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Pulley alignment problem swapping from 318 to 340 HELP!
#1034931
07/18/11 12:17 PM
07/18/11 12:17 PM
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Joined: Aug 2004
Posts: 8,526
Tenn.
jrwoodjoe
OP
master
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OP
master
Joined: Aug 2004
Posts: 8,526
Tenn.
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I am trying to use my crank and Water Pump Pulley from my old 318 onto a 340. The Water pump on the 318 is the Aluminum type w/ holes in a circle. The Water Pump on the 340 is the other type. When I put the pulleys on, the water pump pulley groove sits further back (closer to engine) than the groove on the crank pulley. What's the best way to resolve this?
Thanks, Joe
65 Barracuda
70 Challenger
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Re: Pulley alignment problem swapping from 318 to 340 HELP!
[Re: JohnRR]
#1034934
07/18/11 02:12 PM
07/18/11 02:12 PM
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Joined: Aug 2004
Posts: 8,526
Tenn.
jrwoodjoe
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OP
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Posts: 8,526
Tenn.
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Quote:
I just looked at the bouchillon site and they don't list the early pulley for the cast iron water pump , the only smallblock pulley is listed 70-91 with alump waterpump.
I looked on their site also John and noticed the same thing.
Joe
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Re: Pulley alignment problem swapping from 318 to 340 HELP!
[Re: Mr340]
#1034936
07/18/11 02:48 PM
07/18/11 02:48 PM
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Joined: Jan 2003
Posts: 75,082
U.S.S.A.
JohnRR
I Win
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I Win
Joined: Jan 2003
Posts: 75,082
U.S.S.A.
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Quote:
I would swap out the water pump. Also how does the alternator line up?
Too bad it's not that easy , the early setup has the timing marks on the opposite side so if he were to swap the pump he would be unable to see the timing marks on the cover and the balancer , then there is the radiator issue ...
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Re: Pulley alignment problem swapping from 318 to 340 HELP!
[Re: jrwoodjoe]
#1034941
07/18/11 03:46 PM
07/18/11 03:46 PM
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Joined: May 2003
Posts: 15,487
Florida
scratchnfotraction
I Live Here
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I Live Here
Joined: May 2003
Posts: 15,487
Florida
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wp is the same,the one with ribs is a HD unit with a 5/8 shaft those pulleys look correct to me as non a/c ,the wp pully fits behind the first groove on the crank pully and looks like it will hit but clears ok the front groove on the crank pully is for the ps pump alt goes on the back groove with the wp you will need the non a/c alt brackets and swing arm to go with the pullys just in case I am mistaken on the pic,  if that is an early wp pully you will need the later non a/c wp pully
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Re: Pulley alignment problem swapping from 318 to 340 HELP!
[Re: jrwoodjoe]
#1034944
07/18/11 04:31 PM
07/18/11 04:31 PM
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Joined: Jan 2003
Posts: 75,082
U.S.S.A.
JohnRR
I Win
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I Win
Joined: Jan 2003
Posts: 75,082
U.S.S.A.
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Quote:
I know John said the timing marks were on opposite sides but not in this case. Timing marks are both on driver side. The 340 engine is a 69 date code and is using the Timing Cover that came on it when I got the motor. Here's a pic of the 340 WP.
What you have there is the 70-up waterpump , timing cover and Balancer , the cars with the cast iron waterpump have the radiator connection on the drivers side and the timing marks on the opposite side.
You need to compare the waterpumps you have, the depth from the mounting face to the pulley mounting surface .
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Re: Pulley alignment problem swapping from 318 to 340 HELP!
[Re: JohnRR]
#1034945
07/18/11 04:45 PM
07/18/11 04:45 PM
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Joined: Aug 2004
Posts: 8,526
Tenn.
jrwoodjoe
OP
master
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OP
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Joined: Aug 2004
Posts: 8,526
Tenn.
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Quote:
Quote:
I know John said the timing marks were on opposite sides but not in this case. Timing marks are both on driver side. The 340 engine is a 69 date code and is using the Timing Cover that came on it when I got the motor. Here's a pic of the 340 WP.
What you have there is the 70-up waterpump , timing cover and Balancer , the cars with the cast iron waterpump have the radiator connection on the drivers side and the timing marks on the opposite side.
You need to compare the waterpumps you have, the depth from the mounting face to the pulley mounting surface .
Gotcha John, I understand now. I did measure them and they seem to be the same. I didn't pay much attention as to how it was before I removed them from the 318 and I thought the alignment seemed to be off more than it should. 
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Re: Pulley alignment problem swapping from 318 to 340 HELP!
[Re: scratchnfotraction]
#1034950
07/18/11 08:10 PM
07/18/11 08:10 PM
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Joined: Jul 2007
Posts: 1,682
Philadelphia
radar
top fuel
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top fuel
Joined: Jul 2007
Posts: 1,682
Philadelphia
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The (mismatched?) pulleys on my demon threw sparks on first startup. The lips just barely touched. I lightly filed and sanded the WP pulley and no more problems. Actually, that belt setup lasted a few weeks before I got some march pulleys, but I ended up using it again on a 318 build. No problems a year later. My alternator is slightly off but doesn't throw belts or wear super fast. Good luck and don't be afraid to take the lip down a smidge. If you end up filing it down with a big [Edited by Moparts - Family Friendly Site - Keep it clean] file while she's running be careful and take video in case it takes your hand or shoots into your eye socket  rdr EDIT: A ba$tard file is a kind of file, not a curse word! Stupid computer!
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