#1  
Old 01-28-2020, 04:06 PM
1965 Pontiac Parisienne's Avatar
1965 Pontiac Parisienne 1965 Pontiac Parisienne is offline
Chief Ponti-yacker
 
Join Date: Feb 2007
Location: Germany, Cologne
Posts: 727
Default 1965 389 cylinder head new valves

Hi friends

Valve job question. I’m just rebuilding my cylinder heads. The old valves looking okay but I like to replace with correct sealed power intake / exhaust valves.

If I use these new Standart valves like from sealed power what have I to do with the valves ? Only grind them with a special lube paste in two steps in the head ? Or have I let the new valves go to a machine shop ?
Or should I use my old valves again after cleaning ? They re still straight 7oK on them ..how to clean ? With a Messing wire brush ?
Thx for any feedback
Attached Thumbnails
Click image for larger version

Name:	4B95E9E0-245E-4D5D-9153-B850CCD5B9EC.jpg
Views:	82
Size:	44.7 KB
ID:	530259   Click image for larger version

Name:	D859C7CB-1864-4977-9E32-8FE627DDF5F6.jpg
Views:	103
Size:	83.1 KB
ID:	530260   Click image for larger version

Name:	719BDCB2-E13A-43F0-BE29-0C47775EE6C2.jpg
Views:	94
Size:	71.2 KB
ID:	530261  

__________________
1965 Bonneville 2 door coupe nightwatch blue AZ car
1965 Bonneville convertible starlight black
1966 Star Chief Coupé
1965 canandian Parisienne custome sport convertible AZ car. „Sold“
1977 california Firebird Esprit [/SIZE][/FONT]

  #2  
Old 01-28-2020, 11:26 PM
hurryinhoosier62 hurryinhoosier62 is offline
Ultimate Warrior
 
Join Date: May 2006
Location: Floyd Co., IN/SE KY
Posts: 3,930
Default

ANYTIME you replace valves you need to do a complete valve grind. Attempting to use lapping compound as a replacement is NOT a good plan. Reusing OE welded valves with 70K on them (how old?) is a recipe for disaster. Quality stainless steel valves are affordable and are a definite upgrade over the OE type.

__________________
“It takes considerable knowledge just to realize the extent of your own ignorance.”

Dr. Thomas Sowell
  #3  
Old 01-29-2020, 08:55 AM
steve25's Avatar
steve25 steve25 is online now
Ultimate Warrior
 
Join Date: May 2008
Location: Westchester NY
Posts: 14,631
Default

Yes, you need to get a valve job done to insure good sealing, you also while things are apart check the side of each rocker stud ( front and rear lenght wise ) for signs of the slot in the rocker are digging a groove into them due to the push rod guide holes in the head being warn.

Also flip over each rocker adjusting nut and confirm that they have not been over torqued and showing signs of cracking as in my drawing posted here.
Attached Thumbnails
Click image for larger version

Name:	IMG_1123.jpg
Views:	35
Size:	32.3 KB
ID:	530324  

__________________
Wernher Von Braun warned before his retirement from NASA back in 1972, that the next world war would be against the ETs!
And he was not talking about 1/8 or 1/4 mile ETs!

1) 1940s 100% silver 4 cup tea server set.

Two dry rotted 14 x 10 Micky Thompson slicks.

1) un-mailed in gift coupon from a 1972 box of corn flakes.
Two pairs of brown leather flip flops, never seen more then 2 mph.

Education is what your left with once you forget things!

Last edited by steve25; 01-29-2020 at 09:44 AM.
  #4  
Old 01-29-2020, 09:12 AM
1965 Pontiac Parisienne's Avatar
1965 Pontiac Parisienne 1965 Pontiac Parisienne is offline
Chief Ponti-yacker
 
Join Date: Feb 2007
Location: Germany, Cologne
Posts: 727
Default New valves

Thx for feedback.. so it’s better to go with the old valves .. cleaning, and grinding with the lubing paste in two steps .. all valves are still looking good after 70K miles and 55 years ..

How is the best way to clean the dirty valves ?
A brass brush ?
Attached Thumbnails
Click image for larger version

Name:	7D2FD4AC-91F7-458A-9F97-A569590EF7CA.jpg
Views:	40
Size:	64.5 KB
ID:	530325   Click image for larger version

Name:	52E9A659-F51D-4FF7-9AC4-B82C8E87461C.jpg
Views:	44
Size:	45.3 KB
ID:	530326   Click image for larger version

Name:	390A754C-E06E-48EF-98F8-A124BA01279F.jpg
Views:	41
Size:	45.5 KB
ID:	530327  

__________________
1965 Bonneville 2 door coupe nightwatch blue AZ car
1965 Bonneville convertible starlight black
1966 Star Chief Coupé
1965 canandian Parisienne custome sport convertible AZ car. „Sold“
1977 california Firebird Esprit [/SIZE][/FONT]

  #5  
Old 01-29-2020, 09:42 AM
propuckstopper propuckstopper is offline
Senior Member
 
Join Date: Jul 2012
Location: Canada
Posts: 241
Default

Quote:
Originally Posted by 1965 Pontiac Parisienne View Post
Thx for feedback.. so it’s better to go with the old valves .. cleaning, and grinding with the lubing paste in two steps .. all valves are still looking good after 70K miles and 55 years ..

How is the best way to clean the dirty valves ?
A brass brush ?
From hurryinhoosier62 a couple of posts ago:

Reusing OE welded valves with 70K on them (how old?) is a recipe for disaster. Quality stainless steel valves are affordable and are a definite upgrade over the OE type.

  #6  
Old 01-29-2020, 10:36 AM
ANDYA ANDYA is offline
Chief Ponti-yacker
 
Join Date: Nov 2005
Location: BROOKLYN, NY
Posts: 904
Default

The heads are already off the engine and apart, that's half the battle. I would send them to a good machine shop and have a valve job done with new valves . Maybe convert to screw in studs . Years ago a friend of mine tried to do what you are planning to a set of 670 heads. He cleaned the old valves with a wire wheel and lapped them in with compound. The results were anything but great after he put them back on his 428. Eventually he sent a spare set of 670 heads to Nunzi. The heads came back looking brand new with high flow stainless valves. He swore the 428 picked up a noticeable increase in HP and the engine ran great for another 30k miles until he sold the car. Some things are not worth doing yourself, leave it to the pros with the right equipment.

  #7  
Old 01-29-2020, 11:40 AM
hurryinhoosier62 hurryinhoosier62 is offline
Ultimate Warrior
 
Join Date: May 2006
Location: Floyd Co., IN/SE KY
Posts: 3,930
Default

Quote:
Originally Posted by 1965 Pontiac Parisienne View Post
Thx for feedback.. so it’s better to go with the old valves .. cleaning, and grinding with the lubing paste in two steps .. all valves are still looking good after 70K miles and 55 years ..

How is the best way to clean the dirty valves ?
A brass brush ?
55 years old? DO NOT reuse those valves unless you have a very deep bank account! Old OE valves are known for suffering head separations. The corrosive effects of the combustion process eat into the welds on the microscopic level where it can not be detected. The heads are off; it’s a perfect time to have them cleaned, valve guide clearances checked, the decks trued, valve springs checked and/or replaced and the entire valve train upgraded(as was earlier mentioned).

__________________
“It takes considerable knowledge just to realize the extent of your own ignorance.”

Dr. Thomas Sowell
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not 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

Forum Jump


All times are GMT -4. The time now is 09:44 AM.

 

About Us

The PY Online Forums is the largest online gathering of Pontiac enthusiasts anywhere in the world. Founded in 1991, it was also the first online forum for people to gather and talk about their Pontiacs. Since then, it has become the mecca of Pontiac technical data and knowledge that no other place can surpass.

 




Copyright © 2017