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  #181 (permalink)  
Old 01-07-2013, 07:41 PM
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your old motor mounts you carry into the store,lol. he has new left side part number? and new right side part number? and see which one is the same
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  #182 (permalink)  
Old 01-07-2013, 07:45 PM
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Damn, I must be really tired because I still don't get what you're trying to tell me.

I have these 2 mounts that I took off my truck so I know they fit. I can't remember which side goes on left or right side.

I think you're telling me that if I go to the parts store they'll look up the part numbers I have and will tell me which one is left or right? That's sounds good because I can't figure out what they're going to compare them to. The parts store online gives the same part number for both sides.
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  #183 (permalink)  
Old 01-07-2013, 07:49 PM
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maybe your mounts are inter change able but came from different suppliers or manufacturers or the number was up dated? and yes,if they were different,the parts guy would show you 2 different mounts.you would compare both of your mounts to the stores left mount and which ever 1 matched would also be your left mount. the other mount goes on the other side
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  #184 (permalink)  
Old 01-07-2013, 07:55 PM
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I'll try that tomorrow but I already know they're different. I found this on the internet and it talks about both of my part numbers 334601 and 334970:

The steel brackets bolted to the engine from 1973 to 1988 differ slightly in length so it's important to get the correct pieces for the vehicle you have.

The 1973-76 B body GM cars use the longer bracket (part number 334601); all other 1973 and later GM cars use the shorter bracket (part number 334970)
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  #185 (permalink)  
Old 01-07-2013, 10:59 PM
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Quote:
Originally Posted by PRHeloPilot View Post
I'll try that tomorrow but I already know they're different. I found this on the internet and it talks about both of my part numbers 334601 and 334970:

The steel brackets bolted to the engine from 1973 to 1988 differ slightly in length so it's important to get the correct pieces for the vehicle you have.

The 1973-76 B body GM cars use the longer bracket (part number 334601); all other 1973 and later GM cars use the shorter bracket (part number 334970)
In doing some looking around, I found: Engine side motor mount brackets? - Third Generation F-Body Message Boards, "the old part# for the LH bracket is 334970". So if I had nothing else to go by, I'd use the p/n 334970 on the left side.

BTW, the 334601 is also said to be both L and R for a BBC install- 454BB valve cover hitting firewall! - The 1947 - Present Chevrolet & GMC Truck Message Board Network.
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  #186 (permalink)  
Old 01-07-2013, 11:06 PM
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Quote:
Originally Posted by cobalt327 View Post
In doing some looking around, I found:

454BB valve cover hitting firewall! - The 1947 - Present Chevrolet & GMC Truck Message Board Network, "GM Part# 334601 are 1972 Big Block L or R ENGINE FRAME BRACKET".

and

From Engine side motor mount brackets? - Third Generation F-Body Message Boards, "the old part# for the LH bracket is 334970".
I guess 334970 is going on the LH and the 334601 is going on the RH side until I install it on the frame in a few weeks and let's see what happens.

Thanks Cobalt.

BTW, I'm researching what oil to use in my SBC and was just reading one of your posts regarding oil viscosity on another thread when I got the email that you had posted here. Nice coincidence.
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  #187 (permalink)  
Old 01-08-2013, 04:26 PM
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Well, I use either Kendall or Royal Purple 10W30.
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  #188 (permalink)  
Old 01-08-2013, 05:13 PM
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I use royal purple or Lucas.the viscosity for your engine depends on your clearances and use.I use 50w
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  #189 (permalink)  
Old 01-08-2013, 05:53 PM
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Thanks guys. Oil preferences are like woman where everybody has their own tastes and everybody is correct, for their own circumstances.
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  #190 (permalink)  
Old 01-08-2013, 06:09 PM
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PRHeloPilot do you have easy access to rotella 20/50? You know what that goes in and the conditions it faces there
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  #191 (permalink)  
Old 01-08-2013, 06:30 PM
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Walmart sells Rotella but I'm going to stick with what I know for now. Thanks.
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  #192 (permalink)  
Old 01-08-2013, 06:47 PM
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Im talking about the aviation grade oil used in small planes. Its a shell product and good quality.It works in airplanes under severe conditions
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  #193 (permalink)  
Old 01-08-2013, 06:52 PM
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We use Aeroshell here for the aircraft.
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  #194 (permalink)  
Old 01-08-2013, 06:59 PM
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thats what I was thinking,aeroshell. 20/50,used that in my 172
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  #195 (permalink)  
Old 01-08-2013, 07:03 PM
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20/50 is too thick for my taste. I just bought 5w30 synthetic blend today.
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