Want to swap my 6.2 hard to start

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goldpack

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Joined
Jul 8, 2025
Posts
615
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Location
Adirondacks, NY
First Name
Donnie
Truck Year
1986
Truck Model
GMC C2500 Camper Spec.
Engine Size
350 with 350 3 speed
When I first picked up my CUCV, it was hard starting even in the summer it needed ether to get going. Since I use it as my plow truck, reliable cold starts were a must.
I ended up swapped in dual Group 34 batteries. Upgraded to larger battery and starter cables. installed a new gear reduction starter. replaced all the glow plugs. added fuel check valves — one between the fuel pump and filter head, and another between the filter head and injection pump to prevent drain-back. I also make it a habit to put in a fresh set of glow plugs before each winter, and ever since doing all this, I haven’t had a hard-start issue
do you also plug it in? (with a oil heater/ coolant heater/ external heating pad,
....or just a plain old incandescent mechanics drop light underneath it like a old diesel farm tractor )
 

aasleson

Full Access Member
Joined
Mar 27, 2025
Posts
139
Reaction score
603
Location
Minnesota
First Name
adam
Truck Year
1986
Truck Model
k30
Engine Size
6.2
do you also plug it in? (with a oil heater/ coolant heater/ external heating pad,
....or just a plain old incandescent mechanics drop light underneath it like a old diesel farm tractor )
I just have a single block heater in it and I plug it in when I know im going to need it but it has started without being plugged in well below freezing before
 

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