Knowledgable 389 tech in LA Valley area? - Pontiac GTO Forum
User Tag List

 
LinkBack Thread Tools Display Modes
post #1 of 6 (permalink) Old 07-10-2008, 01:56 AM Thread Starter
 
Join Date: Jul 2008
Posts: 6
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Knowledgable 389 tech in LA Valley area?

I was just curious if anyone could steer me towards a decent tech whose had more experience working on a 389. I know it has always run hot, but I just had the engine rebuilt and I thought that would help with the problem. My current mechanic is having a heck of a time trying to get it running just right. Maybe someone with a little more experience can help me get her back on the road.

I'm in the San Fernando Valley area...
Thanks, BB
billie bob is offline  
Sponsored Links
Advertisement
 
post #2 of 6 (permalink) Old 07-10-2008, 11:48 AM
Administrator
 
05GTO's Avatar
 
Join Date: Oct 2004
Location: Deliverance, GA
Posts: 5,139
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 11 Post(s)
BB,

Here are a couple things to check that may help;

Pull the radiator hose off of the t-stat housing and see if the t-stat is upside-down, happened to mine. The spring should be on the bottom.

Measure the distance between the fan blades and the radiator fins, use a Mr. Gasket fan spacer (available from 1/2" to 2 1/4") and move the fan closer to the radiator. Fan Spacers can be found at your local auto parts store.

Did you get the pinging problem fixed?

Randy



Last edited by 05GTO; 07-10-2008 at 11:59 AM.
05GTO is online now  
post #3 of 6 (permalink) Old 07-10-2008, 11:35 PM Thread Starter
 
Join Date: Jul 2008
Posts: 6
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Thanks 05GTO,
The pinging is still the major issue. We have tried with a t-stat, without one, even drilled holes in one and tried it. Still too hot.
Tried retarding the timing, but only get less power at low speed and still too hot..
We are going to move the fan up closer to the rad, and we discussed blocking all other gaps around the shroud. It has a triple core radiator. He says he is going to put a 4 core in and try that too.
Going to convert from points to electronic.

My mechanic is cool and is letting me leave it with him for awhile so he can play with it...
I guess I'm just hoping that there may be some magician out there who could perform some magic on it.? I may have to find an old lantern somewhere and shine it up.
BB
billie bob is offline  
 
post #4 of 6 (permalink) Old 07-11-2008, 12:08 AM
Administrator
 
05GTO's Avatar
 
Join Date: Oct 2004
Location: Deliverance, GA
Posts: 5,139
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 11 Post(s)
Also, check the lower radiator hose to verify that it is not collasping, was the water pump changed during the rebuild and was the radiator cleaned and restored by a radiator shop? Re: timing, How old is the gas in the tank, could it be bad? Have you checked the vacuum and was the block decked or the heads shaved?

Randy



Last edited by 05GTO; 07-11-2008 at 12:39 AM.
05GTO is online now  
post #5 of 6 (permalink) Old 07-11-2008, 08:32 AM
Former Super Moderator
 
Rukee's Avatar
 
Join Date: Feb 2007
Location: South Central Wisconsin
Posts: 9,919
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 21 Post(s)
There really should be plenty of cooling there. Are you taking an actual temp of the motor? Or are you just looking at the stock gauges?? Removing the T_stat can actually cause more problems. The coolant will flow through the block too fast and not remove heat properly. That`s why racers use a restrictor, like a big washer were the stat goes to help slow the water down.
If the suggestions 05GTO doesn`t help, maybe check the water pump to be sure it`s the right unit for the car and that the impeller blade is still attached to the center shaft, I`ve seen them come loose. I`ve also seen wrong impeller blades installed from the reman place so the blades are backwards, which are meant for serp belts that cause the pump to run in the other direction. If the impeller is of the wrong design that will cause overheating problems that will be worse the faster the car goes.
Also if the block is full of crud, that will cause this condition too.
I also could not get my car to stop pinging when I first got it, they had the wrong distributor installed that was swinging the timing in the wrong direction under acceleration, I couldn`t get it to run right to save my *** until I swapped it out with the original one.
Rukee is offline  
post #6 of 6 (permalink) Old 07-12-2008, 08:53 PM Thread Starter
 
Join Date: Jul 2008
Posts: 6
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Thanks guys,

I'll give all of these things a try. Much appreciated.

BB
billie bob is offline  
Sponsored Links
Advertisement
 
Reply

  Pontiac GTO Forum > Clubs, Events & Regional Discussion > Pacific

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Pontiac GTO Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in











Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Similar Threads
Thread Thread Starter Forum Replies Last Post
Tech Support Calls big_mike The Lounge 0 10-20-2005 10:39 AM

Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome