Pontiac GTO Forum banner
1 - 20 of 28 Posts

·
Registered
Joined
·
50 Posts
Discussion Starter · #1 ·
I have a problem getting my alternator belt aligned . The alternator needs to come out about 3/8"-1/2" in order to be corectly aligned with the pulley. I am using all the factory pulleys and factory alternator brackets. I tried using a double pulley on the alternator, but it sticks out too far.I am using an aftermarket 80 amp internal regulator alternator. I thought of putting a space behind the pulley, but I dont think I can move it enough to fix the problem.
Automotive tire Motor vehicle Bumper Rim Hood


Anybody have this problem. Its a 400 block.
 

·
Registered
Joined
·
2,137 Posts
to me .....
it looks like the
wrong water pump pulley
whats the number on that one ?? 481040 ???

looks like you need a longer power steering belt also ....

does the crank and water pump line up now ???
if so you probably have the 481038 and 481039 crank pulleys
you need the 68-70 ac crank pulleys 9799142 n 9799143 and water pump pulley for ac 9799128
to match your 67-70 power steering pump n brackets and your 70 only top alternator bracket

Scott


if
your using the 11 bolt timing cover
with
a 4.5" pump
 

·
Registered
Joined
·
50 Posts
Discussion Starter · #5 ·
to me .....
it looks like the
wrong water pump pulley
whats the number on that one ?? 481040 ???

looks like you need a longer power steering belt also ....

does the crank and water pump line up now ???
if so you probably have the 481038 and 481039 crank pulleys
you need the 68-70 ac crank pulleys 9799142 n 9799143 and water pump pulley for ac 9799128
to match your 67-70 power steering pump n brackets and your 70 only top alternator bracket

Scott
if
your using the 11 bolt timing cover
with
a 4.5" pump
[/QUOTE

Scott : Here is what I have :
#481040 2 groove Waterpump
#481038 2 groove Crank
#480509 1 groove Crank
The two Crank Pulleys were stacked on Crank ?

I have one spare Pulley: #10004850 2 groove Waterpump

Question : Does the Crank use 2 or 3 grooves with AC ?
The part numbers you gave me are only available as a full set for $500. I don't see anybody selling these used Pulleys.

Yes, I am using a 11 bolt 4.5" Waterpump.

Please Advise.
 

·
Registered
Joined
·
2,137 Posts
Scott : Here is what I have :
#481040 2 groove Waterpump
#481038 2 groove Crank
#480509 1 groove Crank
The two Crank Pulleys were stacked on Crank ?

I have one spare Pulley: #10004850 2 groove Waterpump

Question : Does the Crank use 2 or 3 grooves with AC ?
The part numbers you gave me are only available as a full set for $500. I don't see anybody selling these used Pulleys.

Yes, I am using a 11 bolt 4.5" Waterpump.

Please Advise.


---------------------------------------------------------------------------------------------------

500 is out of the question ..........
none of those work correctly for the 67-70 power steering set up you have
is your power steering pump pulley number 9786901 ??? thats the large ac pulley you need
then the crank pulleys DO stack single ac in the back also a plate or ring mounts to the front for reinforcement under the bolt heads,,,

 

·
Registered
Joined
·
2,137 Posts
yes 97'9'0842 its a typo on sellers side.... 9790842 and 43 for the crank
no
ok

buy this too
nicest cheapest on ebay
 

·
Registered
Joined
·
2,137 Posts
"What can I do about water pump pulley ? This Is my main problem in alternator misalignment ?"

FROM MY POST #2

"does the crank and water pump line up now ???
if so you probably have the 481038 and 481039 crank pulleys
you need the 68-70 ac crank pulleys 9799142 n 9799143 and water pump pulley for ac 9799128
to match your 67-70 power steering pump n brackets and your 70 only top alternator bracket "

YOU NEED A 9799128 water pump pulley

979 ..... and 48 ....... anything DO NOT line up with each other
the 481_ _ _ pulleys go with the 71 up power steering NOT the 70 power steering set up
 

·
Registered
Joined
·
50 Posts
Discussion Starter · #11 ·
Ok I ordered those two pulleys from ebay.I will check my power steering pulley tomorrow.Thank you for your help.
It amazes me how few people know anything about these cars.Most people I know with 1970 GTOs, know nothing about building them or repairing them.TC
 

·
Registered
Joined
·
2,137 Posts
nice !!

never heard of that number way too many number s ... post a pic ??

9786901 is correct ac 67-70 p.steering

does your pulley pump shaft have a nut n washer on the front ???

"
500 is out of the question ..........
none of those work correctly for the 67-70 power steering set up you have
is your power steering pump pulley number 9786901 ??? thats the large ac pulley you need
then the crank pulleys DO stack single ac in the back also a plate or ring mounts to the front for reinforcement under the bolt heads,,, "

Scott
2o6-4six5-9165
 

·
Registered
Joined
·
2,137 Posts
theres the clue !!!!!
1971 GTO 71 used the 71-78 style power steering pump n alternator brackets and pulleys

you are using =your 70 power steering pump ,.,,, n brackets that dont line up with 71 up pulleys
I have no idea what your ps pulley is from please double check the number seems wierd some one would change
that pulley
 

·
Registered
Joined
·
50 Posts
Discussion Starter · #16 ·
Are you saying a 1970 power steering bracket Is different than a 1971 ?
theres the clue !!!!!
1971 GTO 71 used the 71-78 style power steering pump n alternator brackets and pulleys

you are using =your 70 power steering pump ,.,,, n brackets that dont line up with 71 up pulleys
I have no idea what your ps pulley is from please double check the number seems wierd some one would change
that pulley
 

·
Registered
Joined
·
50 Posts
Discussion Starter · #17 ·
The pulley is definitely #123307601. I have attached a pic. The Power Steering pump and bracket were on the car when I bought it. The engine is a 1971, so I am guessing all the accessories are 1971. I changed the alternator bracket to a 1970, thinking that was the right thing to do, but it looks like I stepped into a hornets nest.
If I buy a new power steering pump for a 1970, does it come with the pulley ? Is my power steering pump bracket ok for a 1970 ?
Motor vehicle Automotive tire Automotive design Automotive fuel system Rim
 

·
Registered
Joined
·
2,137 Posts
"I changed the alternator bracket to a 1970, thinking that was the right thing to do,"
it is the right thing you have a 70??? correct ? plus the 71 up pump brackets are ALL different
and dont work with all the 70 stuff you have mounted now
 

·
Registered
Joined
·
2,137 Posts
"If I buy a new power steering pump for a 1970, does it come with the pulley ? Is my power steering pump bracket ok for a 1970 ?"

you have all 1970 pump parts n brackets parts EXCEPT the correct PULLEY
9786901
 
1 - 20 of 28 Posts
Top