aboatguy

Will a Cloyes Timing Chain set [CL-3145 ] fit on a 93 LT1 with an electric water pump with the original timing cover?

I know that it will work on my 95 however, a friend wants to install a double roller on his 93.

Thanks

Mike

LTwonZ

iTrader: (1)

I not sure about that one on a 93, but on my 93 a run a double roller from cmotorsports. part # EX-187

http://www.cmotorsports.com/93-97-fb...ine-timingsets

dhdenney

iTrader: (53)

I thought you had to use the newer style opti and timing cover. I do not know however, cuz I don't have any of those items nor a double roller.

BizZzatch350

iTrader: (33)

Has to have an electric water pump and a newer style timing cover.

MattZ28

iTrader: (4)

I had to grind the **** out of my timing cover. Make sure you put assembly lube on the timing chain and sprockets, install the cover, and turn over the motor to see where it's rubbing.

Alex94TAGT

Yes, to run the Cloyes 9-3145, you need a 1995+ camshaft/optispark/timing cover/etc, as well as the electric waterpump. I run it on my 1994, using said conversions.

Why?

-The 1992-1994 LT1 cam gear had a slot in the center to accept the splined opti driveshaft. Without that exact style cam gear, your optispark will cease to function. The Cloyes 3145 simply will not accommodate a pre-95 optispark, since the center hole is enlarged & without splines.

-Beyond that, the Cloyes 9-3145 cam gear will not have the unique LT1 waterpump drive teeth on the back, thus rendering your factory internally-driven waterpump useless. That's where the electric waterpump comes in.

--------------------------
As I see it, you have four options as far as timing sets are concerned:

1) Buy a new stock-replacement 1993 GM timing set.

2) Try the $400 Cloyes '92-'94 timing set from More Performance.

3) Shell out $550 for the custom '92-'94 LT1 Doug Rippie timing set.

4) Spend the money to convert to a 1995+ camshaft/optispark/opti wiring harness/vacuum hoses/timing cover. Then you have the option of running the LT1/LT4 HD timing set. Or, if you add an electric waterpump to that list, you can run virtually any 1987+ SBC timing set.

If you need any part numbers, let me know...

-Alex

Alex94TAGT

*It should be noted that, if the product photos are accurate, the $400 Cloyes and $550 Doug Rippie timing sets appear to be the same type of stiff-backed/link-belt chain as used by the stock timing set. (i.e., these are not roller chains)

For this reason, I really wouldn't consider them -- if you were crazy enough to consider them in the first place, given the pricetag. Just letting you know your options...

aboatguy

Thanks, I will tell my friend that I was right!
I am sure glad I have a 95/
MIke

Nite_Hawk

what this you have to use the earlier style hub, for 95-97 lt1's?

MattZ28

iTrader: (4)

^huh?

I have a '96 and had to switch to a '94 style hub with the double roller.

Nite_Hawk

That's what i'm trying to find out...Why do you need to switch to the 94 style? Why can't you use the 95-97 style. Just trying to get my information straight before i order a timing set this week.

Alex94TAGT

I'm not 100% certain, as I don't have an OBD2 vehicle, but I believe the crankshaft position sensor may have to be disabled in order to run a double-roller on 1996-1997 vehicles.

The double-roller crank gear is thicker, which might not allow enough space for the crank sensor behind the timing cover. In which case, the crank sensor would need to be removed & disabled. The electrical connector port for the crank sensor would also need to be sealed, unless you swap over to a 1995 cover.

As far as the hubs are concerned, I know that the 1996-1997 LT1 hubs were shorter to accommodate the crank sensor/reluctor wheel. Perhaps the longer '93-95 hubs are required to compensate & maintain pulley/belt alignment with the crank sensor removed?

Just an assumption. Perhaps someone else can clarify.