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What did you do with your GMT400 today...or yesterday....

My engine is a 6.2 N/A 599 block bored 30 over. 6.5 heads. Mine didn’t have ports for either the OPS in the valley or front of the block for turbo oil feed. If the one you’re looking at is the same, you’ll need to make a T-Block fitting for the OPS and Turbo Oil Feed line using the oil port at the back of the block. I used brass to ensure proper ground for the OPS.
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Yeah, that is the same as the cracked 6.2 that i picked up a couple year ago. there is some sort of restrictor fitting in the block there that's tee'd off to the turbo on it. did you need a restrictor on there not to get full flow or pressure to the turbo?
 
No restrictor was used. You're the first one to mention it. Given the OPS port isn't restricted and, so far as I know, the Turbo's Oil Feed Line on the 6.5 isn't restricted given the amount of oil that came out of my old 6.5 engine's port when left open once (no I don't want to discuss it).
 
Would the pan on my current 6.5 fit on that block? I have the other 6.2 that has the cracked main webs also that is complete with a pan. hoping this engine turns out good, once I get it all together and ready to install, I can post up all the remaining parts if someone needs them.

if the pan that's on the engine will work, I will leave it and the current 6.5 intact, inspect the 6.5 to see if it's a viable rebuilder. might be good to fix up for a spare drop in engine.
 
I guess Once I get the engine home and all, I need to start making plans to have the IP rebuilt and ready. not sure who I should use. if all works out, I would like to get one rebuilt, then later get the one that's on the 6.5 done too. with this engine coming home with me, I will have a total of three DB2 IP's. wonder if someone can rebuild one and have it ready for the 6.2 and maybe have some instructions on what to do or how much to turn the fuel screw so it can be spec'd for a 6.5 later down the road.

Maybe it would be cheaper on my end to send all three in to get two good ones back with them keeping one for them to rebuild and sell.
 
Would the pan on my current 6.5 fit on that block? I have the other 6.2 that has the cracked main webs also that is complete with a pan. hoping this engine turns out good, once I get it all together and ready to install, I can post up all the remaining parts if someone needs them.

if the pan that's on the engine will work, I will leave it and the current 6.5 intact, inspect the 6.5 to see if it's a viable rebuilder. might be good to fix up for a spare drop in engine.
IMO you’re chasing a money pit because of the low initial purchase price.
 
Just heard back from the guy on marketplace, plan is to head out there in the morning, gonna have to pull it, but he's also giving me the trans too. it has a TH400 behind it.

don't really have use for it atm, but if, it's good, it's all mechanical so it will work on just about anything including my son's truck if he decided to go automatic on his 68 chevy!
 
Just heard back from the guy on marketplace, plan is to head out there in the morning, gonna have to pull it, but he's also giving me the trans too. it has a TH400 behind it.

don't really have use for it atm, but if, it's good, it's all mechanical so it will work on just about anything including my son's truck if he decided to go automatic on his 68 chevy!
Pull it then drop the pan, inspect them main webs before dolling out that cash.
 
Well we have returned from picking up the engine and trans. when I arrived they were already working on pulling it out. all I helped with was lifting and pulling! got it loaded into my truck, tied down and headed back home.

My son and I set things up to get it down, I had to split the trans from the engine in the back of my truck simply because I was afraid that my homemade A frame built out of an old swing set and some land-scape timbers wouldn't hold up to the weight of both.

Left the trans in the back of my truck because I didn't feel like lifting it out.

I started looking over the engine real good and was honestly kinda surprised that there wasn't any oil, grease, or really anything caked on the engine anywhere. No evidence of anything leaking, only the valley was packed full of old leaves and acorn nuts as if a pack rat was there. I cleaned off all the wires and harness, removed the AC compressor and top rad hose so I could fit it through the door of my garage. pulled out the power washer and sprayed off the engine. It washed off clean mainly because it was just mouse house that was on the top, everything else was clean. we sat it down on a furniture dolly and wheeled it into the garage floor.

Once I got it in there I pulled all the glow plugs out, only two had some bulging and carbon build up, the rest came right out easily. I very carefully worked the two that were kinda stuck and got them out as well. all 8 were AC Delco branded but I couldn't read the part numbers on them. looking at the two I don't think they were bulged but had a lot of carbon build up.

Looking at the engine, I found the casting numbers and a date code right below the casting number, also where it's stamped "GM 6.2l D" on the front side of the passenger side.

This engine looks like it hasn't been in that old burb long. I also noticed that there is markings on the top side of the trans case that look like dates written in marker. one date reads 2-12-97 the other reads 2-17-97 so the trans at least has been rebuilt not too long ago. I got a little back story on the burb, it was owned by another fella the guy knows which he smoked. He was driving and flicked a cigarette which apparently landed in the back somewhere. he parked the burb inside his garage but later noticed smoke coming from within the garage. he flung open his garage door which ignited it all to a blaze. the fella actually went in there and drove the burb out while it was on fire to save his house. the fire department came and put the burb out. it's sat ever since (about 10 years) until recently his friend bought it for the frame and started parting it out.

He said his friend only used the burb at the time for family trips and vacations and to his knowledge it only had about 147k miles on it, though you could see it had been up north seeing all the lower quarters rusted out.

I didn't get to do any inspecting on it there, and he seemed honest plus the area he was in was a really nice neighborhood. I took his word and off we went.

The block is completely painted GM blue from when it was installed, not sure if the engine was rebuilt or maybe an actual GM crate reman of the time. It doesn't look like it was what I call a "craigslist rebuild" with a rattle can, but you never know.

Anyway after I got all the GP's out, I went to spin the crank with my ratchet and quickly discovered a hard spot. sprayed some lube in each of the GP holes and started working it. It would rotate almost 360 degrees in both directions until you felt that hard stop. it took a couple times rotating it back n fourth stop to stop then it suddenly broke free and then rotated perfectly fine. I think all that was stuck was a piece of carbon. there is no hard spot at all now, doesn't even feel stiff in that area. I also noticed that with a slight movement of the crank you can really hear air moving in and out of the GP holes. I'm being a little optimistic!

I need to get the other 6.2 that's cracked off my engine stand and this one mounted on it for a full inspection, but here are some photos.

I also took photos of the thermostat crossover, it's way different that what I have seen before. also there is a sensor that is threaded into the rear coolant block off plate I have no idea what it is. I have the connector for it on the harness I pulled off along with the fuel filter that was mounted on the firewall, it's a square box, something else I have not seen before, looks to be factory though with all the connectors going into the harness.

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And the cast number with date code. I thought it kinda odd to have a date code like this, not unless this was one of those GM reman units or somesuch. were these diesels available back in 81? the burb is an 84.

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Finally got around to installing / swapping out the return fuel lines on the injectors. To re-hash, I purchased the Delphi Injector installation kit and the return line hose failed several times on the 5 and 7 injectors. Failed as in split apart.

I noticed when replacing the upper intake that there were two bolt holes on the lower intake that weren't going to hold 17lbs torque so I had planned to do HeliCoil inserts to correct that issue. Well, It wasn't until I had finished the process that I realized that the M8 kit I had in the tool box was actually an M10 kit. I have a kit for M6 in the box too and, well, 'No Excuse Sir.' Heck, I didn't even have an M8 kit...Yup, face palm.

I have another lower intake only one of the ears is busted from someone not getting the return line out from under the back corner of #7 on a previous reinstallation.

I found these M10 x 1.5 - M8 x 1.25 serts / thread repair inserts by Patkil on the Jungle Site and will sort out the boo boo on Tuesday. I got them in two lengths, 15 and 25mm for the corners and the middle holes.
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Bill offered to send me one of the few he has laying around but, with even crappy looking units going on E-Bay between $260 and $400 plus shipping, he could make some money off those. I'm just going to own this one. Another friend has offered to weld up the broken ear on the spare but, being between moves, his gear is spread out between two locations so that's on hold. So, in the meantime, I'll just deal with the repaired units...until my CDO (OCD with the letters in the right order) takes over reason and practicality.
 
And the cast number with date code. I thought it kinda odd to have a date code like this, not unless this was one of those GM reman units or somesuch. were these diesels available back in 81? the burb is an 84.

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According to my search, GM started installing the 6.2 in their line up in 1982. 1981 casting would correct in order to meet production demands.
 
So this must be a very early 6.2

btw I also got all the brackets and pulley setup for it, all v-belt drive. donno if that is a good thing or not, but I do prefer the old belt systems over the serpentine setups. I also like those jumbo AC compressors too. I had one in my old el-camino back in the day, they can pump some frigid cold air!
 
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