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Old 08-10-2018, 09:21 AM   #1
jeffg1010
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Tricks and tips on cleaning up unnecessary wires & holes in the engine compartment

I recently started on the Blazer that Iíve owned for quite a while. Yeah I know, wrong forum... but there is a lot more activity in here so since they are the same under the hood Iím posting on here.

I hate under my hood. Itís a mess. Overspray, unused holes, loose and ratty wires. It looks like crap. So Iím starting there.

Can anyone share tips or tricks on how they cleaned theirs up? There is a lot going on in the firewall area so Iím not sure what all I can get rid of. Iíve never owned a welder but Iím considering getting one just so I can get rid of all those holes. What style do I need?

And of course, if youíre gonna talk about it, weíve gotta see some pics of yours!
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Old 08-10-2018, 09:26 AM   #2
LockDoc
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Re: Tricks and tips on cleaning up unnecessary wires & holes in the engine compartmen

-
This thread might give you some ideas...

http://67-72chevytrucks.com/vboard/s...d.php?t=659682

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Old 08-11-2018, 10:20 AM   #3
87Skier
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Re: Tricks and tips on cleaning up unnecessary wires & holes in the engine compartmen

When I first got my Jimmy, I redid all the underhood wiring since I was swapping to a newer gen I small block, needed a few extra wires, and was adding relays for headlights.

I moved the windshield wash wash hose (from tank) to a hole much closer to the wiring harness, then reused this spot for the oil pressure sender hardline.

I moved the fuel gauge sender wire to the rear light harness.

The front body wiring harness was moved to run through the fender along with the windshield wash hose.

The holes were filled with a grommet assortment like this one: Amazon
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Old 08-11-2018, 11:49 AM   #4
jeffg1010
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Re: Tricks and tips on cleaning up unnecessary wires & holes in the engine compartmen

Love the grommet suggestion. And less that ten bucks too!
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1972 Blazer CST 2wd- My son Sam's Project "S" Project "S"
1970 Suburban - SOLD "One Bad Burb" Photobucket Album
2010 Silverado 2500HD Crewcab - "Big Blue"


Members I have met: mikey531, gcburdic, bashed, burbman69, TonyPieras, Blazester, GCncsuHD, custombuilt67-72, tsnow678, highrpm, PanelDeland, tanman722001, 47thriftmaster, babyblueoval, 68stepbed, JesseWebb, Andy4639, xs-style, TobyArnot, BigOrange, frednoah, brn_agn, k5hart, Graham57a, bhelton, AJohn6, SilverC10, 69CST, '71 Flame, RaceAGMC, Liz, Josh, MattPSU, 68corvair, Chevy350V8, mdeal, ccrorymc, mrhurt73, dmxxpert, Custom68, 84GMC, BionicABs1, BigBlockBurris, Ebfabman, ATP...
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Old 08-11-2018, 12:01 PM   #5
Jason Banks
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Re: Tricks and tips on cleaning up unnecessary wires & holes in the engine compartmen

If you have a fairly stock situation still. I would order replacement harnesses. When you disconnect the wiring from the firewall it split's into 2 harnesses. One is the forward lamp harness and the other is the engine harness.

On mine I took the engine harness and cleaned it up with lacquer thinner and re-wrapped it with the non sticky black tape. I also fixed a couple wires and changed the wire for the HEI power. I ended up getting a new forward lamp harness because I thought it was going to take too long to clean up all the old spray paint from the areas not wrapped in tape. The forward lamp harness also connectors to the alternator and voltage regulator and the whole thing was pretty stiff. I figured a NEW harness would probably give me brighter lights and better charging.
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Old Yesterday, 10:55 AM   #6
jeffg1010
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Re: Tricks and tips on cleaning up unnecessary wires & holes in the engine compartmen

Quote:
Originally Posted by Jason Banks View Post
If you have a fairly stock situation still. I would order replacement harnesses. When you disconnect the wiring from the firewall it split's into 2 harnesses. One is the forward lamp harness and the other is the engine harness.

On mine I took the engine harness and cleaned it up with lacquer thinner and re-wrapped it with the non sticky black tape. I also fixed a couple wires and changed the wire for the HEI power. I ended up getting a new forward lamp harness because I thought it was going to take too long to clean up all the old spray paint from the areas not wrapped in tape. The forward lamp harness also connectors to the alternator and voltage regulator and the whole thing was pretty stiff. I figured a NEW harness would probably give me brighter lights and better charging.
More good info Where are you ordering your forward lamp harness?
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1972 Blazer CST 2wd- My son Sam's Project "S" Project "S"
1970 Suburban - SOLD "One Bad Burb" Photobucket Album
2010 Silverado 2500HD Crewcab - "Big Blue"


Members I have met: mikey531, gcburdic, bashed, burbman69, TonyPieras, Blazester, GCncsuHD, custombuilt67-72, tsnow678, highrpm, PanelDeland, tanman722001, 47thriftmaster, babyblueoval, 68stepbed, JesseWebb, Andy4639, xs-style, TobyArnot, BigOrange, frednoah, brn_agn, k5hart, Graham57a, bhelton, AJohn6, SilverC10, 69CST, '71 Flame, RaceAGMC, Liz, Josh, MattPSU, 68corvair, Chevy350V8, mdeal, ccrorymc, mrhurt73, dmxxpert, Custom68, 84GMC, BionicABs1, BigBlockBurris, Ebfabman, ATP...
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Old Yesterday, 02:05 PM   #7
OregonNed
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Re: Tricks and tips on cleaning up unnecessary wires & holes in the engine compartmen

Between replacing wiring that was cobbled together, (with the right gauge and color), and routing between the driver side inner and outer fenders, I was able to clean things up quite well. Wires were laying across everything, including the spark plug wires. The wire gutters on the firewall and at the radiator were replaced. This is as clean as I have made it so far.
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Old Yesterday, 02:16 PM   #8
ncpetersc
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Re: Tricks and tips on cleaning up unnecessary wires & holes in the engine compartmen

Quote:
Originally Posted by OregonNed View Post
Between replacing wiring that was cobbled together, (with the right gauge and color), and routing between the driver side inner and outer fenders, I was able to clean things up quite well. Wires were laying across everything, including the spark plug wires. The wire gutters on the firewall and at the radiator were replaced. This is as clean as I have made it so far.
That is super clean.. nice work. May my engine bay look 1/10th as nice someday!
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Old Yesterday, 08:47 PM   #9
jeffg1010
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Re: Tricks and tips on cleaning up unnecessary wires & holes in the engine compartmen

Quote:
Originally Posted by OregonNed View Post
Between replacing wiring that was cobbled together, (with the right gauge and color), and routing between the driver side inner and outer fenders, I was able to clean things up quite well. Wires were laying across everything, including the spark plug wires. The wire gutters on the firewall and at the radiator were replaced. This is as clean as I have made it so far.
Oh my ... this is why I made this thread. Motivation.

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1972 Blazer CST 2wd- My son Sam's Project "S" Project "S"
1970 Suburban - SOLD "One Bad Burb" Photobucket Album
2010 Silverado 2500HD Crewcab - "Big Blue"


Members I have met: mikey531, gcburdic, bashed, burbman69, TonyPieras, Blazester, GCncsuHD, custombuilt67-72, tsnow678, highrpm, PanelDeland, tanman722001, 47thriftmaster, babyblueoval, 68stepbed, JesseWebb, Andy4639, xs-style, TobyArnot, BigOrange, frednoah, brn_agn, k5hart, Graham57a, bhelton, AJohn6, SilverC10, 69CST, '71 Flame, RaceAGMC, Liz, Josh, MattPSU, 68corvair, Chevy350V8, mdeal, ccrorymc, mrhurt73, dmxxpert, Custom68, 84GMC, BionicABs1, BigBlockBurris, Ebfabman, ATP...
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