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Diagnose The Engine Failure...

JustinP

By JustinP,
in Engines & Forced Induction

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JustinP Mentor

JustinP

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My engine died last night in my R34 GT-T. Basically I was driving along and suddenly I noticed it was not running on all cylinders, it was running REALLY rough. Anyway I thought (hoped) a coilpack or something had died and that I could just baby it home, but then after a couple of minutes the temp started to go up (a little - was watching on the PFC screen).

I could not pull over so I continued to baby it, but then it just started to skyrocket. I pulled straight over in a dangerous location and turned the car off. It was a really bad place to stop (basically a freeway off ramp) so i started it again as I only had to get it about another 100m's to park safetly.

It started OK and I drove it and shut off the engine as soon as I could. When I stopped the PFC read 115 degree's for water temp. I noticed a trail of water behind the car also, not sure if this was just radiator overflow or something more serious.

I left it for about an 45 minutes when help arrived. They brought water so I topped up the radiator (it had lost water, but it took less than 1 litre), then went to try and start it it, and instantly it made a horrible "siezing" kind of noise and would not turn over.

I have not inspected it further, but I am thinking it could be one of the following:

1) Blown head gasket, and maybe one of the cylinders have filled with water hence why it will now not even turn over.

2) Something wrong in the bottom end

3) Both...

Any idea's / thoughts???

Stupid cars!! Sometimes I wish I just had a normal econo shitbox like everyone else.

Edited by JustinP
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JustinP Mentor

JustinP

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take the spark plugs out and see if the bore/s are full of coolant.

Yep, thats my first step, I will get started on the weekend :cool:

I wonder what may have caused though. It had been running a bit hot over the past few months (not too servere though), I knew the radiator was in bad shape. Ironically a new triple core alloy radiator had arrived for it on the same day it died.

The other thing was I was only running premium 95 RON fuel in it (Perth had some servere storms and every BP I went to was either shutdown or only had limited fuel available), but I was not thrashing it too much it because of the crappy fuel, and I was watching for knock and it was not too bad either.

STATUS Grand Master

STATUS

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bugger, one of the first rules is never to put cool water into a hot car as the heat shock warps and cracks things.

I would pull spark plugs and try crank it over, if water gushes out of plug holes pull the head and go from there.

JustinP Mentor

JustinP

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bugger, one of the first rules is never to put cool water into a hot car as the heat shock warps and cracks things.

I would pull spark plugs and try crank it over, if water gushes out of plug holes pull the head and go from there.

Will do.

It was hot water I put into it, luckily my dad was able to assist and bring it to me :cool:

JustinP Mentor

JustinP

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Do you still have the cam belt and so-on attached?

Sounds like an idler bearing has let go and belt has failed.

I would assume so, I did change the timing belt and both pulleys a few months ago..... It has been slightly noisy ever since though..... wonder if that had anything to do with it.

Would that explain the running on less than 6 cylinders, over heating and the leaking of water?

Thanks for everyones input by the way. I guess I really just need to roll up my sleaves and get out in the garage and start pulling it to bits.

kristafa Proficient

kristafa

Posted
Posted

sounds like head gasket, does the oil look like a caramel milkshake too?

make sure if you replace the head gasket you get the head skimmed flat. Machine shop should be able to do it for under $100

JustinP Mentor

JustinP

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sounds like head gasket, does the oil look like a caramel milkshake too?

make sure if you replace the head gasket you get the head skimmed flat. Machine shop should be able to do it for under $100

Haven't checked the oil or looked at the water properly yet, it happened late last night in a area with bugger all lighting, by the time I had finished towing it home all I wanted to do was go to sleep :cool:

I will get started on it this weekend.

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