ZZ4 Timing problems
Thread Starter
Racer
Joined: Sep 2005
Posts: 304
Likes: 1
From: Carson City Nevada
ZZ4 Timing problems
HI all, I am having trouble with timing on my new ZZ4 in my 87. I had to change the damper with the L98 one due to size. I also changed the timing cover with it. Was this a mistake? Was the ZZ4 damper(that I no longer have) and timing cover diferent?
Le Mans Master
Joined: Aug 2000
Posts: 8,838
Likes: 31
From: Australia
So long as you have a L98 cover to go with the L98 balancer the indicated timing should be right.
Different balancer/ timing marks used across years, also has to be correct for balancer size also
What problems are you having?
Did you play with the timing chain?
Different balancer/ timing marks used across years, also has to be correct for balancer size also
What problems are you having?
Did you play with the timing chain?
Last edited by rodj; Sep 4, 2007 at 04:58 AM.
Thread Starter
Racer
Joined: Sep 2005
Posts: 304
Likes: 1
From: Carson City Nevada
No, I didnt mess with the timing chain. Unfortunatly, I no longer have the ZZ4 cover of balancer. The old balancer was larger and the timing cover was plastic. Anyone got any pics of one?
Burning Brakes
Joined: Aug 2001
Posts: 1,146
Likes: 9
From: Troy Ohio
Looked the same to me
I also transferred the balancer over but left the timing cover that came on the zz4 on the motor. When i compared them the timing mark looked like it was in the same position just a little farther away from the balancer due to its smaller diameter compared to the one that came on the new motor.
Thread Starter
Racer
Joined: Sep 2005
Posts: 304
Likes: 1
From: Carson City Nevada
I also transferred the balancer over but left the timing cover that came on the zz4 on the motor. When i compared them the timing mark looked like it was in the same position just a little farther away from the balancer due to its smaller diameter compared to the one that came on the new motor.
Pro
Joined: Dec 1999
Posts: 673
Likes: 0
From: Venetia,Pa,USA
I had to change my damper also , would not clear the crossmember. The timing is the same , the problem is that the pointer has to be relocated because it no longer points correctly. What I did was set the dist in and adjusted the timing until I had the engine running smooth. I did the timing adjustments on the dyno by increasing and decreasing until I got the max. HP. When I ever need to replace the water pump/pwr steering or anything behind the pulleys I'll set the engine to TDC and fab a pointer to point at "0" degrees ; then I'll be able to time with a light. It runs fine I don't look for work. If you have any questions you are weclome to call me at home . 724 941 3792
Thread Starter
Racer
Joined: Sep 2005
Posts: 304
Likes: 1
From: Carson City Nevada
You don't happen to know how many degrees and in wich direction do you? It seems I have to set mine at about 2 deg after TDC to get the ping to go away. It also seems I lose some HP when I do that.
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!
Joe Kucinski
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter
Joe Kucinski
8 Coolest Corvette Pace Cars (and Replicas) of All Time
Verdad Gallardo
Top 10 Corvette Engines RANKED by Peak Torque (70+ Years of Muscle!)
Joe Kucinski
Corvette ZR1X Will Be Pacing the Indy 500, And Could Probably Race, Too!
Verdad Gallardo
Top 10 Corvettes Coming to Mecum Indy 2026!
Brett Foote
Top 10 C9 Corvette MUST-HAVES to Fix These C8 Generation Flaws!
Michael S. Palmer
10 Revolutionary 'Corvette Firsts' Most People Don't Know
Joe Kucinski
