The 1947 - Present Chevrolet & GMC Truck Message Board Network

The 1947 - Present Chevrolet & GMC Truck Message Board Network (https://67-72chevytrucks.com/vboard/index.php)
-   The 1973 - 1987 Chevrolet & GMC Squarebody Pickups Message Board (https://67-72chevytrucks.com/vboard/forumdisplay.php?f=4)
-   -   Restoring Rusty (https://67-72chevytrucks.com/vboard/showthread.php?t=645440)

Gregski 10-21-2016 10:12 PM

Re: Restoring Rusty
 
1 Attachment(s)
time to go to our Thinking Chair

(some of you with no kids may not get this)

Gregski 10-21-2016 10:18 PM

Re: Restoring Rusty - Cylinder Head Pressure Test
 
1 Attachment(s)
so went and visited Nichols and Sons Machine Shop in Sacramento and the only person nicer than the guy I talked to was his dan Glenn and the only nicer person than him was his dad, Mr. Nichols I presume, these guys are wonderful

so got some quotes

$20 bucks to magnaflux cylinder heads (brought in assembled minus the rockers)

$80 bucks to pressure test them (this does not include the magnaflux and if they decide to pressure test them they do not magnaflux them)

I assume that's per set, and not per head

but that got me to a thinking, what will the Greg a learn if he just drops off the heads and the Nichols tell him they is cracked or leaking... nothing

but if he do it himself, he will be that much smarter

so far our materials are:

$10 bucks for the steel plate

$10 bucks for three pieces of 1/4 inch thick 3 inches wide by 20 inches long black rubber in the pic on the far left (safety first) ha ha

Gregski 10-21-2016 10:23 PM

Re: Restoring Rusty
 
5 Attachment(s)
alright so first we gotta make some metal shavings

Gregski 10-21-2016 10:30 PM

Re: Restoring Rusty
 
4 Attachment(s)
man that plate looks nice, I would totally tap that

Gregski 10-21-2016 10:32 PM

Re: Restoring Rusty
 
3 Attachment(s)
so let's try it on for size

Gregski 10-21-2016 10:36 PM

Re: Restoring Rusty
 
4 Attachment(s)
now lets add some rubber to this metal sandwich, I give you the Greg-Pro custom gasket

we start off by making rubber and wood shavings this time

Gregski 10-21-2016 10:38 PM

Re: Restoring Rusty
 
2 Attachment(s)
and here is one metal plate and rubber gasket done, that's as far as I got tonight, tomorrow I hope to make the opposite plate and block off the water cross over ports on the intake manifold side

the plan is to put some fitting in the water temp sending unit hole and pump it up with air through that, stay tuned

Gregski 10-23-2016 02:44 PM

Re: Restoring Rusty
 
5 Attachment(s)
and so we pressed on and worked on the intake manifold side block off plates

still don't know how to transfer holes to plates so I just use cardboard, I'm sure there is some pokey thing you screw in the threads and tap with a hammer to leave an indentation I imagine, maybe some fabricators/machinists can advise

Gregski 10-23-2016 02:47 PM

Re: Restoring Rusty
 
3 Attachment(s)
I made the rubber pieces next for the intake block off plates

Gregski 10-23-2016 02:52 PM

Re: Restoring Rusty
 
5 Attachment(s)
and so I made the matching other side, I labeled them L and R just in case there was the highly unlikely chance that my custom CNC machine was a gnats hair off and they end up side spcific - hee hee

Gregski 10-23-2016 02:54 PM

Re: Restoring Rusty
 
1 Attachment(s)
then it was time to rip one of them long pieces for the other long 20" bracket

needless to say that consumed an entire 4" cut off wheel

77shorty 10-23-2016 05:48 PM

Re: Restoring Rusty
 
Gregski....digging your progress and long hours......in one of you photos I spotted your (what appears to be) OEM AM/FM radidio and said to myself....."self, ya won't know 'til you ask". Here it is, wood you wanna sell it? I'd love to have it for my 77 shorty.....thanks and keep up the great work. Its a fun read.
Mark, Portland, OR

77shorty 10-23-2016 05:49 PM

Re: Restoring Rusty
 
oops.....almost duplicated...had to edit.

Gregski 10-23-2016 09:35 PM

Re: Restoring Rusty
 
4 Attachment(s)
finished up the pressure tester plates today

Gregski 10-23-2016 09:37 PM

Re: Restoring Rusty
 
2 Attachment(s)
and that's the bottom plate or the skinny plate or the outside of the head plate what ever we want to call it

Gregski 10-23-2016 09:39 PM

Re: Restoring Rusty
 
3 Attachment(s)
so that leaves us with the pesky little side holes

Gregski 10-23-2016 09:41 PM

Re: Restoring Rusty
 
5 Attachment(s)
we need narrow metal strips to weld in here to keep these at bay

we even bevel the edges to give the weld bead a valley or a groove to fill

Gregski 10-23-2016 09:43 PM

Re: Restoring Rusty
 
1 Attachment(s)
I'm sure you've all heard of gassless welding called Flux Core, well this ain't it, this is when the Knucklehead forgot to turn on the gas on his beloved MIG machine, ha ha

Marshy 10-23-2016 09:45 PM

Re: Restoring Rusty
 
Just throwing this out there but, could the 1.5 quarts you added be because some air worked it's way through the system and finally made it to the radiator? Then the 1/2 quart you added was just from the difference between a hot engine vs cold?


When you remove the heads this most recent time did you see any cylinder that was clean from ingesting water/coolant?

Did the engine over heat at all in those 200 miles? What was the operating temp?

I'm starting to wonder if you just like torturing yourself.

Gregski 10-23-2016 09:45 PM

Re: Restoring Rusty
 
3 Attachment(s)
we had the gas on for the other side, nothing to write home about but these beads are much better, hey The Greg is learning ok - it takes practice you know

Gregski 10-23-2016 09:47 PM

Re: Restoring Rusty
 
2 Attachment(s)
you know what they say: "Never time to do it right, but always time to do it over!"

Gregski 10-23-2016 09:52 PM

Re: Restoring Rusty
 
3 Attachment(s)
ok plates all done

Marshy 10-23-2016 09:57 PM

Re: Restoring Rusty
 
Quote:

Originally Posted by Gregski (Post 7750360)
you know what they say: "Never time to do it right, but always time to do it over!"

You should add that to your signature lol.

Gregski 10-23-2016 09:57 PM

Re: Restoring Rusty
 
1 Attachment(s)
Quote:

Originally Posted by Marshy (Post 7750358)
Just throwing this out there but, could the 1.5 quarts you added be because some air worked it's way through the system and finally made it to the radiator? Then the 1/2 quart you added was just from the difference between a hot engine vs cold?

Prior to taking the heads of this time to do the rings I have been adding water to the radiator on a regular basis, like top it off then dive 90 miles to go camping, then top it off to drive home a few days later after the truck has been sitting in a forest for example.

Quote:

Originally Posted by Marshy (Post 7750358)
When you remove the heads this most recent time did you see any cylinder that was clean from ingesting water/coolant?

Cylinders #3 and #5 looked cleaner than the others, but I dismissed it as something to do with the bad/broken oil rings - see pics below

Quote:

Originally Posted by Marshy (Post 7750358)
Did the engine over heat at all in those 200 miles? What was the operating temp?

No, runs at a steady 190 F

Quote:

Originally Posted by Marshy (Post 7750358)
I'm starting to wonder if you just like torturing yourself.

Ha ha, stop. I am troubleshooting / fixing an old 42 year old truck, this comes with the territory

Gregski 10-23-2016 10:02 PM

Re: Restoring Rusty
 
3 Attachment(s)
got lucky with a pipe threaded adapter and a 3/8th barb 90 fitting, this will serve as the air inlet

Marshy 10-23-2016 10:05 PM

Re: Restoring Rusty
 
What pressure do you plan to pump them up to?
What do you plan to put under the plate to seal the head deck?

Gregski 10-23-2016 10:05 PM

Re: Restoring Rusty
 
5 Attachment(s)
I don't own an air compressor so a bicycle pump was the next best thing

pumped it up to 40 PSI

Gregski 10-23-2016 10:08 PM

Re: Restoring Rusty
 
Quote:

Originally Posted by Marshy (Post 7750386)
What pressure do you plan to pump them up to?
What do you plan to put under the plate to seal the head deck?

black 1/4 inch thick rubber, see pics above

radiator caps are rated around 15 PSI so at least that maybe more, what ever my system will hold without blowing the hose off, ha ha

Marshy 10-23-2016 10:10 PM

Re: Restoring Rusty
 
Mix a small bottle of soapy water use it on all connections and leak paths. Check the whole thing so that way if its leaking through a seal you can explain why the gauge going down.

Gregski 10-23-2016 10:11 PM

Re: Restoring Rusty
 
3 Attachment(s)
then it was time to submerge the head in some water

I may do a hot water test as well by dumping in some boiling hot water, but if the heads leak in cold water then there will be no need to go to that extreme

Gregski 10-23-2016 10:14 PM

Re: Restoring Rusty
 
3 Attachment(s)
so how is it? does it work?

Yes the system works great?

here you can see bubbles coming only from the inlet coupling, I did not put any white tape on the threads and need to tighten it some more, but it's a great example of what the leaks would look like

posted a video here: Small Block Chevy Cylinder Test DYI Poor Mans Water Pressure Test

harley87ta 10-24-2016 09:14 PM

Re: Restoring Rusty
 
Did you ever figure out the coolant in this pic? Looks almost like a crack but I'm just speculating.

http://67-72chevytrucks.com/vboard/a...1&d=1475354097

Gregski 10-29-2016 10:35 AM

Re: Restoring Rusty
 
2 Attachment(s)
Quote:

Originally Posted by harley87ta (Post 7734494)
I'm liking your festive gauge package is it Christmas in October?

ha ha, not for long I got tired of the red gauge display making me think I am in the red sort of speak so I yanked it and sent it back to Summit for an exchange, I did buy a green one originally after all so I expect an exchange for a green one - is that too much to ask? ha ha

Gregski 10-29-2016 10:40 AM

Re: Restoring Rusty
 
2 Attachment(s)
Good morning everyone, just wanted to report that after 500 miles on the new rings and con rod bearings we are still shrapnel free, hee hee

also remember after 200 miles on the new rings I drained the break in oil to replace the rod bearings cause of a slight rattlin noise

so far no noises...

hatzie 10-29-2016 03:19 PM

Re: Restoring Rusty
 
Quote:

Originally Posted by Gregski (Post 7755296)
Good morning everyone, just wanted to report that after 500 miles on the new rings and con rod bearings we are still shrapnel free, hee hee

also remember after 200 miles on the new rings I drained the break in oil to replace the rod bearings cause of a slight rattlin noise

so far no noises...

So far so good. Maybe you got away with it.

Looks like a late 1976-78 speedometer.

Gregski 10-29-2016 06:11 PM

Re: Restoring Rusty
 
Quote:

Originally Posted by hatzie (Post 7755433)
So far so good. Maybe you got away with it.

Looks like a late 1976-78 speedometer.

The Man knows his clocks, ha ha!

Gregski 10-29-2016 06:16 PM

Re: Restoring Rusty
 
5 Attachment(s)
so yanked the radiator to isolate it and pressure test it off the truck, I knew I had a pin hole leak by the inlet but I was wondering if there are other leaks as well, nope

picked up these 1 1/2" expansion plugs at NAPA they seem to do the job well

looks like the radiator cap lets go at 10 PSI, oh well that's good enuff I think

Gregski 10-29-2016 06:20 PM

Re: Restoring Rusty
 
3 Attachment(s)
using some high tech equipment here folks, let me tell you that

rocket science this is not, don't be skierd, the overflow nipple worked well to hook up the bicycle pump and fill it with air

Gregski 10-29-2016 06:23 PM

Re: Restoring Rusty
 
2 Attachment(s)
well with no glaring problems with the radiator we moved those expansion plugs over to the inlet and outlet rubber radiator hoses leading to and from the engine and plugged them up

Gregski 10-29-2016 06:27 PM

Re: Restoring Rusty
 
2 Attachment(s)
just like we did with our test cylinder head, we are going in through the water temp sending unit hole to put air in the engine

we were gentle as to not blow up the water pump seals, so just to 10 PSI

I removed the valve covers so that I could see some bubbles if any or hear some hissing, but no, none of that

I also removed the spark plugs to see if I can hear anything in there, nothing, by the way all plugs look the same, so #5 is purdie now

I left the engine pressurised at 10 PSI while I write this up, we'll see if it drops or stays level


All times are GMT -4. The time now is 07:05 PM.

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