1973 GMC Cabover Will It Start???

[@noshsreqd]

It's actually a 6V53 Detroit you have there. 3/71 on the governor housing tag is date of manufacture. DWLS stands for Dual weight, limiting speed governor as there are a few different types depending on the application. It would be good to check the rack and be sure no injectors are stuck before getting it running, make sure the emergency stop flap isn't tripped either. Also check the travel and movement of the engine stop cable to the top of of the governor housing that it's fully releasing.

[@cfnevada]

Awesome! Thank you for the info. We were wondering and been search online trying to find out everything We can. Never tore into one of these engines before. Definitely going to check all those before we do any more.

[@David_Richard_241]

I have always loved these GM cabovers since I was a kid in the 60's. When I turned 16 I drove one with a small box on it delivering furniture part-time. I was lucky, man.

[@David_Richard_241]

(The one I drove had the GMC gas V-6.)

[@cfnevada]

Awesome!

[@neilmcintosh1200]

Glad to see you making a start on this great little truck.

[@cfnevada]

Me too!

[@ben6119]

Nice to find one of those with a Detroit and air brakes. Most were gas/hydraulic and not worth messing with. Nice truck!

[@cfnevada]

Thank you! It’s definitely an awesome find.

[@dwightcorbett8889]

I'd love to hear this beauty run, it's been quite a while since I've heard anything smaller than a 4 71 Detroit.

[@gwstonemason]

Hi mate, yeah 6V53, identical to the one in my Ford Louisville and yes do not start it until you have checked the free movement of the rack and injectors. Rack rests at wide open throttle when not in use and will runaway unless free. Would be worth looking at Bus Grease Monkey on YT, he's a wealth of info on anything 2 stroke Detroit.

[@cfnevada]

Awesome. Thanks for the info! Glad it didn’t start on us without knowing.

[@WhiskeyDents]

I just bought one for my channel. Mines a 366 gasser with a 4 speed

[@dieselgypsy1100]

Did you ever get this truck running? If I would have seen this when you were doing this I could have told you that @ stroke Detroits HATE being run out of fuel! You would need to bleed the system completely, making sure the heads are both full of fuel and no air or you can crank it all day and it won't go! Also, as others have said, you should always make sure the racks and injectors are all free before attempting to start it. Also make sure the air shutdown flap is free to move (and that it is open to start with). Hope it went well!

[@cfnevada]

@@dieselgypsy1100 thank you for the info! Yes we did stop after realizing there is a lot more things to check on a diesel engine than does it have fuel in the tank. Haha. Definitely have learned a lot over the past couple years working on these old trucks. Thanks for watching!

[@dieselgypsy1100]

@@cfnevada I found the most effective way to bleed those 2 strokers is to find the highest fuel line going into (or out of) the head and fit a small vacuum pump into the line and suck the air out. I put a small ball valve on a T into the line and then I had a large syringe to make the vacuum. It was the best solution I found to get the heads bled out. Looking forward to your Will-it-start video on this!

[@cfnevada]

@@dieselgypsy1100 large syringe! That’s smart. I’ll have to pick one of those up and have in my tool box.

[@bruceschweigert6457]

6V 53 different valve covers from 71 series

[@keithhill9138]

I can tell you two are rookies at trying to start a diesel that has been sitting for a long time. 20:21

[@cfnevada]

🤔

[@Joe-sc9fy]

Well ⁉️1973 or 1963 ⁉️

[@cfnevada]

1973 GMC

[@rexgratteaux8655]

ETHER