Jump to content
SAU Community

Are all Rb30 heads cracked??? (engines not owners)*

Cheww

By Cheww,
in R Series (R30, R31, R32, R33, R34)

 Share

Recommended Posts

Cheww Contributor

Cheww

Posted
Posted

So the other day i herd (what i thought was) a drastic outrageous statement.....

"That ALL rb30 heads are cracked, EVEN if you cant see it (because the crack isn't all the way through yet)"

and this is regarding the r31s as well as the VLs before you ask. 

old mate says its due to the fact that rb30s have hot exhaust gasses on one side of the water jacket and cold water on the other side and these hot and cold conditions are the reason for cracked heads on unmolested engines with 10,000km. 

i dont know if this is standard knowledge or not, but id kinda like to molest my engine so the idea of a potential crack in the head doesn't arouse me at all. So what do yall suggest i to do to find out if my engine has an "invisible" cracked or not? and how would i repair it if it was? (if what he says is true)

my engines actually running like a dream at the moment but it did have over heating troubles in the past that were fixed pretty quick

niZmO_Man Grand Master

niZmO_Man

Posted
Posted

I suspect the cracked head story is from a VL, because their factory cooling system was not set up correctly, so someone drove their VL with a blown headgasket for thousands of kilometers before the engine gave up.

  • Like 1
Ben C34 Grand Master

Ben C34

Posted
Posted
51 minutes ago, niZmO_Man said:

I suspect the cracked head story is from a VL, because their factory cooling system was not set up correctly, so someone drove their VL with a blown headgasket for thousands of kilometers before the engine gave up.

not setup correctly? what do you mean?

the Radiator is lower than the head, you have to bleed the coolant . Because people werent aware of that and didnt do it doesnt mean there is a fault of the car.

niZmO_Man Grand Master

niZmO_Man

Posted
Posted

Running off old memory but it was related to the radiator being lower than head and car not being bled properly because of that. R31's rad was higher? Like I said, it's been a long time since I've read about this.

r32-25t Grand Master

r32-25t

Posted
Posted
2 hours ago, niZmO_Man said:

Running off old memory but it was related to the radiator being lower than head and car not being bled properly because of that. R31's rad was higher? Like I said, it's been a long time since I've read about this.

Yeah this is what it was

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
 Share
Go to topic listing


  • Similar Content

  • Latest Posts

    • Kinkstaah
      Strange issue RB25DET wont start

      By Kinkstaah · Posted

      I've seen similar actually in my situation. You never know what tables are attempted to be used when the car thinks it's -99C or +200C. The fail state is not usually that extreme but you know what I mean - it was in my case though! This is where being able to read all the sensors is useful cause you see this stuff really quickly.
    • Kinkstaah
      First time Skyline owner

      By Kinkstaah · Posted

      The above is very important. However as long as you keep timing relatively low, it's plausible to make your own knock ears and plausible to learn to tune with a modern ECU that can do wideband O2 correction like a boost controller. I mean if you only have one viable road to even drive the car on, learning to tinker to this level may be worth doing given you can't do much else with the car...?
    • Kinkstaah
      Chris' Toyota Mark ii JZX110

      By Kinkstaah · Posted

      I find the fact that the rear plate has to be bent inwards at the rear not so bad: but the front is just awful: It's like come on. (these are my very old, now retired/turned in plates) TBH it is a lot of money to fix a minor issue, the fact I said "I'll never really spend the money on doing this" is why people ended up buying them as a gift for a 'car guy' who can be hard to shop for.. for car guy things.
    • GTSBoy
      Chris' Toyota Mark ii JZX110

      By GTSBoy · Posted

      I just bent the ends of my premo plates. It even went through Regency like that after the engine conversion and the inspector (a great bloke!) just squinted his eyes and said "I didn't see that". Plates, and how they look, are just something that have zero importance to me.
    • GTSBoy
      Strange issue RB25DET wont start

      By GTSBoy · Posted

      Yeah, I would have said the same. It makes me suggest that there are other things wrong, such that the ECU is totally unhappy with the broken sensor. The only other thought here is that maybe it is shorted, which might cause a different issue to the typical "disconnected" sensor.
×
×
  • Create New...