Has anyone else has issue with T3's or any other aftermarket crank dampener with the depth being incorrect (too far out) and therefore the alternator belt and wp pulleys don't line up. Also the T3 pulley has marks at 12:00 which my ST is at 2:00. I think I have gotten a T3 FWD or even a MR2 dampener. Thoughts? I'm in the process of dealing with T3 now but they have not seen this issue which I find hard to believe.

There is a difference between RWD and FWD pulleys... not much... about
half a rib on the main pulley closest to the engine. While it is not ideal, there
does not seem to be a problem running either pulley if you are only running
one belt and using the pulley closest to the engine.



AFAIK the crank timing mark/notch on the main pulley should be the same
on RWD and FWD. Cam timing marks, if they exist, will be different. If you
are mixing FWD and RWD components you will have an offset problem.



The RWD water pump is taller than the FWD pump, and they use different
pulleys. The water pump pulley has to match the water pump you are using,
as the pump pulleys have different offset by at least a couple of ribs. So use
a RWD pump pulley with a RWD pump and FWD pump pulley with FWD pump
and they will line up with the crank pulley good enough

Cheers... jondee86

PS: The RWD alternator works OK with either combination. Not sure about
FWD alternator setup, as I have never used the FWD alt bracket on my car.

Thanks Jondee, you always seem to be helping people out.
I'll report back shortly but I have sent it back to T3 to take a look. It seems, when I eyeball it, if I used a RWD alternator that it would line up perfectly. As for the WP pulley, I did not try different combinations. I just hope I can retain my brand new FWD water pump and not have to switch over.

Just remember that you can't use the OEM viscous coupling fan on the
FWD water pump. No problem if you have electric radiator fans. But if you
want to use the OEM fan you need to use the RWD water pump as that has
a stronger bearing to hold the weight of the fan.

Cheers... jondee86

I take it that you also realise that the Blacktop 20V ones are different to everything else too.

From memory the BT 20V cambelt drive pulley is wider and the crank pulley is narrower,
so a mismatch of the wrong cambelt drive pulley will also put the alternator belts etc out of alignment.

matt dunn wrote:I take it that you also realise that the Blacktop 20V ones are different to everything else too.

From memory the BT 20V cambelt drive pulley is wider and the crank pulley is narrower,
so a mismatch of the wrong cambelt drive pulley will also put the alternator belts etc out of alignment.

Yea I've gone through almost every possible scenario in my head and possibility of what could be wrong but I actually ended up with 2 silvertop engines in a deal and they both have all the same parts we are discussing so I know they are OEM.

What I did was send it back to T3 with the OEM pulley and their exact response was. "... I machined the backside of our pulley since I didn't have a pulley that was the same as the one you sent me. I put a timing mark on the pulley to match the pulley you sent me. So they are now the same....."

This should work but it was a surprising answer to hear and an interesting situation that I'm not sure how to feel about. Let me reinforce, I'm using 100% Silvertop accessories/water pump.

SR85DET wrote:
This should work but it was a surprising answer to hear and an interesting situation that I'm not sure how to feel about. Let me reinforce, I'm using 100% Silvertop accessories/water pump.

Do you have a hydraulic timing belt tensioner or the usual spring tensioned idler.
The EPC shows a hydraulic tensioner in the diagram for my '94 AE101 with silvertop but has it as not applicable but the engine did run on in the Marino or Corolla Carrib when the blacktop was released so may have got the hydraulic tensioner.

It has a spring tensioned idler. I tried to post pics off my phone but the file size is too large. I'll be posting some soon. It's just so weird.

Original as shipped



T3s fix.

With a new timing mark cut into it.