Timing chain tensioner for a 360 magnum?

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maca

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Hey guys I'm running a solid cam with quite heavy spring pressures in my 360 magnum. My timing Mark jumps around quite a bit and I'm guessing it's due to the feed back from the spring pressures and timing chain is not tensioned as it never did it when I ran a hydraulic cam.
Does anyone know where I can get a timing chain tensioner from to suit a magnum.
Thanks
 
Any Magnum tensioner will work. Even the 3.9 litre V6 works. I don't like them with double roller chains.
 
Thanks guys
Bugger i am running a double row timing chain. So they won't work?
 
maca said:
Thanks guys
Bugger i am running a double row timing chain. So they won't work?
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They will work but the double rollers are strong and don't really need a tensioner. The tensioner rubbing blocks wear and there is always discussion about where does the material go that rubs off the tensioner blocks.
 
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maca said:
Thanks guys
Bugger i am running a double row timing chain. So they won't work?
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Nope. Not long term anyhow.
20181220_193036.jpg
 
Oh right that is a good point.
I don't know about running a single row tensioner as the seat pressure on the springs is around 420lbs
Might have to put up with a jumping timing. I'd be pretty sure it wouldn't jump around under full rpm
 
I don't have a magnum motor but I use the Edelbrock style chain on all my LA builds. 65'
 
maca said:
Oh right that is a good point.
I don't know about running a single row tensioner as the seat pressure on the springs is around 420lbs
Might have to put up with a jumping timing. I'd be pretty sure it wouldn't jump around under full rpm
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Sorry my mistake 420 is the opening pressure
 
turboking15 said:
That would give a stable reading to the ignition box but wouldnt you still get fluctuation on spark delivery due to needing the distributor for delivery?
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Yeah. I would guess so.

Use a crank trigger and crank driven distributor or coil on plug! It's only money....
 
just use a stock silent chain and its designed tensioner. Plenty strong. Double rollers have less friction and may be stronger but do you really need one? Your not shooting for 100,000 miles on that motor
 
1994redram said:
Cloyes Replacement Timing Chain Tensioners 9-5387

DO NOT use it with an aftermarket performance style chain. The chain will eat into the guide within a couple hundred miles. I know this from personal experience!
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Crap ! I better go change the oil in mine and see if I have any plastic or metal in the oil. Id hate to pull my almost brand new engine apart because of this mistake. But it would give me a reason to upgrade the cam...lol
 
This could have used a tensioner but it wouldn't have prevented the chain from stretching and wearing.
1996 3.9 V6 Magnum

 
Check the intermediate shaft and distributor shaft slot for loose engagement. Bouncing advance weights can also cause fluctuating timing.
 
Thanks for the pics. I have tried one of those as well. I've ordered a new chain set for the new build so hopefully that helps a little.
 
mopar65 said:
Use one of these on your Distribter shaft.i used one on my 440 and it helped a bunch. It takes the slop out between the oil pump drive and the Dist tang.
Climax 1/2 in. Bore Zinc-Plated Mild Steel Set Screw Collar-C-050 - The Home Depot

View attachment 1715301311
Click to expand...
Caution on using an 1/2 set collar for the spacer.
Most Mopar distributor shaft are not a 1/2" in diameter where the spacer get locked down. Mopar shafts are generally .4885 in diameter.
Better to bore out a piece of 1 1/4" round aluminum stock or use a 7/16 collar a bore it to size.
Rick Ehrenberg sells the correctly bored spacer as well.
 
plumcrazy 101 said:
Caution on using an 1/2 set collar for the spacer.
Most Mopar distributor shaft are not a 1/2" in diameter where the spacer get locked down. Mopar shafts are generally .4885 in diameter.
Better to bore out a piece of 1 1/4" round aluminum stock or use a 7/16 collar a bore it to size.
Rick Ehrenberg sells the correctly bored spacer as well.
Click to expand...
Thanks for the info. I got the size from another car site I am on. I locked tighter the set screw on mine and it has working fine for over 5 years now. But I will keep this info in mind when I add one to my small block 5.9
 
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