FAQ Thread for CUCV's

[Michael]

NEW type glow plug relay - Michael's Photos

The bid red wire goes on one big post and the two big orange go on the other.

The small blue is on the top small post and the small pink is on the bottom.

I don't think it makes any difference if you get them backwards since the two small wire energize an electromagnet which closes a connection to connect the two big wires. The above pictures was from a truck as it was released from the military.

In the pictures titled NAPA relay, I have run a large white wire to the 12 volt buss to bypass the voltage step-down resistor.

NAPA glowplug relay - Michael's Photos

[Dave Kay]

Originally Posted by Michael

Do not buy AC13G glow plugs. They are obsolete.

The correct direct replacement plug for the cucv is Wellman 070

I prefer AC60G which is what GM recommends for all civilian 6.2 and 6.5 engines.

I would like to comment on the recommendation for the Wellman gp's; here's photos of a set I just pulled from my newly acquired M1008. This vehicle has only been started twice since I got it and yes--- I've did the gp resistor bypass before I ever started it.

It's a bit difficult for my old eyes to read the numbers but I can see the last digits--- 70. As you can see the five gp's on the bottom of pic are swollen; that's 5-out-of 8. Lousy performance if you ask me.

Anyway, the reason I post this is because on the DieselPage site they recommend nothing but AC-60G's or another brand by Kennedy Diesel. I'm afraid that the old Wellmans' won't ever be put in my rigs again.

Meanwhile, I've replaced these Wellmans' w/AC60G's and after 5 secs of gp-time, this engine now fires-off as soon as I touch the ignition key--- LESS THAN 2 seconds!

[ralbelt]

Same thing here Dave, I replaced 1 year old wellman's with AC60G's, resupplied a new ST85 relay with 12V, and just a second or 2 from a dead cold 40 degrees, and she is up and running.

[Zero_cool]

does anyone know the part number for the front driver side axel shaft seal?
The big circle dust shield that keeps crap from getting into or out of the axel.
I just noticed that there is not one in there so i have nothing to compare to.
m1028 thanks

[Michael]

Originally Posted by Dave Kay

I would like to comment on the recommendation for the Wellman gp's; here's photos of a set I just pulled from my newly acquired M1008. This vehicle has only been started twice since I got it and yes--- I've did the gp resistor bypass before I ever started it.

It's a bit difficult for my old eyes to read the numbers but I can see the last digits--- 70. As you can see the five gp's on the bottom of pic are swollen; that's 5-out-of 8. Lousy performance if you ask me.

Anyway, the reason I post this is because on the DieselPage site they recommend nothing but AC-60G's or another brand by Kennedy Diesel. I'm afraid that the old Wellmans' won't ever be put in my rigs again.

Meanwhile, I've replaced these Wellmans' w/AC60G's and after 5 secs of gp-time, this engine now fires-off as soon as I touch the ignition key--- LESS THAN 2 seconds!

I would like to go on record as never recommending the Wellman plugs. My original post was edited by one of the moderators. A couple of us went round and round about the best plug to use and I finally got tired of it and quit posting. I have used AC 60G in both modified and unmodified trucks without problems. I did burn one set out in a truck that the relay was sticking and even then they didn't swell.

[Warthog]

Originally Posted by VTSteel

M1008 , water in fuel light is always on,

I have tried diesel dry and other dry gas liquids no responce. Truck seems to run fine?

Anyone have an idea of how to solve this issue

Thanks

Mike

Please delete this message and start a new thread. This thread is fo solutions, not new problems. Once you solve your problem you can post a "new" solution.

Thanks.

[CUCV85]

s603 Advance Auto Parts is the same as Napa st80 or st85 and is 1/3 of the cost!

Originally Posted by AJMBLAZER

One of the threads above references the NAPA GPR109 glow plug relay. This part is meant for pre-Powerstroke Ford diesels. It is $25 or so while the GPR110 which is very similar costs around $85. We're not sure what the difference is between the two but even the local NAPA couldn't tell me other than to say "$60 more". I used the 109 and so far, so good.

There are two small issues with using the NAPA Ford GPR109 relay, both of which are perfectly fixable.

1. The brackets on the stock relay are of a "north and south" orientation with one on the top and one on the bottom. The 109 has them in a sort of "north and west" orientation. All I did was put the north bracket in the stock hole and then drill a new hole below the stock lower hole to mount the west bracket with. I just couldn't turn it enough to use the stock lower hole without hitting the brake system stuff there to the right of it. Some people have reported they were able to get theirs to line up with the stock holes without trouble but I was unable to do that with mine. Might just be me.

2. The 109's larger studs use different threads than the stock relay's larger studs do. You will have to go out and find new nuts because of this. Minor but it is something to take care of before you're kneeling on the radiator shroud, stretched across the engine cussing.
The two smaller stock studs use the same thread as the 109's smaller studs so their nuts can be reused on the 109.
Note that this is for the original style relay these trucks came with from the factory. I do not know if the updated relay the military used was different.

[CUCV85]

The Wellman 070 are for the original 24volts down through the resistors. I use the O70's even after doing a bypass so that only 12volts are going to the 070's. It's Recommended that I use the Wellman 050's now that I have done the Resistors bypass and have true 12 volts going to my Glow Plugs. Don't be to quick to Sheet on the Wellman's because they are an outstanding plug and are much cheaper to buy on line than going to your parts store and paying 12.00 each for the ac 60 G plugs. Honestly keep in mind that once a Resistors bypass is done any plug will work Wellman 070 050 Ac 13 G Ac 60 G depends on what you want to pay there is NO difference in Performance!

Originally Posted by Dave Kay

I would like to comment on the recommendation for the Wellman gp's; here's photos of a set I just pulled from my newly acquired M1008. This vehicle has only been started twice since I got it and yes--- I've did the gp resistor bypass before I ever started it.

It's a bit difficult for my old eyes to read the numbers but I can see the last digits--- 70. As you can see the five gp's on the bottom of pic are swollen; that's 5-out-of 8. Lousy performance if you ask me.

Anyway, the reason I post this is because on the DieselPage site they recommend nothing but AC-60G's or another brand by Kennedy Diesel. I'm afraid that the old Wellman's' won't ever be put in my rigs again.

Meanwhile, I've replaced these Wellman's' w/AC60G's and after 5 secs of gp-time, this engine now fires-off as soon as I touch the ignition key--- LESS THAN 2 seconds!

[Michael]

Originally Posted by CUCV85

Honestly keep in mind that once a Resistors bypass is done any plug will work Wellman 070 050 Ac 13 G Ac 60 G depends on what you want to pay there is NO difference in Performance!

It is well documented that the AC 13G plugs swell and can be a real pain to remove. The AC 13G is the original equipment plug that was used when these trucks were new and is what is probably in the TM. You can still buy them but don't, they are obsolete. Autozone has AC 60G plugs for $8.99. I doubt if NAPA is much different.

[Warthog]

Please stop posting questions in this thread. It for SOLUTIONS, not questions.

You can find all the GM part numbers you will ever need in the Technical Manual Parts listings.

TM 9-2320-289-20p and TM 9-2320-289-34p

Also read the CUCV Wiki as the alternator part number from NAPA is listed