Jump to content
SAU Community

Recommended Posts

Hi all, looking for some guidance on what to do with my car.

95 r33 gtst, blew built engine recently, put in a second hand motor, drove for 1 day, thermostat stopped working, overheated and blew head gasket likely.

Telltale symptoms are white smoke on idle and water/coolant spitting out from the exhaust for the blown HG. Car also idles upto 80+degrees and the top hose gets hot but the bottom hose stays cold (so stuck thermostat i guess). Radiator is an alloy unit and almost positive not blocked.

Am quite poor nowaways due to family and commitments and just spent a lot dropping the second hand motor in.

Where should i go from here? Either sell it/wreck it or do another f*cking motor and get it back on the road again.

I'm fairly confident with doing my own work but have never opened an engine before (but am keen). I have limited garage space but do have a decent collection of tools etc.

I also still have the dead built motor at the mechanics and the BHG motor is of course still in car and running.

What's my best option in your opinion? Pull head off and replace headgasket on standard motor? Do i need to get the head machined for this seeing as it is probably warped from the overheating and BHG or is the head likely no good to reuse because it's warped?

Head on the built motor isn't warped but may have a dead valve or two from when a piston failed so that's always an option (get it refreshed and reuse maybe).

Tried to keep post as short as possible sorry. And i would REALLY appreciate any and all help. I've drained myself $$ keeping this car and it's one of only few things that keeps me sane/happy and feel ultra passionate about.

I'll have a fair few questions to follow likely once i get some guidance on what to do, all to do with doing the work myself or whether something is suitable i guess (for example is a warped head reusable ).

Many thanks.gif

Link to comment
https://www.sau.com.au/forums/topic/382092-guidance-on-dying-33-please/
Share on other sites

Hi i would remove the head which you will need a 10mm male hex socket

take to machine shop and have it skimmed and checked for cracks buy new

std gasket and put it back together with a new thermostat and make sur that

the cooling system is working before you test drive it and you should be fine.

its your cheapest altenitive...

I learnt the same lesson many years ago in a 62 mini, the thermostat never opened after an engine rebuild and it had no temp gauge. >_<

Now I always test them in hot water first. lol.

Looks like youre ripping the head off Jon.

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


  • Similar Content

  • Latest Posts

    • perhaps i should have mentioned, I plugged the unit in before i handed over to the electronics repair shop to see what damaged had been caused and the unit worked (ac controls, rear demister etc) bar the lights behind the lcd. i would assume that the diode was only to control lighting and didnt harm anything else i got the unit back from the electronics repair shop and all is well (to a point). The lights are back on and ac controls are working. im still paranoid as i beleive the repairer just put in any zener diode he could find and admitted asking chatgpt if its compatible   i do however have another issue... sometimes when i turn the ignition on, the climate control unit now goes through a diagnostics procedure which normally occurs when you disconnect and reconnect but this may be due to the below   to top everything off, and feel free to shoot me as im just about to do it myself anyway, while i was checking the newly repaired board by plugging in the climate control unit bare without the housing, i believe i may have shorted it on the headunit surround. Climate control unit still works but now the keyless entry doesnt work along with the dome light not turning on when you open the door. to add to this tricky situation, when you start the car and remove the key ( i have a turbo timer so car remains on) the keyless entry works. the dome light also works when you switch to the on position. fuses were checked and all ok ive deduced that the short somehow has messed with the smart entry control module as that is what controls the keyless entry and dome light on door opening   you guys wouldnt happen to have any experience with that topic lmao... im only laughing as its all i can do right now my self diagnosed adhd always gets me in a situation as i have no patience and want to get everything done in shortest amount of time as possible often ignoring crucial steps such as disconnecting battery when stuffing around with electronics or even placing a simple rag over the metallic headunit surround when placing a live pcb board on top of it   FML
    • Bit of a pity we don't have good images of the back/front of the PCB ~ that said, I found a YT vid of a teardown to replace dicky clock switches, and got enough of a glimpse to realize this PCB is the front-end to a connected to what I'll call PCBA, and as such this is all digital on this PCB..ergo, battery voltage probably doesn't make an appearance here ; that is, I'd expect them to do something on PCBA wrt power conditioning for the adjustment/display/switch PCB.... ....given what's transpired..ie; some permutation of 12vdc on a 5vdc with or without correct polarity...would explain why the zener said "no" and exploded. The transistor Q5 (M33) is likely to be a digital switching transistor...that is, package has builtin bias resistors to ensure it saturates as soon as base threshold voltage is reached (minimal rise/fall time)....and wrt the question 'what else could've fried?' ....well, I know there's an MCU on this board (display, I/O at a guess), and you hope they isolated it from this scenario...I got my crayons out, it looks a bit like this...   ...not a lot to see, or rather, everything you'd like to see disappears down a via to the other side...base drive for the transistor comes from somewhere else, what this transistor is switching is somewhere else...but the zener circuit is exclusive to all this ~ it's providing a set voltage (current limited by the 1K3 resistor R19)...and disappears somewhere else down the via I marked V out ; if the errant voltage 'jumped' the diode in the millisecond before it exploded, whatever that V out via feeds may have seen a spike... ....I'll just imagine that Q5 was switched off at the time, thus no damage should've been done....but whatever that zener feeds has to be checked... HTH
    • I think Fitmit had some, have a look on there (theyre Australian as well)
    • Hah, fair enough! But if you learn with this one you can drive any other OEM manual. No modern luxury features like auto rev-matching or hillstart assist to give you a false sense of confidence. And a heavy car with not that much torque so it stalls easily. 
×
×
  • Create New...