I am seeking help to see if it is possible to put glow plugs on a 1959 D47u dozer. My pony motor failed and did a 24v conversion full start.   Though being from canada cold weather sucks and dozerstays parked after low temps hit.

Glow plug chambers can be fitted to 7U19787-up or 6U8012-up if they have the correct cylinder heads for those s/n's. You will need new chambers, part number 1S1967 and glow plugs (24v only) part # 3H2033. You will need to make your own wiring harness plus add a solenoid to handle the 20 amp load.
There are still temperature limits, with really cold temperatures requiring ether assist. Do not run glow plugs and ether at the same time or risk blowing something up.

I will have to check my serial numbers . I made my own plate for pup engine cover ...to allow coolant circulation which will have a inline warmer and circ pump...... the pup engine exhaust i blocked with a machined fitting that i thought down the line i could adapt to generator exhaust to warm head.....would that be sufficent ?

Exhaust heat would help but it depends on the temperature of the exhaust when it is actually at the intake manifold heat exchanger. Glow plugs are figured to add about 150 degrees to the pre-com chambers.

-glow plugs work great to about -10 degrees Celsius (15F) after that it gets trickier and more of a process (pita)

-next best step, an electrical block heater of some type, i prefer something internal so the heat is actually within the block and keeping the frost out...

-combine both if and when possible..

-this will simplify your life greatly  

i am currently doing a conversion on my d4 but i'm still driving the original starter clutch mechanism.

for a bit of preheating i have decided to get a manifold heater plug like what many Massey and Ford tractors had in the 60s/70's they just screwed into a 3/4 pipe thread in the intake. our ford has the spot bunged off well warm climate in winter we don't get below freezing temp so not needed.

to use it i would have to either drill and tap a thread in the intake of the main or weld/silver solder a threaded socket onto it for mounting. control could be really simple with a normally open push button switch and relay or a switched timer relay for better control. just another way of doing it.

thoughts people.

another thing about aerostart (ether start fluid) dont use it on propane(autogas) fueled engines unless you want to create a mail box out of your engine it reacts with propane very badly. to 'help" them start a rag dampend with petrol held over the intake while cranking works just fine.