View Full Version : Another serpentine question
Southtwnr Jul 20th, 06, 10:35 AM I may be getting the brackets/pulleys (no accessories) from a 96-99 5.7 chevy truck in order to perform a serpentine conversion. I have done a search, but there is almost too much info and its a little confusing! So, I have a couple of questions:
1) My engine is not original and my heads are from a corvette (around 1988, I think. I do have accessory holes). I am pretty sure I will have to buy a water pump due to rotation/flow issues, but what models should I be looking for?
2) I know the fitting on the back of the power steering pump is different, but will mine still bolt up if I swap the pulley?
3) I plan on updating the alternaor soon, but will my older style bolt up?
Thanks,
Jason
Go69 Jul 20th, 06, 10:54 AM Your old power steering pump should bolt up to the bracket (as long as the new brackets still use the old style pump). Or, you can unscrew that fitting from your old pump, and screw it into the new pump-again as long as both pumps are of the same style.
You will need a reverse rotation water pump (1995 GMC truck with 350 will work), and if you have a mechanical fan-remember that you will need a reverse rotation fan as well! If you have an electric fan you will be alright.
On the alternator-I don't think your old style will bolt up. The newer ones are smaller and the mounting tabs are in different locations. Plus the newer, smaller alternators usually put out a lot more amperage than our older style units. Win/Win situation going with the newer one.
Southtwnr Jul 20th, 06, 06:05 PM Thanks Go69
Southtwnr Jul 21st, 06, 08:22 AM has anyone used the system from this paticular model? Any comments on placement/fitment of the accessories? here is the one im looking at.
Thanks
http://cgi.ebay.com/ebaymotors/Serpentine-Belt-Set-up-for-Small-Block-V-8-Chevys_W0QQitemZ290007996810QQihZ019QQcategoryZ386 56QQssPageNameZWDVWQQrdZ1QQcmdZViewItem
Go69 Jul 21st, 06, 10:22 AM In the picture, the bracket on the right is for the power steering pump, and the alternator. It is upside down in the picture-the side that you see is the side that goes against the block. That is the EXACT bracket that I have on my car. Since I don't have A/C at this time, I only used the bracket on the right for the P/S, and Alt. I used a belt tensioner off a late LS1 equipped Camaro and everthing else falls in place.
One thing to think about-have you checked the price on serpentine belts lately? I just purchased a Serp. belt for a 4.3L (2000 Blazer) which is the same set-up and the belt alone was OVER $40.00! I can't believe they expect that kind of money for a simple belt. Luckily, it turns out the customers water pump bearings were shot and that was causing the squealing, and not the belt. I returned the belt, ordered the pump-AND GOT MONEY BACK! The pump was cheaper than the belt..
So, unless you just have to have a serpentine system, the old V-belts work fine, cost less, and are normally trouble free. With a serp. system you can expect that you will have to replace the tensioner over time as they are "wear" items.
Plus, if you want really cool aluminum pulleys later-there is a much larger selection in the V-belt line than in the serp. line (unless you buy an entire package from one of the suppliers, then you get their brackets, mounting hardware, and all pulleys at a very high price).
DZcode Jul 23rd, 06, 06:46 AM I did the serpentine swap to my 406 with edelbrock aluminum heads. The bracket mounting holes all lined up perfectly. (Engine not running yet.)
The old power steering pump will fit the bracket, but the pump shaft is thinner and was keyed to the old style v belt pulley. The serpentine pulley requires a thicker pump shaft, there's no key so it's a press fit.
I went ahead and bought a remanufactured pump to get the correct shaft for the serp pulley and swapped the valve/fitting from the back so the old style hose fitting would work. Make sure to borrow the pressing tool from the parts store. The nut and bolt tool that comes with the new pump is grade 5 and I broke mine half way through install. Also, mount the pump on the bracket first since the mounting bolts are behind the press on pulley.
I could not find a reverse rotation water pump with a heater hose fitting. (The corvette pump has one, but that pump is the short version) I'm basing my swap on a 4th gen camaro and that hose returns to a fitting on the radiator -- that we first geners don't have. Anyway, I will return the large heater hose to the passenger side head. I put a 90 degree fitting in there and a water nipple. Fits properly between the header tubes.
Not sure if you want the new alternator, but this link shows a set up in an old chevelle. http://www.chevelles.com/techref/ftecref14.html
The new alternators are expensive at about $100, but they put out over 100 amps. I need to use the new one since I'm installing EFI.
I'm running an AC delete pulley until I install AC and I'm using the modified belt run to bypass the smog pump which I left out. This uses a longer belt. http://www.thirdgen.org/serpentine
Southtwnr Jul 24th, 06, 06:24 AM Thanks for all the info. It doesnt seem like this will be as easy/inexpensive as I thought, but what is these days!!
Thanks again
jason
BonzoHansen Jul 24th, 06, 11:49 AM I am half way through this on my 77. I got a setup off a late 80s f-body, including AC, Alt (CS-130) & PSP for $100. Here is what I know to date:
*I blasted the brackets, the additional supports, and all the bolts. I black oxided the bolts. The pullies were actually pretty nice, so I cleaned them & and will bolt them on. The 2 big brackets bolted up nice, although the RH head does not have an extra bolt hole newer heads must have. But I am not worried about one bolt. I painted all the additional supports with POR15, but I will likely not use them. With the big bracket, the alternator is better supported than the stock one was in my 77, so they are out. The AC side bracket would need help to make up for no exhaust manifolds. I will decide about that one after the AC is done.
*I got an air pump delete pulley from a guy on nastyz28 for $25 shipped. I thought the run was a bit long without it. GM agrees, based on their GMPP kit. But a lot of 3rd gen guys have no issues with just pulling the pump, so it is user preference. Also, I think my install will look better with this pulley than without.
*There is supposed to be one bolt that goes through the RH bracket, air pump, the RH bracket again, and then into the block. The delete pulley I got is threaded (oddly, GM makes you order this bolt separately form the delete kit), so I will be making a stud for it using a length of threaded rod that I will cut down to size & use a nut on it to bolt the bracket to the engine. With the other accessory hole missing on that side, I figure I better install this one. I could probably use a cap screw, but where is the fun in that?
*The tensioner bolt is a T55. Note that most sets only go to T50. I think the rest are T40s and T45s.
*Regarding belt selection, you do need to make sure the tensioner is in the allowable range with the belt installed. I’ll get back on that one.
*I got a RR water pump for a 90 IROC as well. My new radiator has a heater hose connection on the RH tank, so I will use that, which is good as I never even gave this a consideration.
*I have 1995 LT1 electric fans with a DCC controller going in, so no fan issue for me. But the reverse fan change would be correct.
*I had to clock the alternator to clear the tall valve cover; probably no issue with regular covers. I still have to clean the alt & have it tested. Call MadElectric or American Autowire for help on revised wiring. BTW, a lot of the 3rd gen guys scrap that alt when it dies for a later model (4th gen?) one that is supposed to be an improved unit (more power, more reliable). The kid down the street from me did this in his 91 GTA. I’ll get a pic & info when I see him again.
*I am going to run the R4 AC compressor. I have a nice core, I suppose. :) I need to have lines fabbed, so I will take it to an AC shop in the spring. You can get an AC delete pulley over the counter, MotorMite/Dorman makes them. Most of the aftermarket AC systems can be easily adapted to the R4, from what I have read.
*The brackets & the stock mechanical fuel pump appear to be able to co-exist, but a custom fuel line is necessary. I am using this as an opportunity to learn how to bend & flare lines. I plan on placing the FF behind the AP delete pulley in the cavity where the AP used to sit. (TMK, no GM vehicle with a serp setup has a mech FP). I will fab up a mounting bracket for the FF, maybe using the aforementioned stud. This may also have been easier if I had used an aftermarket pump and not a stock replacement. But my 77 includes a return line (all AC cars & Vettes had this to help prevent vapor lock), so I kept the stock setup.
*I was just getting to the PS pump when my compressor crapped out. So I can’t tell you that yet. I will be using an 1985 pump that went with the steering box I got out of low mileage 1985 WS6 Trans Am. I just have to swap the pulley. This will be done very soon after my compressor purchase. I can report back at that time. (no air, no pulling a pulley at my house)
Pics & PS info when I get to that point.
BonzoHansen Jul 24th, 06, 09:16 PM Here, I decided to mess with the fuel line tonight. Here is the first pass on it.
Here is the front of the engine mocked up. Notice the threaded rod sticking out under the AC. That is the one I mentioned before. I'm still wondering about that upper hose.
http://img.photobucket.com/albums/v359/SIBLY/My77Z28/th_IMG_3113_Acc01.jpg (http://img.photobucket.com/albums/v359/SIBLY/My77Z28/IMG_3113_Acc01.jpg)
Here is how I am thinking of mounting the fuel filter. It is 3/8 line, I found a filter at Pep Boys that is barbed on the outlet and NPT on the inlet. I'd like to fab up a braket/heat sheild in there somewhere. Of course, this might change 100% when the engine goes in the frame.
http://img.photobucket.com/albums/v359/SIBLY/My77Z28/th_IMG_3112_FuelPump1.jpg (http://img.photobucket.com/albums/v359/SIBLY/My77Z28/IMG_3112_FuelPump1.jpg)
This is why I decided to do this tonight, since I have nothing else to do w/o a compressor. How is this for my first (ok, 3rd) double flare?
http://img.photobucket.com/albums/v359/SIBLY/My77Z28/th_IMG_3123_FuelPump2.jpg (http://img.photobucket.com/albums/v359/SIBLY/My77Z28/IMG_3123_FuelPump2.jpg)
Southtwnr Jul 25th, 06, 11:23 AM thanks for the pics! Everything looks great!
BonzoHansen Jul 25th, 06, 02:58 PM Thanks. I know the engine is the wrong color for this site. :)
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