SMOKE ON COLD START UP

[john62m]

got another4jg2t gear drive motor from motor importer to replace motor that had been dusted when i put it in it started first go but it had a miss when cold i decided to do the injectors they were corroded in and when i pulled them out the heat shields and copper washers were buggered i had trouble getting them outi was also dropping rubbish down hole so i decided to pull the head off i did the head up got the injectors done replaced washers and glow plugs when i start it cold it throws out heaps of smoke i think it is diesel smoke because it hurts my eyes could the pump need doing up the motor doesn,t breath at all but is pushing enough oil out of the pvc valve to coat the inside of the pipes also am not shure if the vacuumpipes are hooked up properly also could you tell me the differance between gear driven and belt driven 4jg2 motors are they interchangable i would be gratefull for any information i need to get the smoke issue fixed it wont pass rego the way it is! regards john62m

[pig75]

The only gear drive motors i have heard of were the 4ja1 & 4jb1. I thought all 4jg2 motors were belt drive

[john62m]

it is definately a 4jg2t gear drive it has a ve type fuel pump

[john62m]

although the information i am looking for would be good i am not only here for that reason it would be good to get it sorted so i can use it i have had a stroke i try to do the work myself even if it takes me twice as long as it should i would like to get this thing on the road and use it before i end up on the other side of the grass

[geeves]

have you still got the old injectors? How many holes in the bottom of them?
Very few markets got the gear drive 4jg2 Aussi was one. The gear drive 4jb1 is far more common and Im wondering if you got a 4jb1 by importers mistake and now have 4jg2 injectors in it. The heads on these are so different that the wrong injector will not work correctly.
Also when you had the head off what shape was the combustion chamber

[john62m]

thanks for getting back to me i am sorry about the email directly to you when i first asked about the motor i could,nt work out how to get on the forum at that stage the injectors where the old ones done up regards john

[geeves]

what about the head?
4jb1 has a flat head and dished pistons 4jg2 has flat pistons and dished head

[john62m]

pistons are definately flat on top with small recesses for valves the head is dished they asked if i wanted belt or gear drive it has 4jg2 on the back left hand side of block as well as engine number

[Roderunner]

It sounds like there is some air being sucked into the injection pump along with the diesel. The hand priming pump often develops a leak, as do hardened rubber fuel lines. I rigged up a 12 volt fuel pump on mine to ensure that bugger all air gets into the system, it works well! I have seen a diesel blow clouds of blue smoke when the injector lines were put back on wrong,it's really easy to muck up on the pump end, the engine still ran though, just not very well. I can check out my injector pipe position on the pump if you don't have another to copy off!

[geeves]

There will be an engine manual in your bigpond email in about 5 minutes