Topic: Help Needed - Strange clicking noise
in Forum: C3 Engines
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Lifetime MemberIndianapolis, IN - USA
Joined: 9/3/2006
Posts: 2429
Vette(s): Silver 1974 Convertible - L82 4 speed
Low miles (was only 8,900 when I bought it in March 2006) - Now 54K miles. Original owner bought it as an investment for son's college expenses.
2008 Jetstream Blue Convertible
Today, as the wife and I were leaving for a long (1,000+ miles) trip in my '74, we could hear a clicking/ticking noise coming from the dashboard.
Before we got too far, I got out and looked under the hood. Eventually, I determined that it sounded (and felt) like it was coming from the distributor. We debated for a few moments, and decided to risk it.
After not too long, we didn't hear it, and the car ran fine all afternoon (it did get hot once - see below).
Any ideas on what this could have been? I was somewhat afraid that this might cause us trouble on the road, but everything's good so far.
As for the temperature issue, it did get hot once, but cooled down after we got moving. On the '74, is there supposed to be a tube coming off of the overflow cap to go down in the resevoir? I can't remember, but when I checked it, I would think that it would be virtually impossible (other than by vacuum) to get water out of the resevoir and into the radiator without one.
Thanks in advance for the help folks!!
I wanted a Corvette my whole life, but I never dreamed of all the wonderful people I would meet because of it!
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Do you have a mechanical tachometer? If so, unhook the cable and see if the noise stops. Could just be the cable. Redwingvette 2008-05-18 17:15:16
Brian - NCM Lifetime Member
73 coupe L48, Flat-top pistons, Performer RPM Heads, Crane Cam and roller rockers, Holley 650 vac sec. Performer intake,
3.55 gear BTO 200-4R trans,
Leather seats, Seatbelt Plus 3point seatbelts, Pioneer CD player
Magnaflow Exhuast System
Dewitt radiator and dual electric fans
Borgeson Steering box
Lifetime MemberModerator
Duncanville, TX - USA
Joined: 11/8/2003
Posts: 20214
Vette(s): #1-1974 L-48 4spd Cp Med Red Metallic/Black deluxe int w/AC/tilt/tele./p/w-p/b/
Am-Fm/map light National/Regional/Chapter NCRS "Top Flight"
#2-1985 Bright Red/Carmine Cp.L-98/auto
Member: NCRS, NCRS Texas, Corvette Legends of Texas
Yeah...proll the tach cable tickin, or worse case the tach itself. Take the cable loose and lube it up. Sounds a lot easier than it is!
There should indeed be a section of hose on the overflow for the pull-back into the radiator. It may have fallen down in the tank...it happens.
There should indeed be a section of hose on the overflow for the pull-back into the radiator. It may have fallen down in the tank...it happens.
Joel Adams
C3VR Lifetime Member #56 
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"Money can't buy happiness -- but somehow it's more comforting to cry in a CORVETTE than in a Kia"
Lifetime MemberIndianapolis, IN - USA
Joined: 9/3/2006
Posts: 2429
Vette(s): Silver 1974 Convertible - L82 4 speed
Low miles (was only 8,900 when I bought it in March 2006) - Now 54K miles. Original owner bought it as an investment for son's college expenses.
2008 Jetstream Blue Convertible
I can't put into words how great this place is. I'm almost 200 miles from home and can still feel perfectly comfortable driving my 34 year old car.
Thanks guys so much!!
I wanted a Corvette my whole life, but I never dreamed of all the wonderful people I would meet because of it!
in Forum: C3 Engines
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