Overheating after oil change

[mischf]

HELP!

I changed the oil in my V6 the other day, now when I stop I can hear a thumping sound from the engine cause the coolant is bubbling. I accidentally put 5 litres of oil in as I thought this was correct now I find out its 4.1 so I took out 1 litre of oil but it's still overheating. I put a new radiator in the other week cause the old one was stuffed and everything was fine until I changed the oil. If there's too much oil will this make it overheat?? And can I have damaged something by overfilling it and driving it around for a couple of days?? My cooling system is fine.

Please help thanks.

[genIIIbandit]

engine oil wont make it overheat, pressure test the cooling system, it will be leaking somewhere

[mischf]

It's not leaking man new radiator, cap, hoses and thermostat, flushed 3 times. The level in the reservoir doesn't drop either. The cooling system was fine for over a week, straight after I did the oil change I drove into town and when I got there I heard this thumping sound from the engine and all the coolant is jumping around inside the hoses. It's something to do with the oil change. I used oil flush too apparently that can be bad if there's too much crap in there ??

Stupid peice of ****!!!!!!!!

[AirStrike]

Did you check the oil level after you filled it, or just read how much it should have and removed some?
Check the dipstick first.
Who said the radiator was leakin, said to pressure test it all which I would recommend.
AirStrike

[mischf]

Man i'm not a moron i checked the dipstick it's on full now. I can't work out why the peice of crap would overheat from a ****in oil change. And there's nothing wrong with my brand new cooling system. LOL!

[Doctor Bob]

take it to someone who knows what they are doing, obviously theres something wrong with it that you cant spot.
Nobody called you a moron & people were offering advice trying to help.
now im not saying you are stupid but take it to a professional.

having said that, did you bleed the cooling system when you worked on it?

Rob

[stockvp]

what about inlet manifold gasket mine seems to leakin a bit from drivers side

[mischf]

What would coolant be doing in the inlet manifold? You mean where the air goes into the cylinders right?

[FXST01]

Did you reconnect the fan when you replaced your radiator?

[lazza44]

Maybe your thermostat isn't opening.

[bradcad]

...Just as a side note too much oil can overheat the motor...

if the oil level is high enough it can become aerated, and foam, which means that in each volume of oil there is a content of air, which doesnt protect bearing surfaces well.

one thing you can do is get an oil test to find out whether there is excess bearing material present.

How long did it run for with 5 litres in? How hard was it driven? If you filled, started, checked, then realised and dumped a litre, it woulnd't have damaged anything.

Was it running fine after the radiator change?

Which flush did you use, and was there a lot of carbon when you dumped it?

[mischf]

It says up top i drove round for a couple of days with the 5 litres, normal driving. I used nulon oil flush. And the oil was real crappy, it wasn't even black, it was like, dark grey and see through. YUCK. That was probably the flush though. I put GTX2 in it. And its a new thermostat. I know it's' working cause it opens up after 10 mins and the top radiator hose goes real hard. And I bled it too. The whole thing was running sweet as after I put the radiator in, for over a week. But the oil change buggered something up. There's no oil light or anything but the oil filter gets really hot. If you touch it for 1 second your finger burns for about 5!

[05 VZ SS]

Quick question - What is the thickness of oil you put in? Too thick can overheat a motor....

[Matty o]

maybe your fuse as blown under the steering column. that happened 2 mine and it overheated so maybe thats it. it is the one that runs ur ac and cooling system. just a suggestion.

[mouce]

Could also be that when you did the flush it dislodged a whole lot of junk, and that has since blocked the oil pickup line in the sump. Seen it happen before. Only way to clean it out is to drop the sump.

I know you said the oil pressure light doesn't come on, but that isn't always a good indicator that the oil pressure is right. Test the oil pressure and see what it's saying.

[mischf]

Hi, no the fan works fine. Anyway I've cleaned around the intake manifold and there's tiny bits of green coolant coming out from under the intake manifold, like stockvp said. But it's hardly leaking at all. My old radiator had a split down one side and leaked constantly and wasn't overheating. GTX2 is 20W50. So yeah there's a tiny leak from under the intake manifold but I don't see how that could make the coolant boil. That doesn't mean it's the head gasket though does it? The coolant is still bright green.

Thanks for the help everyone, but I think i'm gonna go buy a vl.

[holden007]

Change the oil again and see what happens, I used to use GTX2, wasnt satifised with it in the last three services, seems to have lost quality. Using Penrite 20-60 and its great.

[mischf]

BTW how do i test oil pressure? I ordered a service manual on CD off ebay a week ago but I haven't got it yet...

[AirStrike]

What ratio of coolant to water did you use?
AirStrike

[bradcad]

ok 2 things I'm thinking

1 is you've damaged bearings from overfilling

2 is you've clogged the sump strainer (as mentioned before) and you've damaged bearings

dont drive it

take an oil sample and get it tested- $33 you have the results in 2 days. Will tell you excess materials including bearing materials. I think you will find a lot of bearing material present.

consider flushing again, i can get you some complete fill flush, which will do a lot better than nulon- at i think $35 it can be reused up to 6 times. But, if I'm right about the bearings, you can clean the pickup by hand while you replace the bearings that are fried

consider a far better quality oil than GTX 2 ALWAYS

nulon does do a fine job, but as you mentioned, too much carbon & sludge can be a real problem.

[mouce]

Change the oil again and see what happens, I used to use GTX2, wasnt satifised with it in the last three services, seems to have lost quality. Using Penrite 20-60 and its great.

Penrite HPR30 is a damn good oil. I've heard mixed reports on the GTX2 oil, some people say it's fine, others say that it's crap. I've never heard a bad word about Penrite oils.

[richie_cky]

If there is bearing material in the sample of oil taken...whats the best course of action from there? Would my engine be stuffed? lol
Also, can the sump be dropped from the engine, without having to take the whole engine out?
Regards,
Richie

[bradcad]

If there is excessive bearing material present, then unfortunately yes, she is due for a freshen up. Problem is the suspect bearings need to be replaced, the matching surfaces need to be machined, the other bearings would have fouled because of the excess material, and once you've got it out you may as well go the full rebuild. Or a second hand motor..

if you go the secon hand, get an oil test & compression test on that one too before you buy it. Will give you a lot of information about internal condition, and will guarantee a good motor

[xcop5l]

Well heres what i think is going on > you havent bleed the cooling system properly and you have an air lock in your cylinder heads and its causing the coolant to boil thats your thumping. theres a quick fix for this. jack the front of the car up as far as you can take off your raidator cap and undo the little bleeder screw on the thermostat housing. then run the car till it gets hot always watching for air and topping it up as needed. DONT rev it becaue it wont heat up evenly and will devlope hot spots and the problem wont go away

[bandit0014]

Hi mischf i done a oil change in my vn 90 sereis 1 used penrite hpr 30 plus the lucas additive about 500mls since then its been overheating bad also used the nulon oil flush to now get this ripped the heads of thought it might be head gaskets got them serviced & crack tested & he checked the old head gaskets & told me there was no sign on leakage there but my oil pressure light was on so i dumped it & used penrite hpr 15 & alls good if you want to check if it is your headgaskets take it to your radiator repairer & ask him to do a co test on it it cost nothing & it tells you if you have carbonmonoxide in your water