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Differences between Cloyes timing chains

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Old Oct 3, 2005 | 01:26 PM
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Default Differences between Cloyes timing chains

Doing a search on the forum yielded more than one part number, so before I ordered the wrong one, I thought I'd ask. Which Cloyes double-roller timing chain do I need for a Meizere HD electric water pump?

9-3145 $80
9-3151 $350
9-3157 $90

Last edited by TM-Z06; Oct 3, 2005 at 02:37 PM.
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Old Oct 3, 2005 | 04:34 PM
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Use the 9-3145. But before you final assemble/silicone the timing cover to the block, turn the motor over several times to see if the chain rubs on the inside of the cover. Clearance the cover if necessary (it is usually the roller pins extending beyond the chain links that rub around the cam sprocket area on an LT1). Use a cut-off wheel on a straight die grinder (or air grinder) and walk it around in a circle.
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Old Oct 3, 2005 | 04:48 PM
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I'm not 100% certain. But, you may have a problem running a Cloyes DR on a 96 with the reluctor ring.
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Old Oct 3, 2005 | 05:33 PM
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Originally Posted by TM-96CE
Doing a search on the forum yielded more than one part number, so before I ordered the wrong one, I thought I'd ask. Which Cloyes double-roller timing chain do I need for a Meizere HD electric water pump?

9-3145 $80
9-3151 $350
9-3157 $90

Good question. I've got a 95 LT-1 and will be installing a Meizere (std) EWP. I figured as long as I was up on that end of the car I might as well eliminate the additional weight from the Cam sproket gear and buy a complete new set (no LT4 HD). Cloyes seemed to be correct choice
for Cam/Crank and chain.........I am all
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Old Oct 3, 2005 | 05:34 PM
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Originally Posted by gslotman
Good question. I've got a 95 LT-1 and will be installing a Meizere (std) EWP. I figured as long as I was up on that end of the car I might as well eliminate the additional weight from the Cam sproket gear and buy a complete new set (no LT4 HD). Cloyes seemed to be correct choice
for Cam/Crank and chain.........I am all
I have the 9-3145 in my '95. Don't use the standard Meziere, get the HD.
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Old Oct 3, 2005 | 05:52 PM
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Originally Posted by TM-96CE
Doing a search on the forum yielded more than one part number, so before I ordered the wrong one, I thought I'd ask. Which Cloyes double-roller timing chain do I need for a Meizere HD electric water pump?

9-3145 $80
9-3151 $350
9-3157 $90
When you do a double roller in a '96 you will need to remove the crank sensor, it will not fit. You can have the crank sensor programmed out of the computer so it does not trip any codes.

Also, when ordering from Cloyes, do NOT get the 9-3145A, that timing set will not work, only the 9-3145!
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Old Oct 3, 2005 | 05:56 PM
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Originally Posted by STL94LT1
I'm not 100% certain. But, you may have a problem running a Cloyes DR on a 96 with the reluctor ring.

OMG!!! I sure dont want to hear that. I checked out Summit Racing, and 9-3145 did not match my car. However, 9-3157 was a match so I ordered it.


CLO-9-3157

Make CHEVROLET
Engine Type V8
CID 350
Liter 5.7
Engine Size 5.7L/350
Beginning Year 1992
Ending Year 1997
Engine Family Chevy small block Gen II (LT-based engines)
Notes: Requires the use of an eletric water pump for installation.
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Old Oct 3, 2005 | 06:10 PM
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Originally Posted by TM-96CE
OMG!!! I sure dont want to hear that. I checked out Summit Racing, and 9-3145 did not match my car. However, 9-3157 was a match so I ordered it.


CLO-9-3157

Make CHEVROLET
Engine Type V8
CID 350
Liter 5.7
Engine Size 5.7L/350
Beginning Year 1992
Ending Year 1997
Engine Family Chevy small block Gen II (LT-based engines)
Notes: Requires the use of an eletric water pump for installation.
Odd, I'm not seeing that part number in the Cloyes catalog?
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Old Oct 3, 2005 | 06:21 PM
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Originally Posted by Zix
Odd, I'm not seeing that part number in the Cloyes catalog?

From Summit Racing

Tell me what you think.....

Last edited by TM-Z06; Oct 3, 2005 at 06:34 PM.
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Old Oct 3, 2005 | 06:43 PM
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I think you need another timing chain. THe only option you have if you want to keep the reluctor ring and CPS other then stock is the HD LT4 set as far I as I know. Some one did some crafytu machine work a while back and was able to get the reluctor ring to work with a standard DR timing set but it was a lot of work from what I remember.
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Old Oct 3, 2005 | 07:21 PM
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Originally Posted by FD2BLK
I think you need another timing chain. THe only option you have if you want to keep the reluctor ring and CPS other then stock is the HD LT4 set as far I as I know. Some one did some crafytu machine work a while back and was able to get the reluctor ring to work with a standard DR timing set but it was a lot of work from what I remember.

If my guy can't get this Cloyes to work, then I'll have to order the GM unit.
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Old Oct 3, 2005 | 07:36 PM
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Originally Posted by TM-96CE
If my guy can't get this Cloyes to work, then I'll have to order the GM unit.
If you want the double roller and you can't get that one to work, just order the 9-3145, that is what I am running in my LT4
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Old Oct 3, 2005 | 07:49 PM
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Originally Posted by Zix
If you want the double roller and you can't get that one to work, just order the 9-3145, that is what I am running in my LT4
Zix - are you running an electric water pump?

I wonder why Summit Racing's website does not show 9-3145 as a match for the GenII (LTx) engine?




CLO-9-3145

Make CHEVROLET
Engine Type V8
CID 350
Liter 5.7
Engine Size 5.7L/350
Beginning Year 1985
Ending Year 2000
Engine Family Chevy small block Gen I
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Old Oct 3, 2005 | 07:58 PM
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Great thread I was getting ready to ask this question!!
This means I can buy an electric water pump and timing chain for about the same money I did not spend on the Kent Moore harmonic balancer puller!

Last edited by aboatguy; Oct 3, 2005 at 08:27 PM.
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Old Oct 3, 2005 | 08:01 PM
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Yep, I am running the Mez HD electric pump.

Well, Summit might not show it because it really isn't a perfect fit because you do need to remove the crank sensor for it to fit. Cloyes lists the 9-3145 as a fit for '85 and up roller blocks...not specifically for the LT1.
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Old Oct 3, 2005 | 08:22 PM
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Originally Posted by Zix
Yep, I am running the Mez HD electric pump.

Well, Summit might not show it because it really isn't a perfect fit because you do need to remove the crank sensor for it to fit. Cloyes lists the 9-3145 as a fit for '85 and up roller blocks...not specifically for the LT1.

Hmm - if that's the case.... 9-3157 should work for me - since it's supposed to be designed for the LTx motor.
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Old Oct 3, 2005 | 08:27 PM
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Originally Posted by TM-96CE
Hmm - if that's the case.... 9-3157 should work for me - since it's supposed to be designed for the LTx motor.
Post your results, I'm very curious how it works! When I ordered mine I was on the phone with Cloyes and they told me they didn't have any double rollers that were specifically for the LT engines!
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Old Oct 3, 2005 | 08:43 PM
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I used the cloyes billet hex adjust for 86+ blocks with no problems
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Old Oct 3, 2005 | 09:02 PM
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Originally Posted by Baldturbofreak
I used the cloyes billet hex adjust for 86+ blocks with no problems
The hex-adjust won't work on an LT block though because the cam pin needs to be free to spin the Opti, but the hex-adjust sets have the adjuster covering the pin so it won't fit into the optispark.
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Old Oct 4, 2005 | 12:54 PM
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Originally Posted by TM-96CE
OMG!!! I sure dont want to hear that. I checked out Summit Racing, and 9-3145 did not match my car. However, 9-3157 was a match so I ordered it.


CLO-9-3157

Make CHEVROLET
Engine Type V8
CID 350
Liter 5.7
Engine Size 5.7L/350
Beginning Year 1992
Ending Year 1997
Engine Family Chevy small block Gen II (LT-based engines)
Notes: Requires the use of an eletric water pump for installation.
This is what Cloyes told me to use so I hope it works.
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