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  #1  
Old June 5th, 2011, 06:34 PM
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Alex Lapidus
1994 D90 ST #1716
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What should I do?

So about 30 minutes ago I was happily schlepping wood home from Lowe's to finish my daughter's tree house when I heard an enormous bang and smoke started pouring out from beneath the bonnet. Judging from the whole in the side of my engine, the enormous puddle of oil beneath the truck and the rod sitting on the road behind me, I'd say it's time for a new engine. I'm trying to see the opportunity of this dilemma and seeing as I have some time waiting for the tow truck, I thought I'd toss a few questions out into cyberspace.

Should I have my engine (1994 3.9 with 101K on the clock) rebuilt?
Should I purchase a rebuilt engine?
Should I get a diesel?
Should I get a larger engine (4.0, 4.6, etc)?
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  #2  
Old June 5th, 2011, 06:42 PM
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Dave McHenry
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[QUOTE=floyd650;285345]So about 30 minutes ago I was happily schlepping wood home from Lowe's to finish my daughter's tree house when I heard an enormous bang and smoke started pouring out from beneath the bonnet. Judging from the whole in the side of my engine, the enormous puddle of oil beneath the truck and the rod sitting on the road behind me, I'd say it's time for a new engine. I'm trying to see the opportunity of this dilemma and seeing as I have some time waiting for the tow truck, I thought I'd toss a few questions out into cyberspace.

Should I have my engine (1994 3.9 with 101K on the clock) rebuilt?
Should I purchase a rebuilt engine?
Should I get a diesel?
Should I get a larger engine (4.0, 4.6, etc)?


The hole in the side makes a huge problem for the rebuild.
Purchase a rebuild a quick and easy swap.
2.8 diesel makes a big difference if your going to keep the truck
4.6 is also an easy swap to do.
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  #3  
Old June 5th, 2011, 07:32 PM
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Doug Crowther
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  #4  
Old June 5th, 2011, 08:20 PM
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Mike Deery
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I am a big advocate for the 200tdi. Mine runs really nice, returns great mileage and the deisels generally will run for quite a long time. I think there is a 200 or 300tdi for sale on the site. There will, however be some engineering involved... motor mounts, intercooler, plumbing, exhaust, etc.
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  #5  
Old June 5th, 2011, 08:43 PM
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Danny
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if you don't care about fuel economy, I second the swap to another V8. 4.2 RRC being drop in over another 3.9 too.
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  #6  
Old June 5th, 2011, 09:02 PM
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Find a 4.2 have it gone through buy a cam lifters timing chain get heads surfaced everything else will swap over. Also a goodtime for anew radiator. Cheaper than a diesel and you'll be amazed at the outcome.
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  #7  
Old June 6th, 2011, 01:31 AM
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Alex Lapidus
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I am hanging onto this truck forever, so my number one priority really is reliablity and endurance. I don't think I am ready to convert to diesel just because I doubt that I would trust anyone but ECR doing the conversion, and I can't see shipping my truck across the country for it. So it comes down to replacing my 3.9 or tracking down a 4.2.

Are they equally reliable?
How much worse gas mileage can I expect from the 4.2?

Thanks!
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  #8  
Old June 6th, 2011, 06:59 AM
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I know a couple 4.2s with 200k plus. Gas mileage will always be shitty keep em cool and serviced they will last.
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  #9  
Old June 6th, 2011, 09:09 AM
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kevin
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Quote:
Originally Posted by floyd650 View Post
I am hanging onto this truck forever, so my number one priority really is reliablity and endurance. I don't think I am ready to convert to diesel just because I doubt that I would trust anyone but ECR doing the conversion, and I can't see shipping my truck across the country for it. So it comes down to replacing my 3.9 or tracking down a 4.2.

Are they equally reliable?
How much worse gas mileage can I expect from the 4.2?

Thanks!
No doubt ECR does outstanding work. However, the diesel conversion isn't beyond a lot of others to do if you keep it simple and the rest of the truck and drivetrain are in good working order.
On the other hand, if you don't have a real desire for a diesel and you are looking long term, I would find a shop that has a good reputation and get a used engine to be completely rebuilt.
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  #10  
Old June 6th, 2011, 09:44 AM
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Matthew
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Where are people getting these 2.8 TGV engines?
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  #11  
Old June 6th, 2011, 09:47 AM
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thomas
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South America, or the U.K.
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  #12  
Old June 6th, 2011, 11:13 AM
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I vote for diesel, just because of the versatility of heavy oil engines and somewhat better fuel efficiency.

They are noisy beasts, however!
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  #13  
Old June 6th, 2011, 11:32 AM
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Tony Sims
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Doug Shipman or Columbia Rovers can install a diesel for you. Both have done it before and they know their stuff, you don't need to ship your truck to ECR for an engine replacement (no discredit to ECR, just being practical).

If you're sticking with a V8, might as well get a 4.6 (or at least a 4.2) as drop in another 3.9. The fuel consumption will be no worse, many people report better numbers with the 4.6 as it has more torque and will push the truck around with less throttle. The swap requires some conversion of parts, but it's been done many times, it's not rocket surgery. Again, Ship's or CR can do it and do it well.

2.8 diesels are no longer readily available out of the UK, and the Europe source has also dried up. Look south if that's what you want. More practical would be a 300TDi, and do a VNT from Ian at IRB once he gets them to market.
http://www.irbdevelopments.com/index.html
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  #14  
Old June 6th, 2011, 12:27 PM
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Alex Lapidus
1994 D90 ST #1716
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Too much power?

I had the truck dropped at PDX Rovers where I've had work done on it before. Based on my initial discussion with a few of the mechanics the 4.6L is a vast improvement over the 3.9 and the 4.2. Additionally, I can buy a brand new one with no miles on it, but there was some concern that it might be too much power for manual transmission. Does anyone have any first hand experience?
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  #15  
Old June 6th, 2011, 12:43 PM
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Brett
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i have the 4.6/auto. it's spectacular - pretty zippy for a tractor. huge difference climbing hills and accelerating to over-take compared to the 3.9's i test-drove. highly recommended. if your ever up in seattle, you are welcome to take it for a test drive.

as you're not far from Seattle - you might want to consider http://www.lamornagarage.com/ for your engine-swap; closer than ECR
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  #16  
Old June 6th, 2011, 01:20 PM
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Tony Sims
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I correct myself. There is another 2.8 diesel source in the UK now -- MD Engineering http://www.mdengineering.co.uk/

For the record, there's no difference in displacement between a 3.9 and 4.0, LR just started calling it a 4.0 when it went in the P38 and later Discos.
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[appropriated from Ren Ching] Most faults can usually be traced to the badge on the grill.
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This is straight out of the Manual for Build Builders.
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  #17  
Old June 6th, 2011, 01:30 PM
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Jake K.
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The manual drivetrain will deal with the 4.6 or even better the 5 liter versions without any problems. All the Rover V8's are a direct drop-in and require very little mods. The 4.0 is different than the 3.9 in terms of strength hence it being a cross-bolted bottom-end. I actually prefer the 4.0 with a mild cam and some shaved trumpets compared to the 4.6's. They just seem to wind up abit faster than the 4.6's. Fuel economy seems better with anything other than the 3.9 due to you not having to get on the pedal as hard to get up to speed.
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  #18  
Old June 6th, 2011, 01:45 PM
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I would personally be a bit leary of a new 4.6 seeing how much trouble the DII guys have had
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  #19  
Old June 6th, 2011, 07:16 PM
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Dave Sherwood
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A heavy duty clutch should be done if you get the 4.6... one of our club members had a 4.6 in his and the clutch tends to slip when hard on the throttle.

A 4.0 with a little work can be a beast - my old 88 had a tweaked 4.0 in it...they did the following:

Dual roller timing chain and metal timing gears
Shaved intake trumpets
Crane Cam and lifters
Upped the fuel pressure with a different resistor (or something)
Did something to the oil pump to get the pressure up at low revs.

Forgive my lack of technical knowledge...but the thing was a beast (although did not get the best mileage ) :-)
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  #20  
Old June 7th, 2011, 12:41 PM
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Alex Lapidus
1994 D90 ST #1716
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Ordered a 4.6

After weigh all the options, I ordered a 4.6L from Atlantic British through PDX Rovers. They are going to install/do the following with it:

1. Fully rebuilt heads
2. 3 new drive belts
3. New water pump
4. New clutch
5. Resurface the flywheel
6. New Coolant hose kit

Does that like a reasonable list of things while I'm this deep into my truck?
Would anyone suggest anything different or additional?

The enging is $4600 and labor is going to be another $1500. All said and done: $8200.

Ouch, but not alot of other options...
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