Loose + battery terminal - ZR-1 Net Registry Forums

SC UL8R1990 · 08-07-2008

Hi folks, my dads ZR-1 seems to have some ongoing issues with the positive battery cable bolt. Even when it is decently tight it seems like there is a crap connection to the battery. I also noticed the negative cable has a much larger bolt going into the battery.....why not the postive also? Any way to upgrade it?

It just seems that the little 5/8" bolt barely makes contact.

Any and all suggestions appreciated.

SC UL8R1990 · 08-07-2008

nevermind, im a moron. bolt is the same size....however the head of the bolt is a deifferent size, kinda dumb.

DaveK · 08-07-2008

Quote:

Originally Posted by SC UL8R1990

nevermind, im a moron. bolt is the same size....however the head of the bolt is a deifferent size, kinda dumb.

They're the same size on mine - just replaced the battery a couple of weeks ago. Could be someone has put in a mis-sized replacement perhaps.

ZR1FUN · 08-08-2008

I thought the cable connection bolt to the battery was like 5/16 (small size near this) and they were both the same. The last time I had an experience with two different size battery cable bolts like this, someone had drilled out the one cable to fit a larger bolt thru the cable.

tomtom72 · 08-08-2008

on my 90 the positive and negative attachment bolts are both 5/16" heads.

I think there is a bit of fussing to connect both terminals as they have ridges that inter-lock like gear teeth. If you don't get them to mesh, then the bolt can't hold the cable end to the terminal securely. JMHO.

A26B · 08-08-2008

Quote:

Originally Posted by SC UL8R1990

Hi folks, my dads ZR-1 seems to have some ongoing issues with the positive battery cable bolt. Even when it is decently tight it seems like there is a crap connection to the battery. I also noticed the negative cable has a much larger bolt going into the battery.....why not the postive also? Any way to upgrade it?

Yes, go to Autozone, O'Reilly's or Advance and purchase the standard, OEM replacement battery bolt which has a 5/16" hex head. In the tools section, they usually have a handy little battery wrench with a racheting, box head.

The threads in the battery are blind tapped and shallow. Sounds like the bolt you are using is a tad too long. If so, it will bottom out in the battery threads, leaving the cable "loose".

Jerry

SC UL8R1990 · 08-08-2008

great, thanks for the tips folks.

Z51JEFF · 08-24-2008

[IMG]

[/IMG]Whatever you do dont crank down too much on the battery bolt,you could end up with this.Funny how the guy that I paid to inspect the car failed to notice this,or the guy that sold it too me didnt mention it either.The battery lug will break off the battery and acid will go everywhere.It was so extensive on my car that it ran down into the rocker panel and out the back.Heres a shot AFTER I fixed it.[IMG]

[/IMG]

08-07-2008	#1
SC UL8R1990 Join Date: Feb 2004 Posts: 36	Loose + battery terminal Hi folks, my dads ZR-1 seems to have some ongoing issues with the positive battery cable bolt. Even when it is decently tight it seems like there is a crap connection to the battery. I also noticed the negative cable has a much larger bolt going into the battery.....why not the postive also? Any way to upgrade it? It just seems that the little 5/8" bolt barely makes contact. Any and all suggestions appreciated.

08-07-2008	#2
SC UL8R1990 Join Date: Feb 2004 Posts: 36	Re: Loose + battery terminal nevermind, im a moron. bolt is the same size....however the head of the bolt is a deifferent size, kinda dumb.

08-08-2008	#4
ZR1FUN Join Date: Sep 2006 Location: Olympia Posts: 162	Re: Loose + battery terminal I thought the cable connection bolt to the battery was like 5/16 (small size near this) and they were both the same. The last time I had an experience with two different size battery cable bolts like this, someone had drilled out the one cable to fit a larger bolt thru the cable.

08-08-2008	#5
tomtom72 Join Date: Dec 2004 Location: Jacksonville, FL USA Posts: 4,645	Re: Loose + battery terminal on my 90 the positive and negative attachment bolts are both 5/16" heads. I think there is a bit of fussing to connect both terminals as they have ridges that inter-lock like gear teeth. If you don't get them to mesh, then the bolt can't hold the cable end to the terminal securely. JMHO. __________________ 1990 ZR-1, Black/grey, #2233, stock. ZR-1 Net Reg Founding Member #316 & NCM member

08-08-2008	#7
SC UL8R1990 Join Date: Feb 2004 Posts: 36	Re: Loose + battery terminal great, thanks for the tips folks.

08-24-2008	#8
Z51JEFF Join Date: Dec 2007 Location: Fremont,Ca Posts: 3,046	Re: Loose + battery terminal [IMG][/IMG]Whatever you do dont crank down too much on the battery bolt,you could end up with this.Funny how the guy that I paid to inspect the car failed to notice this,or the guy that sold it too me didnt mention it either.The battery lug will break off the battery and acid will go everywhere.It was so extensive on my car that it ran down into the rocker panel and out the back.Heres a shot AFTER I fixed it.[IMG][/IMG]