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Sh*t hit the fan today on my way back from a weekend camping trip and I blew a head gasket. I was climbing a decent hill (but not the steepest/longest I encountered) on the trip home and noticed what sounded like a very minor exhaust leak. This even started before I got to the hill and was...

I’ve been tossing around the idea of a separate engine oil cooler and had a few questions: For those that have done it, did you still run the oil through the radiator first or bypass that and just do the standalone separate cooler? And if you did the standalone, what did you use/how did you...

I purchased/installed an aluminum Liland Global 850AA3R radiator from rock auto last year for my M1008. I noticed yesterday that the depth of the filler neck on the radiator cap is more than the OEM radiator. I believe OEM is .75", I haven't measured this yet to be exact but it is probably...

Over the course of my M1008 ownership, I've added a few additional electrical circuits for items such as radio, trailer brake controller, fuel filter heater, fuel pump, etc. Depending on load/need these were typically wired to their own relay or to the 12V block near the glow plug relay with...

Unfortunately my M1008 did not come with the factory jack and I want to obtain a replacement. I have seen used OEM ones for sale online, however, is there a better alternative that anyone has come up with? I'm not worried about it being original if it has better functionality. I typically...

Curiosity has gotten the best of me and figured if anyone would know it would be here, but why do the M1008s come with the NP208 transfer case vs the NP205? Typically everything else lines up with a standard civy K30 (which is inherently what the truck is), however for the biggest difference in...

Today while coming back from a long trip with the M1008 I noticed that the speedometer seemed to be running faster than normal. Usually it was 3-4 mph fast at 65 mph, however with a quick check of the gps it was showing 12mph faster. By the time I got home an hour later it was showing 20 mph...

So I started taking apart my 6.2 to determine what went wrong with my rebuild and part out what I can. I thought a head gasket went on it based on the white smoke and terrible running, however after looking at the first side I pulled off I’m not actually sure what I’m looking for. But something...

I’m pretty sure this is a dumb question but I’m going to ask anyways, is oil pressure at the drivers side plug (above the oil cooler lines) an accurate place to verify oil pressure? The reason I’m asking is all of a sudden my Autometer oil pressure gauge has been reading very low (0-10 psi)...

What would be the cause of a knock that comes about at a higher rpm (~1500) but then goes away after a few seconds at idle? I got my new 6.5 optimizer all hooked up and now am having this issue. I think it had a similar symptom when I first got it running at idle but after a timing change...

Well after the issues I encountered with my 6.2 block and failed rebuild I decided to purchase a new 6.5 Optimizer. I'd like to have everything I need on hand when it arrives so ideally it is a fairly quick swap and I don't have to wait for parts. I've heard that the few remaining bolts on the...

Well I finally got the truck put back together enough after putting on the new heads and turbo to hook the batteries and start it up to see how everything works. After bleeding the air out of the fuel system it started and ran great for about 5 minutes. Then all of a sudden it started running a...

I am in the process of adjusting the fuel screw on the injection pump. However, I am trying to remove the guide stud and it is putting up quite the fight. I’ve put a lot of force on it and it still hasn’t broke free, and now my allen is fitting loose. It’s not quite stripped yet but I don’t...

What is the thought on using this copper spray on head gaskets, specifically Mahle ones? A few manuals I have say not to use it on Felpro gaskets, but then some people seem to swear by it on whichever gasket they use. The gaskets are composite so technically copper spray is supposed to be...

I am trying to remove the plug from the block (above the oil filter) to use as the oil supply source for my turbo but it is putting up quite the fight, even after soaking for a few days in penetrating oil. A 1/4” drive extension doesn’t fit snug enough to be able to put a lot of force on and I...

As part of my turbo build I performed an inspection of the lower end of my block. It turns out I have I believe 3 cracks in the main bearing webs. All 3 are facing the rear of the motor on the outer bolts, 1 is on the 3rd from the front (middle) web, while the other 2 are both on the 4th. None...

I know there are a lot of threads on gauge conversions. And this is a new product so maybe no one has tried it yet. But LMC now has a gauge cluster for the 6.2 diesel. https://www.lmctruck.com/1973-87-chevy-gmc/gauges/cc-new-vintage-diesel-gauge-clusters Anyone install (or planning on...

I am in the process of adding a turbo to my 6.2 and am wondering which is the correct (or better) way to route the CDR valve. The CDR on a NA 6.2 pulls from the oil fill tube, through the valve, and into the intake manifold. The 6.5 CDR pulls from the p-side valve cover and into the intake...

I am in the process of obtaining parts for my 6.2 turbo upgrade. I plan on installing 6.5 heads as part of this along with a Quadstar Tuning Super 54 turbo (set for 8-10psi max). My question is, what would be the ideal injection pump (6.2 DB2 or 6.5 DB2) and injectors to match with this setup...

Today while I was under the truck I noticed a small oil seep from what looks to be holes drilled in the axle housing. It seems like these are from the factory as other axles have the same thing as well, and it feels like they’re plugged with some sort of sealant. Does anyone know what these are...