I can't seem to figure this out. I am replacing a loose timing chain. The auto parts sold me one that is pretty much the same length as the old one. They ordered another type. Same thing. They all measured approx. the same length, all 3 of them. Unfortunately, they are all too loose and won't work. Since I don't see any tensioner or adjustment for it, how am I going to replace it? Is there some change in the parts since they were originally put out? I am driving a 1972 Dodge B100 Van, 225 /6. Also is there a difference between straight 6 and slant 6?

Wear on sprockets making new chain seem loose ??

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Part of Tyrde-Browne Racing

No, the sprockets are new. I'm thinking maybe when I originally bought the van that the motor may have been replaced by another one. I had it overhauled not too long ago and I noticed the new timing chain seemed loose then also, which is probably why I am needing to change it now. How can I ID the motor to find out what year and size it is, just to be certain ? It may be needing a different timing set kit than the B100 uses. Thanks.

I didn't think there were different timing sets for slant, they should all be the same.

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Part of Tyrde-Browne Racing

All the slant six timing sets interchange. There isn't a set with a shorter chain. I had a block like this once. The cam and crank bores were simply too close together. There really isn't anything to do short of fabricating a tensioner or replacing the block.

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Joshua

Just make sure the tension is against the chain as it will be when running when you set the cam timing. Could be off a few degrees if you don't.

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Part of Tyrde-Browne Racing

Here's a thread that show where your engine ID number is located.Once you have that someone here will be able to decode it for you.
http://www.slantsix.org/forum/viewtopic ... ion#232399
The slant 6 is a straight 6 it just lays over at an angle and to my knowlage is the only OHV straight 6 that MoPar has made since it's introduction in 1959. I'm also curious about your description of a 'loose' chain..Are the gears and chain installed and you have back and forth movement on chain say half way between gears? like checking fan belt tension?

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83 B-150 slant 6,4 speed. 79 B-300 360 pathfinder 4x4. 74 W-300 318 4x4 git-r-done 80 B-100 sl6,4speed

If your block was line bored quite a bit that can cause sloppy chain.

No, actually there is nothing wrong with motor. Last week I did some serious online searching and found out there is actually a 50 link chain (which is the one everyone was telling me was the only one it could possibly take), and there is a lesser known 48 link chain. Luckily I found an auto parts guy who went to the trouble of looking through his books and tracked down the 48 link chain parts #, then found one in his stockroom. I took it home and guess what, it was too short. By now most people would have given up but I figured I had one last option, to find the whole timing kit for the smaller chain. I finally found one at a machine/parts shop, took it home and finally the whole thing fit just right. Unbelievable but it is way better a fit. It should last much longer than the looser 50 link chain did. I got lucky. Now If I can figure out what year the motor is, I should be set. Thanks for all your advice here. Diane

That's an incredible story. I didn't know they was anything but the one common chain.

Do you happen to have the chain and gear brand an part #s you can post? May save someone some trouble some day....

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DynoDave
1970 Plymouth Duster
1972 Dodge Charger Rallye
1977 Chrysler Cordoba
WPC # 12304

It is possible to make a timing set work with a shorter chain as long as the sprockets are slightly smaller and the chain pitch is adjusted accordingly. Are both sets of the silent type or is one a roller chain? Can you provide pictures of both sets? I second the request for the brands and part numbers.

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Joshua

What's the tooth count on the different gears (48 vs 50)?

Is the pitch the same between the sets?

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Ed
64 Valiant 225 / 904 / 42:1 manual steering / 9" drum brakes

The chain is Cloyes part # C494 (48 links) versus the too long (50 link) C495 . I don't have the camsprocket tooth count with me but it is somewhat smaller in size than the C495 kit comes with. The chain and camsprocket are both smaller, the cranksprocket is the same as the larger one. They are included that way in the kit and do fit. I'll post the #'s as soon as I take another look at the box.

I was a bit intrigued by that question, and when searcing through the Cloyes catalog at cloyes.com, the C494 chain is used for a lot of engines, lots of V8 Fords and the old Chevy 348/409 V8's, but the only Dodge I found was the old flathead. More interesting though are all the 199 cu.in/3.3 litre., 233 cu .in/3.8 litre., and the 258 cu.in./4.2 litre six cylinder engines for Jeep/AMC/International!

Do you happen to have a straight six in your truck, and could it be that some previous owner dumped the slantsix and put an AMC engine in its place? (So, you're in market for a slant now, eh?)

Sorry, I forgot; Welcome to the site!

Olaf

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Aspenized

if you put a small gear on cam and not a smaller on crank....you have changed ratio .... as engine turns it will change cam timing...wont work