The 1947 - Present Chevrolet & GMC Truck Message Board Network







Register or Log In To remove these advertisements.

Go Back   The 1947 - Present Chevrolet & GMC Truck Message Board Network > 47 - Current classic GM Trucks > The 1967 - 1972 Chevy/GMC Suburbans & Panels Message Board

Web 67-72chevytrucks.com


Reply
 
Thread Tools Display Modes
Old 11-10-2018, 01:45 PM   #1
AlmostClueless
Registered User
 
Join Date: Oct 2018
Location: St. Louis, MO
Posts: 7
72 Suburban cylinder head question

Hi, everyone,

Just bought a very original, but really, really rough (sat outside untouched since 1988) 72 K10 Suburban & I'm just hoping to work over the next couple of years to get her into a decent beater to use on the farm & for fishing/camping/hunting. So, hoping to spend as little as possible. The engine's stuck. I got one head off so far & hoping to get the other off today if weather holds. Cylinders on the side I removed look really good, no real ring groove, surface rust...just appear to need some penetrating oil, some plumber's cloth maybe, then push the pistons out, hone the bores & go with new rings and bearings. Anyway, my question is with the heads:

They're 487X castings (casting date indicates actually cast in 71) and as long as they're not cracked, they look really good. Valves are all sitting way up high and even all across. Do any of you know whether they have induction hardened exhaust seats? Hoping that I can run them with just a decent valve job & not have to spend the extra cash for a hardened seat install.

Thanks for any information and take care.

Clueless
AlmostClueless is offline   Reply With Quote
Old 11-10-2018, 03:39 PM   #2
HO455
Registered User
 
HO455's Avatar
 
Join Date: Feb 2016
Location: Portland Oregon
Posts: 4,434
Re: 72 Suburban cylinder head question

I don't have a clue about that casting number, but if it was running in the 80's it was on unleaded fuel. So if the seats look good then they are most likely a hardened seat of some kind. If they aren't hardened and look good then you may have a fresh valve job and are good for 30-40k miles at the least. If it was mine and the seats look good I would install some new positive seals on the valves and move forward.
__________________
Thanks to Bob and Jeanie and everyone else at Superior Performance for all their great help.
1967 Burban the WMB,1991 S(stink)-10 Blazer,1969 GTO, 1970 Javelin, 1952 F3 Ford 4X4, 29 Model A, 72 Firebird. 85 Alfa Romeo
If it breaks I didn't want it in the first place
The WMB http://67-72chevytrucks.com/vboard/s...d.php?t=698377
HO455 is offline   Reply With Quote
Old 11-10-2018, 08:05 PM   #3
AlmostClueless
Registered User
 
Join Date: Oct 2018
Location: St. Louis, MO
Posts: 7
Re: 72 Suburban cylinder head question

Howdy, 455,

Good points, all. Thanks for the wisdom. The odometer shows 25,900, which means at least 125,900. It hadn't occurred to me that a good number of those would've been on unleaded gasoline given it was on the road till '88, but it surely makes sense. That makes me feel a ton better about my chances at keeping costs down. Thanks, again. I've only been on this forum for a short time, but I'm already learning a lot. Take care.

A little less clueless, HA!
AlmostClueless is offline   Reply With Quote
Old 11-12-2018, 06:28 PM   #4
HO455
Registered User
 
HO455's Avatar
 
Join Date: Feb 2016
Location: Portland Oregon
Posts: 4,434
Re: 72 Suburban cylinder head question

How about posting some photos? We all love that stuff.
__________________
Thanks to Bob and Jeanie and everyone else at Superior Performance for all their great help.
1967 Burban the WMB,1991 S(stink)-10 Blazer,1969 GTO, 1970 Javelin, 1952 F3 Ford 4X4, 29 Model A, 72 Firebird. 85 Alfa Romeo
If it breaks I didn't want it in the first place
The WMB http://67-72chevytrucks.com/vboard/s...d.php?t=698377
HO455 is offline   Reply With Quote
Reply

Bookmarks

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 12:42 AM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2018, vBulletin Solutions Inc.
Copyright 1997-2013 67-72chevytrucks.com