![]() |
Register or Log In To remove these advertisements. |
|
|
![]() |
|
Thread Tools | Display Modes |
![]() |
#1 |
Registered User
Join Date: Jun 2010
Location: Jefferson, MD
Posts: 2,397
|
![]()
Im getting real close to selling this pile o' crap. Don't get me wrong, I like the idea of owning a CUCV, but this is ridiculous. First, it was the leaky injection pump that I replaced. After getting it back together correctly and it not starting, I sent it to the shop for them to get it timed. As it turns out I static timed it perfectly without even trying.
That was the good news. The bad news from the shop was that I have only 1 cylinder with compression above 100psi, I have a broken timing chain (explain that one to me, the stupid truck ran before I took the injection pump out), and my lift pump may or may not be working. Not that they could tell, since the injection pump wasn't turning due tot eh broken chain. Fed up.
__________________
'68 Dodge Dart 270, 225, 904, 2.76--"Lucy" 1996 Gmc 1500 Z71, 350, 4l60e, 3.73s 1995 Jeep Wrangler Rio Grande 2.5, AX5, 4.10s 1989 Toyota Pickup 22re, auto, 3.73 |
![]() |
![]() |
![]() |
#2 |
Robert Olson Transport
![]() Join Date: Oct 2002
Location: recent transplant to NC USA
Posts: 20,287
|
Re: Fed Up With MY CUCV...
I feel your pain. I had two 1986 CUCV M1008s. One of my trucks took forever to get the glow plus to work right now that I did the mod on em they work ok.. the other truck looked like a million bucks but I couldn't figure out the glow plugs there then like yours it stopped running well I put the old one on craigslist and this kid came ( im hoping hes gonna sign on here) his dad and him decided to make an offer on my non running million dollar looking truck that was what I had into it so I sold him the nice looking one. Getting back to your problem I would first do some research on steel soldiers .com they have all kinds of tms and parts books etc plus it gives you the part numbers so that you can try to find the correct gm parts.. Also if you decide to go with a used motor PM me and I can give you a guy in PA who is also a member here who has lots of parts for these trucks.. Also you may wanna PM Gerry GM72K10 maybe he can assist you
the last thing im going to say is make sure you take the truck to a competent diesel mechanic.. many claim to be yet so few seem to know their glow plug from their CDR valve . I have had several guys try to bluff their way trying to fix mine and it cost me more in the long run than if I spent the money on the real truck shop good luck and let me know what happens
__________________
Bob 1951 International running on a squarebody chassis "If a man's worth is judged by the people he associates himself with, then i am the richest man in the world knowing some of the fine people of this board" http://67-72chevytrucks.com/vboard/a...t.php?f=25&a=9 (you can review the site rules here!) PM Me for your vehicle/parts hauling needs in the North East US or see my Facebook page Robert Olson Transport Live each day to the fullest.. you never know when fate is going to pull the rug out from under you... I hate cancer!! |
![]() |
![]() |
![]() |
#3 |
Account Suspended
Join Date: Apr 2009
Location: hazard, ky
Posts: 1,674
|
Re: Fed Up With MY CUCV...
covert it to a v8 or cummins.
|
![]() |
![]() |
![]() |
#4 |
Windy Corner of a Dirty Street
Join Date: Jun 2003
Location: Pueblo West, Colorado
Posts: 2,926
|
Re: Fed Up With MY CUCV...
Sorry for your frustration. I bet it is frustrating and expensive if you are paying a shop to do this work for you.
The number 1 reality is if you’re going to own an old truck the only way you can really afford to have them and build them is to do the work yourself. That rules out any BS like all a sudden the truck needs a timing chain not to mention the ridiculous cost to pay someone to do the work you should be doing. Spending money while they spin their wheels equals more frustration for you. Second, 6.2 and early 6.5L engines are pretty simple and actually pretty reliable once you get to know them (not Cummins-like durable but, the 6.2L was pretty reliable). Look at the military…..We all respect our men in uniform but you have to admit a great number of the gomers in the field working on 6.2L engines were not the sharpest knives in the drawer but yet they were able to keep them running. The more you study the manual and work on it yourself you will find they are very simple. Also remember the truck is OLD. While it may be an low mileage CUCV, it is still OLD. Old stuff needs attention. Good luck!
__________________
Current vehicle collection: 1978 Chevrolet K10, 8.1L, NV4500, NP205 1989 Chevrolet Suburban, 8.1L, NV4500, NP241 1993 Chevrolet C1500 Sportside, TBI 7.4L, 4L60E 2001 Chevrolet K2500HD, Ext Cab, SWB, 8.1L, ZF 6 speed 2014 Chevrolet Impala LTZ 3.6L Vortec 8.1L because life is too short to tolerate underpowered vehicles
|
![]() |
![]() |
![]() |
#5 |
Registered User
Join Date: May 2010
Location: Mountain House, CA
Posts: 555
|
Re: Fed Up With MY CUCV...
If you timming chain is bad your compression will be off won't it?
__________________
My Chevy habit is paid for by Ford diesels... Here is my SLOW LS install: http://67-72chevytrucks.com/vboard/s...55#post6456355 Caliper Rebuild: http://67-72chevytrucks.com/vboard/s...d.php?t=613748 Upper Control Arm Bushings: http://67-72chevytrucks.com/vboard/s...d.php?t=616974 IG mattcrp1 |
![]() |
![]() |
![]() |
#6 |
Account Suspended
Join Date: Apr 2009
Location: hazard, ky
Posts: 1,674
|
Re: Fed Up With MY CUCV...
it could cause the valve not to close or open so yes it could. im sure the whole thing will need rebuilt still. timing chain usually means the valves smack the piston.
|
![]() |
![]() |
![]() |
#7 |
Senior Member
![]() Join Date: Mar 2013
Location: Ann Arbor, MI
Posts: 1,023
|
Re: Fed Up With MY CUCV...
As mentioned above, Steelsoldiers.com. Sign up and after that use the search function to diagnose. I have Three CUCVs and just like anything old they need attention every now and then but mileage and fun to drive factor is right up there with a gas V8 (my opinion). If it ran before it will run again....study steelsoldiers and you'll figure it out.
|
![]() |
![]() |
![]() |
#8 | |
Registered User
Join Date: Jan 2011
Location: Maryfield, Saskatchewan
Posts: 93
|
Re: Fed Up With MY CUCV...
Quote:
These engines have 380-400 psi compression when new/rebuilt. At 140 or less they basically won't start. I would be pulling the heads and having the valves checked out and checking the pistons for damage/cracks. I am sorry to hear this has happened to you. Good luck with the rebuild. |
|
![]() |
![]() |
![]() |
#9 |
K5Camper
![]() Join Date: Mar 2004
Location: Pueblo, CO
Posts: 1,513
|
Re: Fed Up With MY CUCV...
Larry has a valid point. CUCV's are over 25 years old now. Something smells fishy about the shop you took it to as well. If the timing chain broke how in the heck are they able to tell you the pump is in time? I find it would be pretty lucky to have the timing chain break at just the right spot you can install the pump in perfect timing.
I'd invest in the factory service manual for the correct repair details to aid in diagnosis of your problem. Steel soldiers is a good info source too. Your increase in knowledge will stop the need to farm out the work and give some guys an opportunity to put the screws to you.
__________________
Rob Z. 1975 K5 350/465/205/D44/12b 4" lift on 35's- RIP 1991 K5 8.1L/NV4500/241/D44/14b FWC Camper |
![]() |
![]() |
![]() |
#10 |
Registered User
![]() Join Date: Oct 2013
Location: lousiville Ky
Posts: 2,649
|
Re: Fed Up With MY CUCV...
Glow plug issue mine had glow plugs not working, also. Do not remember exactly where on fire wall, I direct wired from battery with momentary switch inline to a terminal block that powered the glow plugs. That fixed my problem. Depending on temp I would run them for 8 to 12 seconds. Try starting it for for very short time ( equivalent to warm start). If it did not start I would try another 6 to 8 seconds. It almost alway started on second try. For mine I found you did not want to crank it for more then 1 to 2 seconds. Cranking for several alway messed it up and it would not start that day. Mine always started very quickly. Cold or hot. It has like 35k now. As other stated above, once working they usually last a long time. I have had mine for 12 years with no problems once I got it running. Learning starting procedures for me was most important and keep batteries well charged.
Just a note if you need second alternator, they were also used on 454 ambulance for that time period. Think mine came from Auto Zone. Hope thing go better for you soon. Les |
![]() |
![]() |
![]() |
#11 |
Next!
Join Date: Jan 2003
Location: Eastern Pa.
Posts: 2,479
|
Re: Fed Up With MY CUCV...
Ahhh I feel your pain. CUCVs are not for the light of heart.
__________________
86 K30 CUCV M1028A1 86 K30 CUCV M1028a2 dually 86 K30 C&C 6.2 4:56s, 4M, 11,000 gvw, ex fire truck, now lowboy dump More square bodies and CUCVs than I care to admit to 2020 Silverado K3500HD Work truck |
![]() |
![]() |
![]() |
#12 |
Registered User
Join Date: Jun 2010
Location: Jefferson, MD
Posts: 2,397
|
Re: Fed Up With MY CUCV...
Thanks for the comments, guys. I'm a little more clear-headed about it now...looking back I think I know when the timing chain broke as I was turning the engine. I already had gotten the pump in and I distinctly remember hearing a quiet pop, then the engine turned a lot easier. Had to be it. Yes, that would explain the lack of compression as well, and likewise, I'm unfortunately well aware that I'm going to face valve/piston contact now.
![]() I guess now the question is, is it actually worth it to put another motor in it? How easy is it to swap another 6.2 into it? I mean, it should go pretty smoothly, but what things will I need to watch out for? @old Rusty C10, I will be PM'ing you about your guy in PA with the motors, thanks.
__________________
'68 Dodge Dart 270, 225, 904, 2.76--"Lucy" 1996 Gmc 1500 Z71, 350, 4l60e, 3.73s 1995 Jeep Wrangler Rio Grande 2.5, AX5, 4.10s 1989 Toyota Pickup 22re, auto, 3.73 |
![]() |
![]() |
![]() |
#13 |
Robert Olson Transport
![]() Join Date: Oct 2002
Location: recent transplant to NC USA
Posts: 20,287
|
Re: Fed Up With MY CUCV...
Im thinking that if you get a used motor just for the fun of it you should prolly do a timing chain before you install it in the truck
__________________
Bob 1951 International running on a squarebody chassis "If a man's worth is judged by the people he associates himself with, then i am the richest man in the world knowing some of the fine people of this board" http://67-72chevytrucks.com/vboard/a...t.php?f=25&a=9 (you can review the site rules here!) PM Me for your vehicle/parts hauling needs in the North East US or see my Facebook page Robert Olson Transport Live each day to the fullest.. you never know when fate is going to pull the rug out from under you... I hate cancer!! |
![]() |
![]() |
![]() |
#14 |
Registered User
Join Date: Jan 2011
Location: Maryfield, Saskatchewan
Posts: 93
|
Re: Fed Up With MY CUCV...
cam.man67, did the timing chain break break before or after you installed the new pump?
|
![]() |
![]() |
![]() |
#15 |
Registered User
Join Date: Jun 2010
Location: Jefferson, MD
Posts: 2,397
|
Re: Fed Up With MY CUCV...
After. I think it went as I was bleeding the air out of the injector lines.
__________________
'68 Dodge Dart 270, 225, 904, 2.76--"Lucy" 1996 Gmc 1500 Z71, 350, 4l60e, 3.73s 1995 Jeep Wrangler Rio Grande 2.5, AX5, 4.10s 1989 Toyota Pickup 22re, auto, 3.73 |
![]() |
![]() |
![]() |
#16 |
Registered User
Join Date: Jan 2011
Location: Maryfield, Saskatchewan
Posts: 93
|
Re: Fed Up With MY CUCV...
I would take a close look at the pump itself. I am not saying it's impossible, but there are lots of 6.2s around with 400 000K + miles on them with out being rebuilt including the timing chain.
Anything is possible, but I would wonder if something locked up the pump causing the chain to brake while you were cranking it. |
![]() |
![]() |
![]() |
Bookmarks |
|
|