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09-20-2018, 11:32 AM | #1 |
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Location: East Tennessee
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serpentine question
I'm upgrading my K/5 350 to a serpentine belt drive system...
Piecing together some used brackets and pulleys I found for $50 So far I bought a new reverse rotation water pump, and an alternator Also bought a new tensioner assembly... When I put the tensioner onto the bracket..the belt-wear indicator seems to be too far down in the bracket and the pulley looks to be about 1/16" to 3/32" further back than the adjacent idler... There is a tang on the back of the tensioner that fits into a corresponding hole in the bracket to prevent it from rotating... Is there a thin spacer or shim that should be behind the tensioner?
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1967 C10 Step side 1968 C10 Step side 1970 Chevrolet K/5 Blazer 1972 Chevrolet K/5 Blazer ............. |
09-21-2018, 07:37 PM | #2 |
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Re: serpentine question
You may run into problems if all the pieces are from different vehicles or different years. I was piecing together the same thing with pieces from 1989 and 1995, and found that the pulleys didn't line up. About the engine you're putting this on; did it originally have a short or long water pump? If it originally had a short pump, and your CCW pump will be a long pump (if it is a stock pump for a serpentine equipped engine) then things will definitely not line up.
Also, don't forget that you will need a CCW fan as well.
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Bob 1967 2wd Burb, 350/TH350, 3.73 posi |
09-21-2018, 11:29 PM | #3 | |
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Re: serpentine question
If a small block originally had a SWP and you change to a LWP, that does not automatically mean none of the pulleys will line up. If you try and use SWP pulleys with a LWP, then yes, but not of you change all of the pulleys and brackets to the correct components as the OP seems to be doing.
Quote:
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09-22-2018, 01:06 AM | #4 | |
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Re: serpentine question
Quote:
Piecing together some used brackets and pulleys I found for $50". When you buy a box of parts, you have no idea if they all came off the same engine and will work together. Or he could be lucky and everything will work OK.
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Bob 1967 2wd Burb, 350/TH350, 3.73 posi |
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09-22-2018, 09:22 AM | #5 | |
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Re: serpentine question
Quote:
I also got the correct fan and all the pulleys as well... I also just bought a new reverse rotation water pump..... from several images that I've found online...everything appears to be matched with what I have. it's just that the tensioner doesn't look exactly right..... once I get it on the motor I will be able to get a better perception of it... It looks exactly like this picture I found online
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09-22-2018, 10:16 AM | #6 |
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Re: serpentine question
Good, then you should be OK. Remember that the harmonic balancer on the serp belt system may be 1/2 inch thicker than one from an older V-belt system. Also, I would replace both the idler and tensioner pulleys. They're not expensive and to have one seize up is not good.
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Bob 1967 2wd Burb, 350/TH350, 3.73 posi |
09-22-2018, 10:20 AM | #7 |
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Re: serpentine question
Went in the garage and looked at my set up off a 93 GMC. Looks about the same as your set up.
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09-22-2018, 10:41 AM | #8 | |
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Re: serpentine question
Quote:
I may hit you up for a few more if you don't mind... I can figure most of it out....but there's a couple of round braces and a sheet metal brace that I'm not sure about They may or may not belong to this set up...?
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09-22-2018, 10:59 AM | #9 |
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Re: serpentine question
The sheet metal brace is for the rear of the P/S pump.
One round brace goes from the rear of the A/C bracket back to the intake manifold. On some versions a round brace goes between the two? (I think?) If running a vortec intake I leave the manifold brace off. I think it puts undue strain on already weak gaskets Pic of mine that I modded for Vortec: |
09-22-2018, 11:03 AM | #10 |
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Re: serpentine question
If you are running Rams horns you have to mod the P/S bracket
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09-22-2018, 11:10 AM | #11 |
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Re: serpentine question
I do have the ram's horn manifolds
So you just cut it and welded a piece in...? Looks easy enough Thanks for all the help/replies that make it so much easier...than just jigsaw puzzling...!
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