serprntine system - The 1947 - Present Chevrolet & GMC Truck Message Board Network

jasonrog · 09-04-2003, 02:44 PM

I have a serpentine system off a 90 truck. I am ready to install it but have a question. The new alternators wiring is slightly different. It still has the heavy cable that bolts to the back of the alternator, but the plug connector has only 1 small guage wire. Any suggestions? Wiring diagrams?

Thanks
Jason

cdowns · 09-04-2003, 02:56 PM

don't forget to change the water pump

jasonrog · 09-04-2003, 03:02 PM

why change the pump? Reverse rotation?

nate68 · 09-04-2003, 04:46 PM

after workin on a car with serpentine i am glad i diecided not to do a serpentine setup. pain in the butt

jasonrog · 09-05-2003, 02:13 AM

Why are guys installing them then?

nate68 · 09-05-2003, 05:18 PM

it's a trend. it's expensive for not htat much in hp gain
i personally don't like working on serpentine systems.

cableguy0 · 09-05-2003, 06:37 PM

serpentine systems are easier to deal with the belts last longer and dont slip. vbelts come want to come apart and slip terribly at higher rpm whereas as a serp belt system doesnt. a serp belt requires no tightening because it has a tensioner the belt usually needs replaced every 60 thousand miles and thats it. i think you can just use your alternator in the bracket just swap the pulleys over. im almost positive both have the 12 oclock 6 oclock bolt pattern meaning the mounting holes are directly across from one another

jasonrog · 09-05-2003, 10:32 PM

I have everything that came with the serp system, alternator, ps pump, and water pump. Should I do the swap or not. It won't cost a penny except for a water pump gasket.

GMC JUNKIE TOO · 09-05-2003, 11:26 PM

The diffrence in the alternator is it is a one wire hookup, look in the faq board for a wiring diagram to hook it up.

jasonrog · 09-06-2003, 01:54 AM

I looked through the faq and found nothing.

fast71 · 09-06-2003, 08:33 AM

try this http://www.chevelles.com/techref/tecref14.html

jasonrog · 09-07-2003, 01:03 AM

I got most of the swap done in about two hours. Unbolt and bolt back on. Very simple. One problem I ran into is the old water pump had a fitting on it for a heater hose. The new pump does not. Where can I hook up the second heater hose? I can't leave it disconected for too long 'cause it is starting to get cool gere at night. A couple of more weeks and I will need the heat.

Thanks
Jason

jasonrog · 09-08-2003, 10:29 AM

Since the water pump was changed, does the fan need to be changed as well?

Primed67 · 09-08-2003, 11:01 AM

If you are wanting to pick up horse power through your pulleys why not go with under drive pulleys. I would recommend a 30%.

jasonrog · 09-08-2003, 12:34 PM

I am not after the power. The reason I did this was that my ps pump died on me and I had the whole system (Alt, brackets, pullys, ps pump, water pump, belt, etc.) off a new truck sitting in the garage. It was a lot cheaper than buying a new pump.
Jason

Primed67 · 09-08-2003, 01:18 PM

I read you loud and clear. I probably would have done the same thing if I was in your situation.

SCOTI · 09-08-2003, 05:43 PM

Most late model systems that utilize the serpentine set-up have the second heater hose fitting in the radiator.

nate68 · 09-11-2003, 01:46 AM

serpentine systems wouldnt be that bad as long as you are running electric fans.

69sixpackbee · 09-11-2003, 12:56 PM

Serp. systems are put on by the mfg's. for one reason and one reason only..to save manufacturing $$. We are stuck with 'em now. Besides the newer designs would be a PITA to access the belts separately anyway.

09-04-2003, 02:44 PM	#1
jasonrog Registered User Join Date: Sep 2000 Location: Winnipeg, Manitoba Canada Posts: 248	serprntine system I have a serpentine system off a 90 truck. I am ready to install it but have a question. The new alternators wiring is slightly different. It still has the heavy cable that bolts to the back of the alternator, but the plug connector has only 1 small guage wire. Any suggestions? Wiring diagrams? Thanks Jason

09-04-2003, 02:56 PM	#2
cdowns Senior Member Join Date: Jan 2003 Location: daytonabeach Posts: 22,956	don't forget to change the water pump __________________ 71c-10 350/2004r/4:11 lowered3/4 longbed/dead by hurricane MEANING OF DEATH::::: SOMEBODY ELSE GETS YOUR STUFF DONT BELIEVE EVERYTHING YOU THINK TAKE MY ADVISE;I DON'T USE IT ANYWAY

09-04-2003, 04:46 PM	#4
nate68 Registered User Join Date: Jan 2000 Location: ca Posts: 1,110	after workin on a car with serpentine i am glad i diecided not to do a serpentine setup. pain in the butt __________________ 68 short step, 406/700r4, 9" w/discs.

09-05-2003, 05:18 PM	#6
nate68 Registered User Join Date: Jan 2000 Location: ca Posts: 1,110	it's a trend. it's expensive for not htat much in hp gain i personally don't like working on serpentine systems. __________________ 68 short step, 406/700r4, 9" w/discs.

09-05-2003, 06:37 PM	#7
cableguy0 Senior Member Join Date: Apr 2000 Location: Delta,Pa Posts: 14,950	serpentine systems are easier to deal with the belts last longer and dont slip. vbelts come want to come apart and slip terribly at higher rpm whereas as a serp belt system doesnt. a serp belt requires no tightening because it has a tensioner the belt usually needs replaced every 60 thousand miles and thats it. i think you can just use your alternator in the bracket just swap the pulleys over. im almost positive both have the 12 oclock 6 oclock bolt pattern meaning the mounting holes are directly across from one another __________________ Owner of North Point Car Care in Dundalk Md. We specialize in custom exhaust on both modern and classic vehicles. We are a full service auto shop from classics to modern vehicles. Feel free to contact me with questions. I will give a 10% discount to any board member.

09-04-2003, 03:02 PM	#3
jasonrog Registered User Join Date: Sep 2000 Location: Winnipeg, Manitoba Canada Posts: 248	why change the pump? Reverse rotation?

09-05-2003, 02:13 AM	#5
jasonrog Registered User Join Date: Sep 2000 Location: Winnipeg, Manitoba Canada Posts: 248	Why are guys installing them then?

09-05-2003, 10:32 PM	#8
jasonrog Registered User Join Date: Sep 2000 Location: Winnipeg, Manitoba Canada Posts: 248	I have everything that came with the serp system, alternator, ps pump, and water pump. Should I do the swap or not. It won't cost a penny except for a water pump gasket.

09-05-2003, 11:26 PM	#9
GMC JUNKIE TOO THE QUICKER FIXERUPER Join Date: Jul 2002 Location: Ok Posts: 615	The diffrence in the alternator is it is a one wire hookup, look in the faq board for a wiring diagram to hook it up.

09-06-2003, 01:54 AM	#10
jasonrog Registered User Join Date: Sep 2000 Location: Winnipeg, Manitoba Canada Posts: 248	I looked through the faq and found nothing.

09-06-2003, 08:33 AM	#11
fast71 Drive it like U stole it Join Date: Mar 2000 Location: tunnel hill ,GA /Chatt,TN Posts: 956	try this http://www.chevelles.com/techref/tecref14.html __________________ 71 custom 10 swb 72 nova ss 72 nova custom 87 s10 96 burb 94 camry 53 5 window 3100

09-07-2003, 01:03 AM	#12
jasonrog Registered User Join Date: Sep 2000 Location: Winnipeg, Manitoba Canada Posts: 248	I got most of the swap done in about two hours. Unbolt and bolt back on. Very simple. One problem I ran into is the old water pump had a fitting on it for a heater hose. The new pump does not. Where can I hook up the second heater hose? I can't leave it disconected for too long 'cause it is starting to get cool gere at night. A couple of more weeks and I will need the heat. Thanks Jason

09-08-2003, 10:29 AM	#13
jasonrog Registered User Join Date: Sep 2000 Location: Winnipeg, Manitoba Canada Posts: 248	Since the water pump was changed, does the fan need to be changed as well?

09-08-2003, 11:01 AM	#14
Primed67 Registered User Join Date: Sep 2003 Location: Tyler Posts: 575	If you are wanting to pick up horse power through your pulleys why not go with under drive pulleys. I would recommend a 30%. __________________ 1969 Chevrolet SWB Stepside 1959 Chevrolet apache * Sold 1967 Prostreet Chevy SWB Fleetside *Sold 2014 1/2 ton Crew Cab Chevrolet 4x4

09-08-2003, 12:34 PM	#15
jasonrog Registered User Join Date: Sep 2000 Location: Winnipeg, Manitoba Canada Posts: 248	I am not after the power. The reason I did this was that my ps pump died on me and I had the whole system (Alt, brackets, pullys, ps pump, water pump, belt, etc.) off a new truck sitting in the garage. It was a lot cheaper than buying a new pump. Jason



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09-08-2003, 01:18 PM	#16
Primed67 Registered User Join Date: Sep 2003 Location: Tyler Posts: 575	I read you loud and clear. I probably would have done the same thing if I was in your situation. __________________ 1969 Chevrolet SWB Stepside 1959 Chevrolet apache * Sold 1967 Prostreet Chevy SWB Fleetside *Sold 2014 1/2 ton Crew Cab Chevrolet 4x4

09-08-2003, 05:43 PM	#17
SCOTI Registered User Join Date: Apr 2001 Location: DALLAS,TX Posts: 21,979	Most late model systems that utilize the serpentine set-up have the second heater hose fitting in the radiator. __________________ 67SWB-B.B.RetroRod 64SWB-Recycle 89CCDually-Driver/Tow Truck 99CCSWB Driver All Fleetsides @rattlecankustoms in IG Building a small, high rpm engine with the perfect bore, stroke and rod ratio is very impressive. It's like a highly skilled Morrocan sword fighter with a Damascus Steel Scimitar..... *Cubic inches is like Indiana Jones with a cheap pistol.*

09-11-2003, 01:46 AM	#18
nate68 Registered User Join Date: Jan 2000 Location: ca Posts: 1,110	serpentine systems wouldnt be that bad as long as you are running electric fans. __________________ 68 short step, 406/700r4, 9" w/discs.

09-11-2003, 12:56 PM	#19
69sixpackbee Registered User Join Date: Jan 2001 Location: Sabinal, Texas Posts: 1,706	Serp. systems are put on by the mfg's. for one reason and one reason only..to save manufacturing $$. We are stuck with 'em now. Besides the newer designs would be a PITA to access the belts separately anyway.

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