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 1973 - 1987 Chevrolet & GMC Squarebody Pickups Message Board

Web 67-72chevytrucks.com


Reply
 
Thread Tools Display Modes
Old 05-09-2010, 12:32 PM   #1
moneyeater
Registered User
 
moneyeater's Avatar
 
Join Date: Feb 2003
Location: Northern Germany,near Bremen
Posts: 684
Unhappy leaks,leaks,leaks........

Hello all,
yesterday i took a little spin and cruised around about 20 miles!
Before i started i checked oil and water and all was ok.I noticed a little water in the first valley on the in take behind the heaterport and thought it dropped of the hood because it was wet on the inside. Cleaned that and started the cruise.
after that 20 mile i did a WOT start and at the next trafficlight the idle was very low and the motor allmost died and sounded odd!
I checked for some visible problems but could´t find anything!
The headergaskets were blowing by on both sides where only the passenger one next to the firewall did before and it sounds like the collectorgaskets also blow by! The idling was still very low so i turned idlesetscrew on the carb up a little.
Today i checked and retorqued the headerbolts but they weren´t loose.
While doing that i noticed the passengerside valvecover leaking oil and the water on the intake was there too. Below the carblinkage is oil on the intake
and the radiator misses some water.
The frontlip of the suspensioncrossmember is carrying an oilfilm and the starter is too!
Is it time to pull the engine and replace all the gaskets?
Are there some headergaskets that work better?
I have rubbergaskets for the valvecovers, should i go back to cork?
Where does the water and oil on the intake come from?
Does the engine press it out the thraeds of the screws?
How difficult is it to replace the rear crankshaft seal?

Lot of questions and i hope i can get some helpfull hints and tricks to solve all that leakage!
Volker
__________________
My little US vehicle parts business:
http://www.thegearheaddepot.com/
Come have a look!

´81 GMC C 10, Spanish Red
moneyeater is offline   Reply With Quote
Old 05-09-2010, 07:50 PM   #2
bitchin85
Registered User
 
bitchin85's Avatar
 
Join Date: Aug 2009
Location: Lambertville MI
Posts: 962
Re: leaks,leaks,leaks........

if theres oil around the bolts on your intake, take them out and put teflon or loc-tite or something on the threasd and out them back in one at a time. they will leak oil if theyre not sealed
__________________
"I'll keep my guns, money, and freedom. You can keep the "change"
bitchin85 is offline   Reply With Quote
Old 05-11-2010, 11:38 AM   #3
xs-style
Registered User
 
xs-style's Avatar
 
Join Date: Mar 2008
Location: Lawndale, NC
Posts: 658
Re: leaks,leaks,leaks........

Not much help to ya here, just another member with a similar issue. I thought I had my engine all buttoned up last week. Come to find out I have an intake gasket leaking. Oh well, time to pull and replace. Good thing for people in our situation is gaskets normally arent that expensive. Its just time consuming to do the work.
__________________
1978 Scottsdale - celebrating 10 years of teaching me profanity
1990 Silverado - bought in Nov. 2016 and it's already catching up - Sold
1987 k5 blazer - sold... :\ seed money for the 81
1981 k20 4x4 - 5.3 swap in progress

Events attended:
Spring GOG 2011
Dale JR car show Summer 2012
Gathering at Tommys pickup parts
xs-style is offline   Reply With Quote
Old 05-11-2010, 02:25 PM   #4
us111
Registered User
 
Join Date: Jul 2004
Location: ashland oh
Posts: 660
Re: leaks,leaks,leaks........

hello.you definitely wanna be sure head bolts and intake bolts have a sealer of some sort on them.as for the cross member being wet your probably
gonna want to dry everything up and have a look at bottom side of water pump.thats usually where water lays from a bad water pump.couple places to start looking..
us111 is offline   Reply With Quote
Old 05-11-2010, 09:54 PM   #5
STOCKISH
Formerly- 1972SuperCheyenne
 
STOCKISH's Avatar
 
Join Date: Oct 2008
Location: Wake Forest NC
Posts: 5,782
Re: leaks,leaks,leaks........

Believe it or not, I always use stock exhaust manifold gaskets at the head when using headers. They never leak for me, work perfect, and are cheap. Also, they are the same size as the ports on the heads so you dont restrict anything either.
__________________
--Josh

My Build Thread:http://67-72chevytrucks.com/vboard/s...d.php?t=799218

A good crossthread is better than Loctite any day.

Life is not about what you have, but who you have to share it with.
STOCKISH is offline   Reply With Quote
Old 05-12-2010, 03:20 AM   #6
moneyeater
Registered User
 
moneyeater's Avatar
 
Join Date: Feb 2003
Location: Northern Germany,near Bremen
Posts: 684
Re: leaks,leaks,leaks........

I found out that the oil on the crossmember is from the oilpan and timingcover gaskets.
The intakebolts are not sealed and the water on the intake seems to drip from the heaterhose.
I think i´ll have to pull the engine and do a complete change on all gaskets!
Or should i leave the motor in the truck and bust my knuckles?
If i can get some nice Ramhorns i rebuild the whole exhaust and that would take care of the headergasketheadache!
Volker
__________________
My little US vehicle parts business:
http://www.thegearheaddepot.com/
Come have a look!

´81 GMC C 10, Spanish Red
moneyeater is offline   Reply With Quote
Reply

Bookmarks

Tags
coolant, leak, oil


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 09:32 AM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
Copyright 1997-2022 67-72chevytrucks.com