Thunderbolt IV Distributor Gear

[Mkos1980]

Is this gear ok for roller applications as well. I looked up the part number for the IV and V and the gear PN is the same. I know that the V used a roller cam.

 

[Don S]

Re: Thunderbolt IV Distributor Gear

the gear PN is the same.

Yes,they are the same, unless of course Mercruiser uses the same PN for 2 different gears. Then I guess you just have to keep ordering till you get one that will work.

 

[John_S]

Re: Thunderbolt IV Distributor Gear

The "melonized" gear is used on both T4 and T5 distributer, and not all T5 distributers were used with roller cams.

I had a harder time finding the fuel pump rod that was compatable with the roller cam. Merc has discontinued it, and had to get one from a speed shop.

 

[96lt4c4]

Re: Thunderbolt IV Distributor Gear

I have not had any problems with the Thunderbolt gear on the Vortec roller cam. Just stab it in and run...

 

[Bondo]

Re: Thunderbolt IV Distributor Gear

Ayuh,...

My 4.3LX is a T-Bolt IV,+ a rollercam,....

 

[Mkos1980]

Re: Thunderbolt IV Distributor Gear

I had a harder time finding the fuel pump rod that was compatable with the roller cam. Merc has discontinued it, and had to get one from a speed shop.

Ah HA. I was assuming these were all interchangable. Which one do I need. Summit is down the street from me and they ahve two kinds. ARP's and Cranes Chromemoly Units or Comps steel with bronze tips?