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5.9 Magnum and a 318 #3036360
04/23/22 03:27 PM
04/23/22 03:27 PM
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Great Neck,LI,new york
hemi-itis Offline OP
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Will the front pullies,a/c and water pump from a 318/340 fit a magnum engine?


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Re: 5.9 Magnum and a 318 [Re: hemi-itis] #3036373
04/23/22 03:53 PM
04/23/22 03:53 PM
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HotRodDave Offline
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If you switch the timing cover and all plus I think I had to modify one of the bolt holes on a magnum head, theyre on a differnt plane and less of them so you might have to grind one of them away. On the other hand it is very easy to use the magnum serp belt set up in an old car, the PS hoses usually screw right in the back of the pump, the AC just needs lines made at a local NAPA or something and hook up the existing clutch wire. One heater hose needs extended and maybe a couple other little things I can't remember


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Re: 5.9 Magnum and a 318 [Re: HotRodDave] #3036419
04/23/22 06:51 PM
04/23/22 06:51 PM
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Great Neck,LI,new york
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Thanks Dave! up


HEMI-ITIS has no cure.
My condition is fully BLOWN!!
Re: 5.9 Magnum and a 318 [Re: hemi-itis] #3036420
04/23/22 06:57 PM
04/23/22 06:57 PM
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You'll need a 45 degree fitting in the intake manifold for the water pump bypass hose.
Doug

Re: 5.9 Magnum and a 318 [Re: dvw] #3036444
04/23/22 08:26 PM
04/23/22 08:26 PM
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fredericksburg,va
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Everything changed over, I can take a pic of mine if you like. The later harmonic balance won’t work, pully is made into it

Re: 5.9 Magnum and a 318 [Re: cudaman1969] #3036532
04/24/22 10:20 AM
04/24/22 10:20 AM
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ILLINOIS
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volaredon Offline
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Originally Posted by cudaman1969
Everything changed over, I can take a pic of mine if you like. The later harmonic balance won’t work, pully is made into it

Only the last 2-3 years, I know that 98 versions still have the damper and pulley as seperate pieces but somewhere around 00-01 they went to integral pulley. My 01 Durango had the integral pulley as did the replacement '00 360 did. But not all magnum 360s had that

Re: 5.9 Magnum and a 318 [Re: dvw] #3036725
04/24/22 10:02 PM
04/24/22 10:02 PM
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Great Neck,LI,new york
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Originally Posted by dvw
You'll need a 45 degree fitting in the intake manifold for the water pump bypass hose.
Doug

Thanks Doug up


HEMI-ITIS has no cure.
My condition is fully BLOWN!!
Re: 5.9 Magnum and a 318 [Re: volaredon] #3036726
04/24/22 10:03 PM
04/24/22 10:03 PM
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Great Neck,LI,new york
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Originally Posted by volaredon
Originally Posted by cudaman1969
Everything changed over, I can take a pic of mine if you like. The later harmonic balance won’t work, pully is made into it

Only the last 2-3 years, I know that 98 versions still have the damper and pulley as seperate pieces but somewhere around 00-01 they went to integral pulley. My 01 Durango had the integral pulley as did the replacement '00 360 did. But not all magnum 360s had that

The pulley is separate


HEMI-ITIS has no cure.
My condition is fully BLOWN!!
Re: 5.9 Magnum and a 318 [Re: volaredon] #3036939
04/25/22 12:47 PM
04/25/22 12:47 PM
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fredericksburg,va
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Originally Posted by volaredon
Originally Posted by cudaman1969
Everything changed over, I can take a pic of mine if you like. The later harmonic balance won’t work, pully is made into it

Only the last 2-3 years, I know that 98 versions still have the damper and pulley as seperate pieces but somewhere around 00-01 they went to integral pulley. My 01 Durango had the integral pulley as did the replacement '00 360 did. But not all magnum 360s had that

Yes I know, the meaning of later

Last edited by cudaman1969; 04/25/22 12:48 PM.
Re: 5.9 Magnum and a 318 [Re: hemi-itis] #3038152
04/29/22 08:39 AM
04/29/22 08:39 AM
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Weatherford, Texas
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MagnumSwap.com is full of good information, don’t know which oil pan you’ll be using but pay close attention to that section or you’ll have an Exxon Valdez experience under the car…DAMHIK…. whiney

Last edited by RapidusMaximus; 04/29/22 08:40 AM.

1968 Plymouth GTX
1974 Dodge P/U Long Bed Stepside 318
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Re: 5.9 Magnum and a 318 [Re: RapidusMaximus] #3112902
01/17/23 03:41 PM
01/17/23 03:41 PM
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Falcon, CO
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...this is the most recent and most relevant thread I could find on the topic, and have a quick clarification question about bolting an LA 360 car oil pan up to a magnum block: is swapping out the timing cover for an LA unit 100% required in order to bolt up an LA pan to a magnum engine? Sounds like it is...and if that's the case then I think that means the magnum water pump and serpentine setup cannot be used either...hmmmm...

Last edited by Mad-Max; 01/17/23 05:36 PM.

71 Demon (project): 318, A-833od, 8-3/4, 3.23's
14 Wrangler JKU M-380 "Oxx" (under construction): Magnum 360, 46rh, Atlas4, D60/14b-5.38s-Grizzlys, 40s
07 Ram 3500 MegaDually 4x4 "Big Mack": 5.9 6BT, G56 'Toy Hauler'
52 Willys M-38 "Poncho"
Re: 5.9 Magnum and a 318 [Re: Mad-Max] #3112974
01/17/23 07:58 PM
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Western Colorado High Desert
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I've seen a few LA oil pans with Magnum water pump and pulley setups. Just saw one in a 68 Barracuda this weekend at a car show.


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Re: 5.9 Magnum and a 318 [Re: Mad-Max] #3112976
01/17/23 08:02 PM
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fredericksburg,va
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Originally Posted by Mad-Max
...this is the most recent and most relevant thread I could find on the topic, and have a quick clarification question about bolting an LA 360 car oil pan up to a magnum block: is swapping out the timing cover for an LA unit 100% required in order to bolt up an LA pan to a magnum engine? Sounds like it is...and if that's the case then I think that means the magnum water pump and serpentine setup cannot be used either...hmmmm...

Basicly the only difference between covers is the magnum cover has no place for a mechanical pump, maybe timing marks too. I have the later rear sump magnum pan on my 340 for racing and put the moroso 340 pan on the magnum. All it takes is a little ingenuity.

Re: 5.9 Magnum and a 318 [Re: Mad-Max] #3113008
01/17/23 09:15 PM
01/17/23 09:15 PM
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Originally Posted by Mad-Max
...this is the most recent and most relevant thread I could find on the topic, and have a quick clarification question about bolting an LA 360 car oil pan up to a magnum block: is swapping out the timing cover for an LA unit 100% required in order to bolt up an LA pan to a magnum engine? Sounds like it is...and if that's the case then I think that means the magnum water pump and serpentine setup cannot be used either...hmmmm...

No you don't need to swap the cover. The difference is all in the front of the oil pan. If you are using a magnum pan use the magnum pan gasket. LA pan, use the LA pan gasket. You can't use a magnum pan on an LA 318 or an LA 318 pan on a magnum. The rear main cap seal is different. The magnum is the same as the LA 360 main cap seal.


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Re: 5.9 Magnum and a 318 [Re: Guitar Jones] #3114203
01/18/23 02:56 PM
01/18/23 02:56 PM
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Falcon, CO
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alright good - I didn't want to swap over to an LA cover, and I have another idea on how to seal the pan, but it's good to know the LA gaskets will work. Thanks all


71 Demon (project): 318, A-833od, 8-3/4, 3.23's
14 Wrangler JKU M-380 "Oxx" (under construction): Magnum 360, 46rh, Atlas4, D60/14b-5.38s-Grizzlys, 40s
07 Ram 3500 MegaDually 4x4 "Big Mack": 5.9 6BT, G56 'Toy Hauler'
52 Willys M-38 "Poncho"
Re: 5.9 Magnum and a 318 [Re: Mad-Max] #3114296
01/18/23 08:29 PM
01/18/23 08:29 PM
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So if I understand correctly: LA engine can use the magnum serpentine belt system and what is needed from the magnum: alternator and a/c compressor (and pulleys of course), belt tensioner, water pump w/pulley (or just pulley possibly?), balancer pulley (or does one need the balancer too?)? Power steering and pulley (if power steering car) or if non power steering, make some idler pulley? Everything else can be from the LA?

I ask because I would like to use the serpentine system on a stock looking 71 318, just without power steering. I would like to have the alternator on drivers side and a/c unit on passenger side.

Re: 5.9 Magnum and a 318 [Re: roadrunninMark] #3114315
01/18/23 09:21 PM
01/18/23 09:21 PM
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Originally Posted by roadrunninMark
So if I understand correctly: LA engine can use the magnum serpentine belt system and what is needed from the magnum: alternator and a/c compressor (and pulleys of course), belt tensioner, water pump w/pulley (or just pulley possibly?), balancer pulley (or does one need the balancer too?)? Power steering and pulley (if power steering car) or if non power steering, make some idler pulley? Everything else can be from the LA?

I ask because I would like to use the serpentine system on a stock looking 71 318, just without power steering. I would like to have the alternator on drivers side and a/c unit on passenger side.

You can put the LA stuff on a magnum using the LA timing cover and water pump. You can not put the magnum stuff on the LA without the heads, timing cover, water pump and intake manifold. You will need the magnum alternator, compressor, the early magnum crank pulley, and power steering pump bracket. I just used the whole pump and bracket assembly. You can use the LA balancer if you have the early (pre 2000?) magnum crank pulley or you can use the late one piece magnum balancer on a 318 or any other internally balanced crankshaft.


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'92 D250 Club Cab CTD, 47RH conversion, pump tweaks, injectors, rear disc and hydroboost conversion.
'74 W200 Crew Cab 360, NV4500, D44, D60 and NP205 divorced transfer case. Rear disc and hydroboost coming soon!
2019 1500 Long Horn Crew Cab 4WD, 5.7 Hemi.






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