Possible Cracked Head Qs.
05-10-2004, 04:45 AM
#1
Burning Brakes
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Possible Cracked Head Qs.
Some head intake port questions.....
1. Can a crack in the Intake Port be detected by:
a. Compression Test?
b. Leakdown Test?
c. HydroCarbon Test?
2. Will a crack in the Intake Port cause:
a. Pressurized water system?
b. Smoking?
3. Which of the following could cause the Intake Port to crack?
a. Excessive Porting
b. Metal Fatique (heat/cold cycling)
c. Detonation (overboost)
d. Rust
e. Overheat
f. None of above.
g. All of above.
Tks.
1. Can a crack in the Intake Port be detected by:
a. Compression Test?
b. Leakdown Test?
c. HydroCarbon Test?
2. Will a crack in the Intake Port cause:
a. Pressurized water system?
b. Smoking?
3. Which of the following could cause the Intake Port to crack?
a. Excessive Porting
b. Metal Fatique (heat/cold cycling)
c. Detonation (overboost)
d. Rust
e. Overheat
f. None of above.
g. All of above.
Tks.
05-10-2004, 10:42 AM
#3
Nordschleife Master
Has anyone here ever had a cracked head? On their car I mean? I can't recall hearing of one, I think you're probably barking up the wrong tree.
Do compression and leakdown tests and let us know what your numbers are.
Do compression and leakdown tests and let us know what your numbers are.
05-10-2004, 02:45 PM
#4
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Well... it all depends.
I have seen 2 heads cracked..............well including mine 3.
The other 2 were cracked between holes 1 and 2.....and were very obvious!
Unfortunately with the head on the car its hard to have a 100% diagnosis unless it spewing coolant externally..... hehehehe
Compression and leakdowns can show bad rings/valves/headgaskets etc...etc
A cracked head can definitely pressurize the coolant expansion tank...
I tried pressurizing the coolant tank to see if I could find the crack on the head..... Unfortunately it did not work. My head would only start buring off the coolant once she had been running approximately 3-5 minutes....
I have seen 2 heads cracked..............well including mine 3.
The other 2 were cracked between holes 1 and 2.....and were very obvious!
Unfortunately with the head on the car its hard to have a 100% diagnosis unless it spewing coolant externally..... hehehehe
Compression and leakdowns can show bad rings/valves/headgaskets etc...etc
A cracked head can definitely pressurize the coolant expansion tank...
I tried pressurizing the coolant tank to see if I could find the crack on the head..... Unfortunately it did not work. My head would only start buring off the coolant once she had been running approximately 3-5 minutes....