yeah that looks just about exactly like what I have going on... I'll take a pic tonight. Is that the oem shroud?
Builds 1990 LJ78 in Montana
- Thread starter AirheadNut
- Start date
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FJBen
SILVER Star
Yes oem shroud. The only think I wonder is how much room you have depth wise.
I have nothing like that depth. Barely 3" from the inside face of the rad to the bolts on the power-steering pump sprocket
FJBen
SILVER Star
Yep.
Yeah not sure that will work you would for sure have to custom shroud it. I will have to measure how deep the fan/clutch is
Yeah not sure that will work you would for sure have to custom shroud it. I will have to measure how deep the fan/clutch is
- Thread starter
- #225
Great to see that the Prado is back on the road! Hopefully the cooling issues don't end up being too much hassle to fix. I'm going to be back in Bozeman starting next week, it would be great to meet up some time and maybe do a little wheeling.
Hell yes! I'll shoot you a PM
My impromptu rad-plug oring fix seems to be holding ok. I went ahead and ordered a replacement plug through the toyo dealer in Bozeman. Been having all kinds of weather this week, and the trucks been doing great. It really does shine when things get icy and rough. All of my other trucks, the forerunners, the fj etc.. all dance and skate on these ratty county maintained dirt roads, but my lj is not a dancer or a skater. Here's a vid from earlier this week when we had 30-40mph cross-winds, icy dirt roads and some snow-drift. Inside my 78 you don't feel any of it. May as well be a lazy summer drive.
Today we had super nice weather, so we took a drive down to YNP to check out the new north entrance road. I didn't realize this, but they took what used to be that old jeep trail west of the entrance road that used to come out back behind the police station in mammoth and paved it, and re-routed it so it comes out more or less where the old road used to. Super nice day, truck ran great.
Today we had super nice weather, so we took a drive down to YNP to check out the new north entrance road. I didn't realize this, but they took what used to be that old jeep trail west of the entrance road that used to come out back behind the police station in mammoth and paved it, and re-routed it so it comes out more or less where the old road used to. Super nice day, truck ran great.
Took the truck Ice Skating this weekend up the boulder road. Had a great trip.
Had a problem with the alternator over-charging and otherwise acting unregulated (varying directly as a function of rpm speed). I'm externally regulated. I think maybe the three-wire connection coming off the back of my alternator isn't making a good connection on the voltage-sense wire. Need to pull it all apart and figure out what's going on.
Had a problem with the alternator over-charging and otherwise acting unregulated (varying directly as a function of rpm speed). I'm externally regulated. I think maybe the three-wire connection coming off the back of my alternator isn't making a good connection on the voltage-sense wire. Need to pull it all apart and figure out what's going on.
Yeah, pretty sure I have a bad voltage regulator. My alternator situation, like everything in the truck, is a bit murky. The shop that did the 13bt swap (landcruisers direct) left me with what looks and acts exactly like a duralast a14681, however, that alternator claims to be internally regulated in the specs, and I have an external reg. The external reg that was in the truck after the engine swap was the mechanical sort with the two coils inside. This reg melted down and killed my battery in a matter of months, and I replaced it with one of those in551 clones off ebay. That's been running fine for years, but with the ensuing engine rebuild and etc... the truck has only actually been operational for maybe 6 months run-time.
To thicken the plot, I had the truck at Mike Dadja's shop in Dallas back in 2018 and one of the things he pointed out was that the alternator was internally regulated, and there shouldn't be an external reg on it.. I, with many other things to prioritize, continued to focus on getting the truck mechanically sound and left the external reg in, figuring if it wasn't (yet) broke, why fix it.
So now it's broke, and with me thinking about a dual electric fan setup to help with the water temps, running off-road lights, thinking about a dual battery setup, winch etc.. etc.., I would really like to replace the alternator with something internally regulated and closer to 100 amps. Can anyone recommend a replacement aftermarket alternator that'll fit the a14681 bolt-pattern and drive belt, has the vacuume-pump spindle, is internally regulated and has decent amperage?
To thicken the plot, I had the truck at Mike Dadja's shop in Dallas back in 2018 and one of the things he pointed out was that the alternator was internally regulated, and there shouldn't be an external reg on it.. I, with many other things to prioritize, continued to focus on getting the truck mechanically sound and left the external reg in, figuring if it wasn't (yet) broke, why fix it.
So now it's broke, and with me thinking about a dual electric fan setup to help with the water temps, running off-road lights, thinking about a dual battery setup, winch etc.. etc.., I would really like to replace the alternator with something internally regulated and closer to 100 amps. Can anyone recommend a replacement aftermarket alternator that'll fit the a14681 bolt-pattern and drive belt, has the vacuume-pump spindle, is internally regulated and has decent amperage?
We are back in Texas. So the truck made a full texas -> montana -> texas circuit, which is amazing progress engine-wise. We need an intercooler, custom rad shroud, bigger internally regulated alternator, and I might think about re-gearing the diff to 410's, but we are FINALLY road worthy again (that only took 5 years). I should maybe start a things to consider before you entrust your rig to somebody for an engine-swap thread
Spent the first night in Wyoming, at an LDS-run camp outside muddy-gap. Temps in the 20's and 30 mph winds, it was a noisy night but we were nice and cozy. I Forgot to get a pic with the tent up, but took these on the way out..
Second night we spent in sugarite canyon NM, temps in the teens, and our breath froze on the inner wall of the tent, but still cozy in our down bags.
We'd planned on doing a third night in caprock canyon in texas, but we cut it short and headed on home when we found out rain was on the way
Spent the first night in Wyoming, at an LDS-run camp outside muddy-gap. Temps in the 20's and 30 mph winds, it was a noisy night but we were nice and cozy. I Forgot to get a pic with the tent up, but took these on the way out..
Second night we spent in sugarite canyon NM, temps in the teens, and our breath froze on the inner wall of the tent, but still cozy in our down bags.
We'd planned on doing a third night in caprock canyon in texas, but we cut it short and headed on home when we found out rain was on the way
- Thread starter
- #231
Glad to hear you made it safely and uneventfully back! Sorry to have missed meeting up while you were in Montana, hopefully we can make that happen sometime.
So I've swapped my alternator to a Isuzu NPR, which puts out 110 amps, and has a compatible vacuum pump on the back. Had to do a very little amount of custom fab work to make it fit. Details in this thread..
I've had the truck out for a pair of 100mi drives, to see the alternator situated, and on the way home from the second one yesterday sprung an oil leak on the return line. Pics below. I think this is part number 90923-02081.. looks discontinued. Advice welcome.
I've had the truck out for a pair of 100mi drives, to see the alternator situated, and on the way home from the second one yesterday sprung an oil leak on the return line. Pics below. I think this is part number 90923-02081.. looks discontinued. Advice welcome.
- Thread starter
- #233
You should be able to get a new hose made up at a local hydraulic or heavy equipment repair shop. I had a new hose made for my turbo oil return, they were able to reuse the original turbo end and crimp on a new hose.
What @AirheadNut said... and it would be significantly cheaper this way too.
In the meantime, as a temp fix for something like this is to cut the hose a little shorter to get rid of the split (if it is long enough) and re-attach or I have used additional clamps on worn hoses while waiting for the new ones to come in.
In the meantime, as a temp fix for something like this is to cut the hose a little shorter to get rid of the split (if it is long enough) and re-attach or I have used additional clamps on worn hoses while waiting for the new ones to come in.
I'd be curious if the Vacuum Pump Oil Outlet Hose (90923-02081) has different fittings or length only vs the Vacuum Pump Oil Inlet Hose or the hoses from a 2H for example. I don't want to pull hoses off of my 13BT or 12HT
Want to measure your hose length and ID of the 'banjo' fitting? I suspect we have a 2H/12HT or Oil Inlet hose that could be modified to fit.
unfortunately I don't have the space.. I might chop it down even further, and get me a hose-joiner until I can find a ac/hydrolic shop with the right crimper
probably a dumb question, but how do I ID the banjo fitting? I _think_ it came off with a 19mm wrench? I'll double check when I'm back out there..I'd be curious if the Vacuum Pump Oil Outlet Hose (90923-02081) has different fittings or length only vs the Vacuum Pump Oil Inlet Hose or the hoses from a 2H for example. I don't want to pull hoses off of my 13BT or 12HT
We would need this measurement: (red)
(I think the fitting is the same based on the bolt and crush washer use. Therefor once we know the length, I bet we have a solution we could ship today)
FJBen
SILVER Star
I had the same issue happen last year I think. I found a local shop who built it in a day. Was like $45.00 they just reused my ends.
It’s in my thread somewhere…
It’s in my thread somewhere…
So it turns out the oil return line on this alternator is 1/2" and my oil hose is 3/8".. I didn't notice before because I was working by feel with the alt installed. With the replacement all new and tight I couldn't get it on there, so pulled the whole alt and saw my problem. So got a step-up coupler and a couple hose-clamps and threw those on it for now until I come up with a better plan. I've noticed banjo to threaded adapaters on amazon, maybe I'll eventually go with one of those.
Amazon product ASIN B07R46CWN2
Amazon product ASIN B07R46CWN2
