RufusTheDufus
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- #81
It is very similar but it's different enough that you can't use the 2H gaskets.
Budget H diesel turbo buildup
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RufusTheDufus
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- #82
I've got about 1500 miles on the engine now since redoing the head gasket. Boost is set at 9 psi max. Pyrometer reads 850 degress F pre-turbo when cruising 60 MPH on flat ground in 5th gear. I've had it up to 1,000 pulling a long hill in 4th. So that leaves me some room to turn the fuel up if I want to. I doubt I will. I'm getting and average of 17MPG. Running on 33 x 9.5 with 4.10 gears. Compression is 380psi to 400psi across all 6 cylinders.
RufusTheDufus
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- #84
I don't think I'll ever end up using it. Do you want it?
The whole point of bugging you to do it is that I dont have to any work!! 
I'm good, no time for another project, but thanks.
I'm good, no time for another project, but thanks.
Power gain
Hello Rufus,
After the "going turbo" experince, could please provide an aproximate of the power gain of your H engine with turbo?
I know it is difficult calculating a definitive number without running a bench test, but being this a slow engine, a power difference is easily noticed. I can tell this by my own experince driving a stock H engine on my HJ45 Pickup.
Regards,
Thirteen
Hello Rufus,
After the "going turbo" experince, could please provide an aproximate of the power gain of your H engine with turbo?
I know it is difficult calculating a definitive number without running a bench test, but being this a slow engine, a power difference is easily noticed. I can tell this by my own experince driving a stock H engine on my HJ45 Pickup.
Regards,
Thirteen
RufusTheDufus
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- #88
I have no idea what actual HP or torque numbers it puts out. It moves the Troopy along in 5th gear at 65MPH on 33s w/stock gearing quite comfortably with the boost set at 6 to 7 psi. (and that's with the extra weight from all of the camping/expedition gear installed too.)
It's the difference of driving a tractor vs. an old diesel pickup truck.
It's the difference of driving a tractor vs. an old diesel pickup truck.
RufusTheDufus
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- #89
Adding a little more info. I had very little time driving the H engine normally aspirated since I had a bad cylinder. I did the turbo at the same time that I did the pistons and rings. So I don't have much baseline "before" experience prior to gauge the improvement the turbo made.
RufusTheDufus
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- #90
It's turning out that the H might not be the best platform for a turbo. I'm replacing the headgasket again.
This is what an intermittent head gasket failure looks like
I had a custom copper gasket made by the folks at Cometic. I went with .063" thickness which is about .008" thicker than the gasket I had on the engine. Hopefully it lowers the compression ratio slightly. I could calculate the decrease but I don't have my FSM handy at the moment.
I searched for replacement head bolts. The stockers are M13x1.5. ARP and others don't do M13 head bolts or studs. Bummer.
At least this time I do have an M13 tap to chase the threads. I'm surprised how much gunk came out of some of the holes. Third time is a charm. (And less stupid than the previous two times that I didn't chase the threads.)
This is what an intermittent head gasket failure looks like
I had a custom copper gasket made by the folks at Cometic. I went with .063" thickness which is about .008" thicker than the gasket I had on the engine. Hopefully it lowers the compression ratio slightly. I could calculate the decrease but I don't have my FSM handy at the moment.
I searched for replacement head bolts. The stockers are M13x1.5. ARP and others don't do M13 head bolts or studs. Bummer.
At least this time I do have an M13 tap to chase the threads. I'm surprised how much gunk came out of some of the holes. Third time is a charm. (And less stupid than the previous two times that I didn't chase the threads.)
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Sorry to hear about the bad luck
RufusTheDufus
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- #92
FWIW, I'll be parting out this engine soon.
So the copper gasket didn't work out either or what?
RufusTheDufus
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- #94
Don't know if it's the gasket. I haven't taken it apart. At this point I don't care. I'm sick of diagnosing cooling troubles with this engine. The problem is the worst it's ever been. No bubbles at idle but it will blow a half gallon of coolant out the radiator cap in a half-mile of driving. It's bad enough that I no longer feel like fixing it.
I have a turbo 3B that's going into the truck. I guess it will be a BJ45 soon. I've already fabbed up a crossmembber and mounts for the H55. (The H didn't need a crossmember under the transmission because it used the older style bell housing rear engine mounts.) I like the idea of my three Cruisers being B series engines with common parts, better reliability and hopefully fewer headaches.
I have a turbo 3B that's going into the truck. I guess it will be a BJ45 soon. I've already fabbed up a crossmembber and mounts for the H55. (The H didn't need a crossmember under the transmission because it used the older style bell housing rear engine mounts.) I like the idea of my three Cruisers being B series engines with common parts, better reliability and hopefully fewer headaches.
The dirty old H motor cracks heads often enough without a turbo. You've persevered more than I would've.
RufusTheDufus
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- #96
I think it's a cracked block. The head was checked for cracks when I had it resurfaced before installing the copper head gasket.
Hmm.... I dunno man, seems like a tall order to get a crack like that on a sleeved engine. The sleeves are probably uncrackable so its hard to imagine how that'd work.
Bummer.
RufusTheDufus
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- #98
I did overheat the engine on the freeway.
Its a cracked head , only way to really look for cracks in magnuflux , where u look visualt look for cracks with ultra violet with a magnatizer or spray that most engine places do , they cant trace internal cracks ,etc . In-direct or precumbustion hesd designs are renown for crackd heads , how much are new heads? Tho i heard 3b handle it better .
What are ur symtoms besides overheating ?
What are ur symtoms besides overheating ?
