How to Fluid test a Cylinder head - Miata Turbo Forum - Boost cars, acquire cats.

Welcome to Miataturbo.net   Members
 


Engine Performance This section is for discussion on all engine building related questions.
Sponsored by:
Sponsored by:

Reply
 
 
 
LinkBack Thread Tools Search this Thread
Old 05-01-2012, 01:08 PM   #1
Senior Member
Thread Starter
iTrader: (1)
 
BogusSVO's Avatar
 
Join Date: Mar 2012
Location: Pensacola Fla.
Posts: 590
Total Cats: 191
Cool How to Fluid test a Cylinder head

How to fluid test a 4G63 Head


This is a simple and quick way to check for seat and valve seal.

First clean the head by the method of your choosing.

Once the head is cleaned, blow the runners out with compressed air to remove any carbon, oil or crud that can give a “false” seal.


Next lay the head with the runners up, and the valves facing you. I am starting on the intake side.

Now get a jug of fluid, I am using water.


Now here is the hard part….. Pour the fluid in the runners, one at a time.

Now that all four runners are filled with fluid.

Now look at the valves in the combustion chamber, no fluid. All is dry. This side is good and the intakes are sealed well.

Now flip the head over, and fill the exhaust runners.

Take note that you will have to plug the EGR passage so the fluid will stay in the runner.

Look at the fluid pour out past the valve, there is an issue that needs to be looked into. It is a bent valve.

Notice how the runner on the left of the divider still holds fluid, but the one on the right is empty. This is cylinder #4. If the left side will not hold fluid, check to make sure you have blocked off the EGR passage.

If you used water, blow the excessive water out with compressed air.

Then with WD-40

Spray WD-40 in the runners to inhibit rust formation on the valve stems.


Now at this point any valve sealing issues can be addressed and fixed.
Attached Thumbnails
How to Fluid test a Cylinder head-036.jpg   How to Fluid test a Cylinder head-024.jpg   How to Fluid test a Cylinder head-025.jpg   How to Fluid test a Cylinder head-026.jpg   How to Fluid test a Cylinder head-027.jpg  

How to Fluid test a Cylinder head-028.jpg   How to Fluid test a Cylinder head-029.jpg   How to Fluid test a Cylinder head-030.jpg   How to Fluid test a Cylinder head-031.jpg   How to Fluid test a Cylinder head-032.jpg  

How to Fluid test a Cylinder head-034.jpg   How to Fluid test a Cylinder head-035.jpg  
BogusSVO is offline   Reply With Quote
Old 05-01-2012, 04:16 PM   #2
Baz
Junior Member
 
Join Date: Jun 2009
Posts: 126
Total Cats: 4
Default

Thanks, simple but very effective, this is something I may try with my built head before fitting to the block......
Baz is offline   Reply With Quote
Old 05-02-2012, 03:42 PM   #3
Destroyer of Inconel
iTrader: (37)
 
EO2K's Avatar
 
Join Date: Apr 2010
Location: In ur driveway, abusin' ur WPA
Posts: 9,642
Total Cats: 954
Default

Nice! I'll probably try this with the VVT head that's on my workbench.

Correct me if I'm wrong, but on all the BP series 1.8 Miata heads, the EGR is external to the head (intake and exhaust manifolds) correct?
EO2K is offline   Reply With Quote
Old 05-02-2012, 07:55 PM   #4
I haz no trubo
iTrader: (2)
 
Oscar's Avatar
 
Join Date: Jan 2007
Location: Bolton, UK
Posts: 3,021
Total Cats: 114
Default

Quote:
Originally Posted by EO2K View Post
Nice! I'll probably try this with the VVT head that's on my workbench.

Correct me if I'm wrong, but on all the BP series 1.8 Miata heads, the EGR is external to the head (intake and exhaust manifolds) correct?
Correct.
Oscar is offline   Reply With Quote
Old 05-03-2012, 03:04 PM   #5
Junior Member
 
Join Date: Dec 2010
Location: DFW TX
Posts: 97
Total Cats: 2
Default

The top of your can of wd-40 could use some... wd-40
LukeH is offline   Reply With Quote
Old 05-03-2012, 11:29 PM   #6
Senior Member
iTrader: (4)
 
2manyhobyz's Avatar
 
Join Date: Feb 2011
Location: Joliet, IL
Posts: 622
Total Cats: 16
Default

Hi Dale,
These are great. Do you have anything in the works for CC ing the head? How about building your own flow bench? Thanks
2manyhobyz is offline   Reply With Quote
Old 05-04-2012, 11:07 AM   #7
Senior Member
Thread Starter
iTrader: (1)
 
BogusSVO's Avatar
 
Join Date: Mar 2012
Location: Pensacola Fla.
Posts: 590
Total Cats: 191
Default

2manyhobz...

Here you go.. How to CC a head

https://www.miataturbo.net/engine-performance-56/how-cc-combustion-chamber-64407/

As far as a "build a flow beanch" thread, I doubt I will be the one to do that.

I am a bit spoiled with my Superflow 600
Attached Thumbnails
How to Fluid test a Cylinder head-dscf4960.jpg  
BogusSVO is offline   Reply With Quote
Old 05-05-2012, 08:50 AM   #8
Junior Member
 
Join Date: Jun 2011
Location: Houston
Posts: 409
Total Cats: 17
Default

Using WD-40 for its original intended purpose! Water Displacement
Handy Man is offline   Reply With Quote
Old 05-05-2012, 09:10 AM   #9
AFM Crusader
iTrader: (18)
 
olderguy's Avatar
 
Join Date: Oct 2004
Location: Wayne, NJ
Posts: 4,438
Total Cats: 84
Default

Maybe someone can do this on a '99 head and a '94 head so that we may calculate the compression ration of a '99 head on a '94 bottom end.
olderguy is offline   Reply With Quote
Old 06-20-2012, 11:51 AM   #10
Senior Member
iTrader: (12)
 
absRTP's Avatar
 
Join Date: Sep 2009
Location: Montreal, Canada
Posts: 582
Total Cats: 0
Default

Thanks again, those write up are just awesome!!
absRTP is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
Project Gemini - Turbo Civic on the Cheap Full_Tilt_Boogie Build Threads 58 12-13-2017 10:04 PM
Leaky Wilwoods mx592 Suspension, Brakes, Drivetrain 1 10-01-2015 01:45 AM
Bad head gasket or ? shooterschmidty Engine Performance 8 09-30-2015 11:28 PM
wiring wideband ground to battery terminal btabor ECUs and Tuning 10 09-28-2015 06:33 PM


Thread Tools Search this Thread
Search this Thread:

Advanced Search

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
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



All times are GMT -4. The time now is 04:17 PM.