were the head bolts to tight? bad casting? It looks like it started at the bolt hole and spread to the bridges between the adjacent cooling pasages. Have others had similar problems?
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why would this block crack?
- Thread starter tig321
- Start date
I would have to guess that the coolant in the block froze solid and cracked the block at some point.
I have not seen that before..
I have not seen that before..
Imo. there could be 2 things caused.
1. The block heating up, (overheating) and the block Disipating the heat to Fast.. Looks like a crack due to heating to me
2. There was Shit in the hole when he tightened down the headbolt which caused it to crack
1. The block heating up, (overheating) and the block Disipating the heat to Fast.. Looks like a crack due to heating to me
2. There was Shit in the hole when he tightened down the headbolt which caused it to crack
that all sounds very possible. The Head bolts were very tight though. I had to use a lenght of pipe for leverage. I have only ever removed 3 other 7m heads and this is first time I was worried about rounding the allen heads on the bolts. there was no block heater however and I 've heard It gets very cold in some parts of japan
^
Eh....
Listen Carefully man
Not Speaking ANything of a block heater.
heat outside has an effect true BUT if the radiator was Clogged thermostat not working, Shit wrong with the cooling system, a Engine Can get Very hott. i dont care if its 30 degree's outside u can still have overheating problems.... if the motor got really hot, and it was Decently cold outside the heat Disipates faster due to cold weather outside which Will Cause a block to get cracked
thats pretty much it summed up ^
Eh....
Listen Carefully man
Not Speaking ANything of a block heater.
heat outside has an effect true BUT if the radiator was Clogged thermostat not working, Shit wrong with the cooling system, a Engine Can get Very hott. i dont care if its 30 degree's outside u can still have overheating problems.... if the motor got really hot, and it was Decently cold outside the heat Disipates faster due to cold weather outside which Will Cause a block to get cracked
thats pretty much it summed up ^
Sorry Superjustin13 a little misunderstanding. In my confusing post.I was refering to Joel W's post.
What I was suggesting was that since there was no block heater the car may have been left outside unplugged and the coolant froze expanding and causing the cracks. I should have been clearer. I forgot not everyone has a block heater.
Joel W. said:I would have to guess that the coolant in the block froze solid and cracked the block at some point.
I have not seen that before..
What I was suggesting was that since there was no block heater the car may have been left outside unplugged and the coolant froze expanding and causing the cracks. I should have been clearer. I forgot not everyone has a block heater.
^
Do you know at what Temperature coolant freeze's at Fella's?
lol
It Could Freeze if there was to much water in the coolant.
But Who the hell dosnt know how to mix coolant?
if you dont Look know the freezing temperature LOOK below !!
−40°F (−40°C)
Thats cold if u ask me... i dont think JDM tightness gets That cold
Do you know at what Temperature coolant freeze's at Fella's?
lol
It Could Freeze if there was to much water in the coolant.
But Who the hell dosnt know how to mix coolant?
if you dont Look know the freezing temperature LOOK below !!
−40°F (−40°C)
Thats cold if u ask me... i dont think JDM tightness gets That cold
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Suprajustin13: You are assuming it had good coolant, I am assuming it did not. You do not need to be agressive about it. Yes, I know what temp water freezes at also.
If you seriously think that the crack is caused from overheating or from debri in the bolt hole then we differ in opinions here.. Please relax...
When I said I have not seen this before, I was referring to the 7m in particular.
If you seriously think that the crack is caused from overheating or from debri in the bolt hole then we differ in opinions here.. Please relax...
When I said I have not seen this before, I was referring to the 7m in particular.
I think its from the coolant freezing. Iv personaly seen frozen water shatter a solid steel pipe just from the expanding.
I know if a car is hot and low on water and you put cold water in it, it can crack the head. Maybe the same thing happened to your block?
Wouldn't the freeze plugs keep something like that from happening?
Wouldn't the freeze plugs keep something like that from happening?
Im with superjustin13 looks to me like that thing got really hot because the freeze plug would have blown before it did anything like that.
I have seen many blocks freeze and crack before it pops a freeze plug out. It all depends on temp, wind chill and wind direction as to what will freeze first.
With the hundreds of 7m's here with over heating problems, I would have thought this would be common to others if it was really from over heating.. :dunno:
With the hundreds of 7m's here with over heating problems, I would have thought this would be common to others if it was really from over heating.. :dunno:
looks to me like a headgasket repair.. possibly torqued way too tight with crud in the threads, and then overheated.
Well I saw such case on a 2jz-ge on a chaser there was a coolant leak and it leaked all the coolant and the temp was full and the engine grow red and the owner was a woman she pooped the hood and saw the engine turning red so she "solved the problem by thrwoing water on the engine itself as to "cool" it and everything in the engine was messed up..was gonna rebuild that engine but the block was cracked just like yours is and kinda more but yeah..heh
I'm not sure but would the head not be very warped if the engine was so over heated? I checked it and it seems straight around.004in. I have a head from another engine that I know was overheated and it's bent about 020in accross its length.
I did a quick google search and found that the inland basin areas in Japan commonly see temps of -30C(-22F) the coldest ever recorded is -42C.
Superjustin13 There are many people without a perfect coolant mix
especially when the coolant system (ie. overflow) is not working properly, since most people top the rad with water.
Thanks for your opinions. I gotto go look at some engines now.
I did a quick google search and found that the inland basin areas in Japan commonly see temps of -30C(-22F) the coldest ever recorded is -42C.
Superjustin13 There are many people without a perfect coolant mix
especially when the coolant system (ie. overflow) is not working properly, since most people top the rad with water.
Thanks for your opinions. I gotto go look at some engines now.
amd_hcds said:
I'd love to see that. Throwing water on something cast when red hot sounds very baad.
hottscennessey said:
Isnt that like Exactly what i said?
Shiiitt.
I need to be a super mod. wtf?
Joel W. said:That is a good clue, yes and it supports my theory,
Eh, I guess you got me there with the Coolant in my own words about people filling it with water and filling it more then 70/30 if its below that it Will freeze.
So im getting promoted to mod right?
Cuz im sutch a Effin help to the community/
WOOOOTT
Im gonna go watch some porn now
peacing out.