Yet another factory tach question - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Slonaker · 07-18-2005, 08:40 AM

I found a factory tach in a '78 Blazer this weekend. It read 3500 rpm when I looked at it, without the engine running (junkyard truck). Is it safe to assume it was broken?

Slonaker

Slonaker · 07-18-2005, 10:47 PM

Bump!

**N2TRUX** · 07-18-2005, 11:09 PM

Probably. From what I have been told that is one sign that they are going bad. Is it in good condition besides that?

**Captkaos** · 07-18-2005, 11:40 PM

Ditto. That is can be a sign of it being bad. You can always test it. Crossy has a bench test for it I believe.

Slonaker · 07-19-2005, 09:10 AM

Quote:

Originally Posted by N2TRUX

Probably. From what I have been told that is one sign that they are going bad. Is it in good condition besides that?

I didn't look at it very closely because I thought it was broken. I was considering buying just because the place gets the same price for any two similar parts, whether one is more desireable than the other or not. I didn't have time to pull it, and forgot to ask what it would cost. It would probably be cheap, though.

I doubt it is still there now. The truck was dated 07/15/05, and was off in a corner. Someone else has probably found it by now. I was hoping for an answer yesterday so I could run out and get it after work.

Slonaker

NeCrOmAnCeR · 07-19-2005, 01:32 PM

Without power applied to the circuit ther eis no way to tell. After I turn my truck off mine will drift up too. Would be worth it to buy (if cheap) as long as it moves when power is applied it can usually be easily fixed.

If you look at past posts you will see that I have fixed tachs for a few members. Let me know if you need help with it.

Slonaker · 07-19-2005, 01:39 PM

Thanks. I'm trying to figure out how I can get out there to see if it is still available.

Slonaker

Jonboy · 07-19-2005, 02:08 PM

If you do decide to pick it up and don't use it, I would be interested in the cluster, working or not.

07-18-2005, 08:40 AM	#1
Slonaker Insert Witty Text Here Join Date: Oct 2002 Location: San Antonio, TX Posts: 3,415	Yet another factory tach question I found a factory tach in a '78 Blazer this weekend. It read 3500 rpm when I looked at it, without the engine running (junkyard truck). Is it safe to assume it was broken? Slonaker __________________ '86 Chevy C10 (Sold 04/19/13 ) Stock '01 Silverado

07-18-2005, 10:47 PM	#2
Slonaker Insert Witty Text Here Join Date: Oct 2002 Location: San Antonio, TX Posts: 3,415	Bump! __________________ '86 Chevy C10 (Sold 04/19/13 ) Stock '01 Silverado

07-18-2005, 11:09 PM	#3
N2TRUX Happy to be here Join Date: Mar 2000 Location: Cypress, TX Posts: 39,023	Probably. From what I have been told that is one sign that they are going bad. Is it in good condition besides that? __________________ Follow me on Facebook and Instagram @N2trux.com Articles- "Jake" the 84 to 74 crewcab "Elwood" the77_Remix 85 GMC Sierra "Scarlett" "Refining Sierra"

07-18-2005, 11:40 PM	#4
Captkaos www.73-87chevytrucks.com Join Date: Dec 1999 Location: Birmingham, AL Posts: 6,935	Ditto. That is can be a sign of it being bad. You can always test it. Crossy has a bench test for it I believe. __________________ Chris Lucas 1973 Chevy C-10 1978 GMC Jimmy (2WD) - SOLD 1987 R10 twin turbo LS 1991 R3500 SRW CrewCab 1985 K5 diesel swapped project 1989 K5 2WD conversion w/ Vette susp Project Captkaos Customs 73-87chevytrucks.com

07-19-2005, 01:39 PM	#7
Slonaker Insert Witty Text Here Join Date: Oct 2002 Location: San Antonio, TX Posts: 3,415	Thanks. I'm trying to figure out how I can get out there to see if it is still available. Slonaker __________________ '86 Chevy C10 (Sold 04/19/13 ) Stock '01 Silverado

07-19-2005, 01:32 PM	#6
NeCrOmAnCeR Registered User Join Date: Feb 2004 Location: Hodgenville, Ky Posts: 735	Without power applied to the circuit ther eis no way to tell. After I turn my truck off mine will drift up too. Would be worth it to buy (if cheap) as long as it moves when power is applied it can usually be easily fixed. If you look at past posts you will see that I have fixed tachs for a few members. Let me know if you need help with it.

07-19-2005, 02:08 PM	#8
Jonboy Slots go on anything! Join Date: May 2003 Location: Richardson, TX Posts: 5,957	If you do decide to pick it up and don't use it, I would be interested in the cluster, working or not. __________________ 1974 Jimmy- 5.3/4L80e/NP241

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