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Old 28th September 2013, 10:13   #46
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Default Re: XD3P Engine & 5-speed Gear Box

First of all XD3P is a beautiful engine especially on a SWB vehicle , less weight , free revving ability etc BUT .

While you rebuild a XD3P be sure to change almost all the parts which may be in a OK condition in your mech's point of view. while doing rebuild never assemble the engine from the lathe shop, It should be done by an experienced hands with extra care & time, Most of the industrials/lathe guys will just assemble it but not with love&care, XD3P is like a child it needs love & care.

in My place almost all the mechs says IPL pistons,rings,sleeves are the best, I was not able to source them so ended with My mech's second choice

Piston - Goetze Piston
Rings - M&M

these are the main parts I changed in my XD3P while doing the rebuild.

Engine Bearings -
Timing Chain
timing chain tensioner
rocker arm shaft
water pump Assembly
Radiator thermostat valve
Gasket (3Cut)

After 13k or something around it It lost the gasket, Changed again with the same Millers gasket, Sold the jeep But up to now no problem. New owner is fully satisfied with the performance.

Just My experience, I won't do a engine rebuild on XD3P , reason spending 40-50k on a engine rebuild that too on NGCS is not worth the money & time.
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Old 7th January 2014, 19:48   #47
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Default Re: XD3P Engine & 5-speed Gear Box

Originally Posted by fazalaliadil View Post

Likewise for the army an upgrade from KMT-90 to NGT-530 also costs, this is the most probable reason they stick to KMT-90. I am sure they did not test the later gear boxes like BA-10 and NGT-530 and that they failed the test.

I realize this is an old thread, but I'll submit that it's COST, of course, but particularly extra COST in light of the fact that no additional benefits would be realized, since Army vehicle convoys have specified max. speeds of probably 40kmph, where of course a fifth gear could hardly be used. Granted, the Jeeps are often used by staff/officers who might travel alone and want to go faster on occasion - but they're probably not (officially) supposed to!!!

Just my guess.

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