nugent, Udoh, Ainley
Goals: Cooper (33), Davis (42)
Booked: Bakayogo (19), Turton (75)
Attendance: 4,366 (299 Crewe Alexandra supporters)
Referee: Andy Haines