R Dubya Posted April 17, 2007 Report Share Posted April 17, 2007 I'm doing a head job on a 3400 right now, although it is a van it applies to w-bodies as well so this is where I'm placing it. Is the wire routing the same on the 3400 as it is on the 3.1L LH0 or LG5? 1-3-5 in the back and 2-4-6 on the front? How about coils? 1-4 6-3 2-5 from left to right, is that correct? Almost done with this thing just want to be sure it goes back together right, someone took apart the plenum and very top of the engine so I am clueless as to how the rest of it goes back together, but all I have to do is reconnect the harness and then install the plenum and intake tubing, as well as the vac lines. TIA to all those who can help! Quote Link to comment Share on other sites More sharing options...
19Cutlass94 Posted April 17, 2007 Report Share Posted April 17, 2007 if it is the same as the 3100, your correct in that the 1-4 6-3 2-5 order. The coils, in order from driver side to passengers goes ( for the front ) 4-3-5. In the rear its 1-6-2. Quote Link to comment Share on other sites More sharing options...
R Dubya Posted April 17, 2007 Author Report Share Posted April 17, 2007 I just want to make sure, cylinders 1-3-5 are the rear of the engine, 2-4-6 are in the front? I don't want any backfires I'm trying to rid this thing of an EGR code and want to make sure its running good so I can sell it, my house needs windows. Quote Link to comment Share on other sites More sharing options...
19Cutlass94 Posted April 17, 2007 Report Share Posted April 17, 2007 The actual engine, cylinders, 1-3-5 are up front and 2-4-6 are on the rear. Quote Link to comment Share on other sites More sharing options...
GutlessSupreme Posted April 17, 2007 Report Share Posted April 17, 2007 Check the emissions sticker also, picture the engine as if it were RWD. the foremost cylinder would be one (rear bank should be offset forward, so 1 would be rear pass side) and rearmost (closest to tranny) would be 6. Quote Link to comment Share on other sites More sharing options...
R Dubya Posted April 17, 2007 Author Report Share Posted April 17, 2007 I am aware of the "position" of the engine, but I am saying relative to the way that you would look at this engine, standing in front of the core support, in a FWD vehicle, cylinders 1-3-5 are against the firewall, 2-4-6 are near the front of the car, correct? Thats what I need to confirm. Rear passenger side? If I am correct, which I think I am, cylinder 1 would be front passenger side. You are confusing me!!! On the 3.1 1-3-5 are against the firewall and the evens are up front. Someone please confirm this is the case on the 3400?? Quote Link to comment Share on other sites More sharing options...
GutlessSupreme Posted April 17, 2007 Report Share Posted April 17, 2007 Rear passenger side? On the 3.1 1-3-5 are against the firewall isn't that what I'm saying? if it's against the firewall then why would it be in the front? firewall (rear) 1-3-5 -2-4-6 front of car (front?) Quote Link to comment Share on other sites More sharing options...
R Dubya Posted April 17, 2007 Author Report Share Posted April 17, 2007 yeah but cylinder 1 is nearest the timing cover, and if you rotate the engine 90* counterclockwise the #1 cylinder would be in the front, passenger side, unless I am seeing thinking something different you wrote pass side rear. Thats whats confusing me. Quote Link to comment Share on other sites More sharing options...
19Cutlass94 Posted April 17, 2007 Report Share Posted April 17, 2007 If you are looking straight at the front of the engine, from the passenger side, cylinders 1-3-5 will be to your right and cylinders 2-4-6 will be to your left. Or if you are looking at it from the front of the car/van whatever it is, the front of the engine nearest you, are cylinders 1-3-5. the rear of the engine, by the firewall, by the coilpacks are cylinders 2-4-6 Quote Link to comment Share on other sites More sharing options...
R Dubya Posted April 17, 2007 Author Report Share Posted April 17, 2007 thats not how it was on the 3.1 L though, the first cylinder is the left most cylinder against the firewall. I assume it has changed?? Can anyone else confirm this is the case? Quote Link to comment Share on other sites More sharing options...
badassoldspower Posted April 25, 2007 Report Share Posted April 25, 2007 No, on the 60 degree v6, cylinders 246 are on the bank closest to the radiator, and 135 are closest to the firewall. Note: Gm service manual Quote Link to comment Share on other sites More sharing options...
R Dubya Posted April 25, 2007 Author Report Share Posted April 25, 2007 that's what I thought, and forgot to post that I was actually right with my #'s. However upon startup with the wires on the correct coils I had a mulitple cylinder misfire, so I swapped them around thinking I crossed one behind the engine, and to anyone that does this job on a van knows you cannot see shit on the back of the 3400!!! Anyway, put them back in original order, cleared the code, and fired it up, puuuurrrrs like a kitten. Easy a pie. I was scared though, GM specs on torque are 44 ft. lbs. then another 95* on the headbolts. WOW. I replaced them because I didn't want to deal with a break, and it one broke, Advance was buying me a new headgasket, and paying the labor to remove the bolt. Thankfully, everything worked out. Thanks for the posts guys. Lock this down if desired. Quote Link to comment Share on other sites More sharing options...
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