If i switch my two belt serpentine and vbelt to the newer one belt system from 89--->
do i have to change my waterpump???

 

Yes, you will need the serpentine water pump. Think its the "Long" pump.

 

All these water pumps are "long" water pumps. GM stopped using the "short" water pump in the 1960's.

But yes - to swap to serpentine, you HAVE to have:

Serpentine (reverse flow) water pump
Alternator - yours won't attach to the serp brackets
Smog Pump - again, yours won't attach to the serp brackets
P/S pump - again, your will not attach to the serp brackets
A/C compressor - again ...

In other words - IT AIN'T WORTH IT!!!!

There's NOTHING advantageous about the serpentine setup at all. IN FACT, it's a disadvantage! If your serp belt breaks, you stop right there - no alt, no water pump! If your V-belt breaks, you can limp home, since the V-belt system puts more than 1 belt across the water pump, no matter which belt breaks, you always have a water pump (assuming only one belt breaks).

I had serp system in my 1992 - I hated it - I yanked it all out when I went carbed and deleted my A/C, and went with the V belt system (and yes I replaced everything to do it). Trust me - stick with what you have - you're much better off!

 

Strong words... I have to buy AC and smog deletes and pay for setup and reclock alternator..and PS pump... plus I have a team g weiland high performance pump that was expensive

 

The reason I had "long" in quotes, was that it is the longer version than the v-belt setup. I forgot it was called the "reverse" pump. I had to replace my A/C compressor already and I had a serp P/S pump laying around. I got everything I needed at pull-a-part for $30.00. There are definate advantages to both systems. I carry a breaker bar and a spare belt. all I need to change it. With the v-belt setup, if something siezes, you can continue for a while.
The main reason I switched is looks. I just like the clean look of the serp system.

 

Yep - sorry bud ... but it's a PITA to swap either direction. Like mentioned - maybe you can get decent used parts at JY - but it all has to be changed out to go from V to serp and visa versa.

 

Me too--along with the fact that I wanted to run an STB (a driver's side compressor brace on my old set-up interfered). The following link contains the manual and parts info of the GM kit I purchased. Perhaps those will benefit someone.

https://www.thirdgen.org/forums/afte...rsion-kit.html

JamesC

 

Serp is nice if parts are in tact I suppose - but given I yanked out A/C and smog pump, serp brackets were just huge, bulky, and ugly to me.

 

Hmm!

I did a serp. conversion on my 82 T/A after loosing the A/C
v-belt on more then one occasion when 'romping' on the
throttle. I no longer have the LOUD clutched fan noise when
revving the motor and, it looks so much nicer. I got the
brackets from a parts car, sand blasted and painted. I would
recommend the conversion. Am running A/C and a smog
delete pulley. The water pump is reverse flow.

Some pics here
http://transam.planetjupiter.com/

 

If I didn't have the A/C and smog pump, I probably would have stayed with the v-belt setup. I like the fact that the A/C hose is all on the passenger side now and not strung out all over the engine bay.

 

I PULLED MY ENTIRE A/C SYSTEM. BA---BYE....