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#1 |
Shake and Bake!
![]() Join Date: Feb 2010
Location: Central Coast, CA
Posts: 609
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Doing Serpentine Conversion Tomorrow And Have Some Questions
Hey Guys,
Ok another nonsense post from me today lol. I am doing a serpentine conversion on my 72 C10 350 tomorrow and have some questions. I scored a complete new OEM GM conversion kit for a 350 crate motor with all new pumps, bolts etc, and the instructions said that GM tested and endorses not having to drill a hole in the passenger side head, which I am pretty happy not to have to do lol. Can I re-use my power steering pump lines? If not what year truck should I ask for new lines for at the parts store? What year truck should I get a reverse cooling fan for? And I have heard some talk of a electric fan conversion from a Taurus or something? I have a AC Delco alternator plug pigtail, but am not sure if it is the right one to convert to my truck? The part number is: PT1742. Is there anything else I am going to run into that you can think of? I would like to get it all done tomorrow if possible. Thanks guys!
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"All tyranny needs to gain a foothold is for people of good conscience to remain silent." Thomas Jefferson "You are remembered for the rules you break." General Douglas MacArthur "Support Our Troops And The NRA" |
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#2 |
Registered User
Join Date: Dec 2007
Location: Nanaimo B.C.
Posts: 604
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Re: Doing Serpentine Conversion Tomorrow And Have Some Questions
I think the new power steering hoses use O rings the older style didn't you may need to get some custom hoses made? and as for the alt I can't help you out but it will put out more than the 37 amps the old stuff made.
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I was hooked on these trucks since 1982 when I drove my budys fathers 1968 Custum GMC 396 automatic dana 60 rear with a power lock diff what a ride more fun then we will we can ever tell!! |
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#3 |
Registered User
Join Date: Nov 2004
Location: Lindenhurst, IL
Posts: 659
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Re: Doing Serpentine Conversion Tomorrow And Have Some Questions
I was just doing some light reading on this exact topic earlier today and here's an article from Car Craft magazine that I think might be helpful. It certainly answers your p/s line question.
http://www.carcraft.com/techarticles...ive/index.html Have fun and keep us posted. |
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#4 |
Registered User
Join Date: Dec 1999
Location: Santee Ca
Posts: 251
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Re: Doing Serpentine Conversion Tomorrow And Have Some Questions
I installed a serpentine belt set up off of a 94 suburban on my 71 swb. And I used the new pump . But I switched the hose fitting from the old pump to the new one with no problems. The old ones screwed rite into the new pump.
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#5 |
Senior Member
![]() Join Date: Aug 2004
Location: Centennial, CO
Posts: 2,951
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Re: Doing Serpentine Conversion Tomorrow And Have Some Questions
If it has the o-ring style hoses, you can swap steering boxes and use one off a late square-body truck. Then you get the faster steering ratio.
Or do the fiting swap into your serpentine pump like EighthD suggested. I think it's a 1" wrench/socket size.
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ClusterTruck: 68 C10 Bought in 89, wrecked in 03. Slow low $ rebuild started '17. 6.0 & TKO http://67-72chevytrucks.com/vboard/s...d.php?t=788602 93 K1500 Short Step, 350, NV4500, EBL flash ECU. Vortec heads & roller cam someday... 05 Jeep Wrangler Unlimited. 3” lift & 6-speed 02 E320 the insurance total “free car” 13 Tahoe LTZ Last edited by clay68c10; 02-18-2010 at 01:51 AM. |
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#6 |
Shake and Bake!
![]() Join Date: Feb 2010
Location: Central Coast, CA
Posts: 609
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Re: Doing Serpentine Conversion Tomorrow And Have Some Questions
Great, thanks for the help guys! I will let you know how it goes, or I will be back with more questions wishing it were done lol.
__________________
"All tyranny needs to gain a foothold is for people of good conscience to remain silent." Thomas Jefferson "You are remembered for the rules you break." General Douglas MacArthur "Support Our Troops And The NRA" |
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#7 |
sharp as a marble
![]() Join Date: Jan 2007
Location: atlantic beach,florida
Posts: 1,082
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Re: Doing Serpentine Conversion Tomorrow And Have Some Questions
I did a serp setup on my Blazer. If you have P/S now, you will need to reuse the fitting that is currently in the back of your P/S pump. Then you should be able to reuse your hoses. Might have to bend them a bit.
I will be using an electric fan setup, but right now I have a fan clutch, and fan blade from a 90's chevy astro van. bolts right on, and will clear the fan shroud |
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#8 |
Registered User
Join Date: Feb 2000
Location: Center City, MN, USA
Posts: 3,254
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Re: Doing Serpentine Conversion Tomorrow And Have Some Questions
So let me get this straight, you can use a new serpentine system without drilling any holes in stock heads?
How about wiring the alternator? Do you do the 1-wire upgrade thing? I have a full setup from a 5.7 liter 1999 suburban in my shop that I'm contemplating putting on my truck. The carcraft link that 1949gmc posted is informitive but it left out the alternator wiring thing and whether or not you need to drill and tap a hole or two in your heads.
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'70 cab, '71 chassis, 383, TH350, NP205. '71 Malibu convertible '72 Malibu hard top Center City, MN |
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#9 | |
sharp as a marble
![]() Join Date: Jan 2007
Location: atlantic beach,florida
Posts: 1,082
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Re: Doing Serpentine Conversion Tomorrow And Have Some Questions
I wrote that this morning, BEFORE my coffee. I put a 330 hp crate motor in my Blazer, and the heads are drilled to accept the serp belt setup, my apology. I also was in need of an engine compartment wiring harness ( the PO's had butchered it ) and so I had the guys at M&H build me an engine compartment wiring harness to accept the alternator, HEI, and electric choke. The harness was $400. crate motor $2800. I have seen on guy that I know drill the original heads to accept the serp belt stuff, but it is not my cup of tea. Hope I have cleared up my before coffee post. here is a pic. There is a way to wire a CS130 alternator ( what comes with the serp belt stuff ) and I think MAD electric covers this.
Quote:
Last edited by cparman; 02-18-2010 at 06:57 PM. |
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#10 |
Shake and Bake!
![]() Join Date: Feb 2010
Location: Central Coast, CA
Posts: 609
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Re: Doing Serpentine Conversion Tomorrow And Have Some Questions
Hey,
Thanks Cparman, hey the problem I ran into today was my lower radiator hose will not work with the passenger side bracket in place. Did you guys have to switch the lower hose on yours? Everything else seems like it is going in well besides that so far.
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"All tyranny needs to gain a foothold is for people of good conscience to remain silent." Thomas Jefferson "You are remembered for the rules you break." General Douglas MacArthur "Support Our Troops And The NRA" |
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#11 |
Registered User
Join Date: Oct 2008
Location: Brighton, TN
Posts: 1,267
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Re: Doing Serpentine Conversion Tomorrow And Have Some Questions
I am currently doing this exact swap and they make a pigtail that goes from the old internal regulator style to the new style. I did an article on this that had a part # for it and I found it on ebay for like 15$ i think. If you do a search you should be able to find it under serp conversion. I will look to see if i can find it as well. As far as the power steering just swap the plug on the back of the pump. its the easiest way.
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A computer once beat me at chess, but it was no match for me at kick boxing. Duct tape is like the force. It has a light side, a dark side, and it holds the world together. |
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#12 |
sharp as a marble
![]() Join Date: Jan 2007
Location: atlantic beach,florida
Posts: 1,082
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Re: Doing Serpentine Conversion Tomorrow And Have Some Questions
yes I did. What I did was is to get a couple of old hoses, and cut them in pieces. Taped them together, and used them as a guide when I went to the parts store to match one up. Took the part # label off of the hose or I would share. I also cut a half circle out of the top of the frame rail to get mor clearance. I will take a picture of what i did tonight and share. I am almost finished with my coffee! ha ha
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#13 |
Shake and Bake!
![]() Join Date: Feb 2010
Location: Central Coast, CA
Posts: 609
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Re: Doing Serpentine Conversion Tomorrow And Have Some Questions
Bump,
Hey did anyone run into a problem with the lower radiator hose? Mine gets folded over the frame rail with the passenger side bracket mounted. There is a small flange on the frame rail that looks like it is bent up that the lower hose rides over, I thought someone bent it but have seen other trucks with the front clip off on here and its bent on theirs as well. I may have the wrong hose on there to begin with, but have you guys run into this?
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"All tyranny needs to gain a foothold is for people of good conscience to remain silent." Thomas Jefferson "You are remembered for the rules you break." General Douglas MacArthur "Support Our Troops And The NRA" |
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#14 |
Registered User
Join Date: Oct 2008
Location: Brighton, TN
Posts: 1,267
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Re: Doing Serpentine Conversion Tomorrow And Have Some Questions
__________________
A computer once beat me at chess, but it was no match for me at kick boxing. Duct tape is like the force. It has a light side, a dark side, and it holds the world together. |
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#15 |
Registered User
Join Date: Feb 2000
Location: Center City, MN, USA
Posts: 3,254
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Re: Doing Serpentine Conversion Tomorrow And Have Some Questions
This site rocks. Thanks for all the tips. I'll have to try to tackle this swap this spring after the shack is off the lake and before I need to haul the boat around.
I suppose instead of drilling holes in my old heads I should send the vortecs I have on that suburban engine in to be gone through and install them. Then I'll need a different intake. I'm guessing this will be easier to do with the engine on a stand at which time I can do my 700r4 swap. I may as well use the 99 Suburban AC compressor and get some custom AC hoses made up while I'm in there. And it looks like I'll have to screw around with finding a lower radiator hose that will clear the serpentine bracket on that side. Should only cost me $2000 - $3000. We'll call it Matt's economic stimulis package. ![]() Seriously though. For you guys that drilled and tapped holes in your older heads, did you simply use the bracket as a template to drill?
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'70 cab, '71 chassis, 383, TH350, NP205. '71 Malibu convertible '72 Malibu hard top Center City, MN |
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#16 |
Never Ending Projects
Join Date: Jul 2006
Location: San Diego, CA
Posts: 3,836
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Re: Doing Serpentine Conversion Tomorrow And Have Some Questions
I used the bracket to and a transfer punch to mark the center for the needed hole. Then I made a guide out of 3/4" aluminum (drill on my press) so I would be drilling straight into the head. Took a mic to figure out how deep and taped the drill bit to meet that depth adding the 3/4" aluminum to the equation. After drilling, I used a starter tap and a bottoming tap to thread the hole.
When all said and done, it bolted up just like it was suppose to without any mods or clearancing needed. Here are a couple pics. ![]() ![]() ![]() ![]()
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. 1965 C10 Panel, ![]() 1968 Chevy C10, Long, Fleetside, Hot Rod Hauler http://67-72chevytrucks.com/vboard/s...d.php?t=313233 SOLD 1965 Chevy C10, Long, Fleetside, Hot Rod C10 http://67-72chevytrucks.com/vboard/s...d.php?t=415702 SOLD We were given two ears and one mouth for a reason... listen twice as much and speak half as often... |
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#17 |
Senior Member
![]() Join Date: Nov 2003
Location: Chicago, IL
Posts: 374
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Re: Doing Serpentine Conversion Tomorrow And Have Some Questions
I have the serp setup on my small block:
Buy the summit racing power steering kit, it is a great deal and has every fitting except a hose clamp. Buy a AN-6 hose clamp from Summit also. I believe the AC pump pigtail is DT142, don't quote me on that. Go to AC Delco and download their catalog and cross reference it. Then I bought mine on Ebay for $5 or so. |
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#18 |
Shake and Bake!
![]() Join Date: Feb 2010
Location: Central Coast, CA
Posts: 609
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Re: Doing Serpentine Conversion Tomorrow And Have Some Questions
Thanks for the help guys, I found upper and lower hoses that will work with some trial and error. Everything is almost finished, just need to refill the coolant and power steering tomorrow, check for leaks, double check re-torque all my bolts and I should be on the road, Woot woot!
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"All tyranny needs to gain a foothold is for people of good conscience to remain silent." Thomas Jefferson "You are remembered for the rules you break." General Douglas MacArthur "Support Our Troops And The NRA" |
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#19 | |
Registered User
Join Date: Feb 2009
Location: Oklahoma
Posts: 7,461
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Re: Doing Serpentine Conversion Tomorrow And Have Some Questions
Quote:
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#20 |
Shake and Bake!
![]() Join Date: Feb 2010
Location: Central Coast, CA
Posts: 609
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Re: Doing Serpentine Conversion Tomorrow And Have Some Questions
Finishing up today, and will post some pics when all done. Thanks again guys!
__________________
"All tyranny needs to gain a foothold is for people of good conscience to remain silent." Thomas Jefferson "You are remembered for the rules you break." General Douglas MacArthur "Support Our Troops And The NRA" |
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#21 | |
Registered User
Join Date: Feb 2000
Location: Center City, MN, USA
Posts: 3,254
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Re: Doing Serpentine Conversion Tomorrow And Have Some Questions
Quote:
Thanks.
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'70 cab, '71 chassis, 383, TH350, NP205. '71 Malibu convertible '72 Malibu hard top Center City, MN |
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#22 | |
Shake and Bake!
![]() Join Date: Feb 2010
Location: Central Coast, CA
Posts: 609
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Re: Doing Serpentine Conversion Tomorrow And Have Some Questions
Quote:
The lower has a couple numbers on it, the longer of the two is 61274 and the shorter one is 323. After trying a coulple of different ones it dawned on me that a 1986-88 or so, Chevy 1500 had the same serpentine setup as mine with the smog pump slot and the frame rail in the way. So we pulled one up for that and it fit perfect. Hope these help. Will ad some pics, when I get the fan in. Its a funny looking S shaped hose, with a larger flared end for the water pump side, but it fits sweet.
__________________
"All tyranny needs to gain a foothold is for people of good conscience to remain silent." Thomas Jefferson "You are remembered for the rules you break." General Douglas MacArthur "Support Our Troops And The NRA" |
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#23 |
Registered User
Join Date: Jun 2009
Location: Dub VC Utah
Posts: 364
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Re: Doing Serpentine Conversion Tomorrow And Have Some Questions
I must be lucky. When I did mine the only thing that I ran into was the lower radiator hose. Everything else bolted right up, even my dual alternator.
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'70 K10-- 4" lift on 35"s-- For Sale http://www.ksl.com/index.php?sid=733...iew&ad=4578305 |
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#24 |
Registered User
Join Date: Jan 2010
Location: Granite Falls, NC
Posts: 104
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Re: Doing Serpentine Conversion Tomorrow And Have Some Questions
I just cut off the lower half of the smog pump bracket and used a shorter belt without the smog pump delete pulley. Works great with stock hose.
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