vs overheating

[ashhroyan]

hey guys i have a 95 vs exec
and its been overheating like crazy i suspect a blown head gasket or a cooling system issue
so i used irontite a cooling system sealer
and im thinking of using chemiweld as well for the gasket
so was just wondering anyone else have any other ideas on what would be best ?

[woteva]

Have put Chemiweld in 2 different commodores. Both experienced water pump failure within a few months after.

[ashhroyan]

shit that doesnt sound too good any thing else or just get a new gasket machine the head and do all that?

[justbad4you]

hey guys i have a 95 vs exec
and its been overheating like crazy i suspect a blown head gasket or a cooling system issue
so i used irontite a cooling system sealer
and im thinking of using chemiweld as well for the gasket
so was just wondering anyone else have any other ideas on what would be best ?

Chemiweld isnt what id use....

[hako]

Why are you sure that you have a failed head gasket?......overheating can be caused by many other reasons also head gaskets rarely fail in Commodores unless they are cooked.

[db_notso]

does it leak anywhere? fix leaks and flush it
does fans work
radiator cap seal rubbery and not cracked
milk in your oil or milk in your coolant = head gasket
top and bottom radiator hose hot to touch when coolant hot/ gauge halfwayish = if no either vlocked radiator or failed water pump NOTE failed pump on these get tight ass and notchy so take belt off and spin pump to check for free movement and not difficult to turn..

overheating as in the gauge goes into red is normally present with another fault
like loss of coolant or blockages or eroded water pump blah blah blah if you want help
on overheating you need to check these things to get direct help on your fault... pm me if you get stuck...

[h0ldenluva]

i just replaced my 96 vs motor 13 days ago cause of same problem as u for me it was cracked cyl head so i put a vt motor in. and when u refull your raditor u must bleed the air out by putting a bottle of water on top of raditor full bottle so water level is higher than thurmostat start car release screw that is on top of thurmostat till water comes out
and your done
also try a new raditor cap that can cause them to over heat
if u are unsure of ur broblem go to raditor shop and get them to do a test cost like $20 they can tell u if u have cracked cyl head or blowen head gasket
gl

[EDGE3]

What do you do if the bleed screw has corrosion how do you bleed it then?

[db_notso]

new screw ~! hammer and a flat blade (big fat one) tap and turn it'll come loose~

in edges thread i explained to him a bleed without using bleeder screw
link below....
Leaking coolant

[ashhroyan]

I'm not sure was just a guess
But I am leaning towards blocked radiator or a failed waterpump
Because the radiator caps fine theres no milk in the coolant or engine oil but the radiator hoses get hot as #### there's no leaks after about 10 minutes of idling the engine touches H and it does run pretty rough so failed water pump u reckon ?

[db_notso]

does fan come on?

[ashhroyan]

It does but it's pretty loud and it's not always on not too sure if that's how it's meant to be

[db_notso]

when the cars hot it should come on until the temp drops down then it switches off
if you have air con turn that off then let it warm up and see if the fan comes on (dont let it go into red though)

[ashhroyan]

The air con was off and soon as it started getting warm it did come on but it kept rising

[ashhroyan]

I mean the fan was still on but the temperature kept going up

[db_notso]

okay then,
take cap of radiator
fill to top
open bleed screw near engine and top radiator hose
fill it to top
close screw
start engine
keep filling it as it idles
keep doing this until it wont take any more coolant/water if no coolant

in a normally operating motor at IDLE you can have the cap off until it warms up (10-15 minutes max)
the fans will come on then after a short time they will turn off
if fan comes on and water level goes down more top it up again

see if fan goes off by itself without the cap on AT IDLE!~
if it does you have a faulty or incorrect pressure cap
if fan stays on and it goes toward the red then it likely needs;
the bleed screw opened again engine off then retry,or
the pump isnt working well enough either blades worn OR shaft binding or snapped(shagged out due to age), or
cracked head , normally it wont run very well in that case
blocked coolant passages (needs a flush)

but you will need to do the check on the cap and fan first,
and once its all warm you can check the radiator top and bottom hoses are both warmed up

[ashhroyan]

Ok I will try that first thing in the morning and let u know how it goes
Is the bleed screw the one above the thermostat ?
Thanks a ton

[db_notso]

sure is if you do a search on here you will find heaps of in depth ways to flush bleed etc the cooling system
just do it all on a flat surface
watch the temp gauge doesnt go into red
and push hard and even tap end of flat blade with hammer when you try to undo the screw
lots of people kill the screw and when you do it up dont overtighten it....

you will prob have to pmsg. me as that way i wont forget to check

[ashhroyan]

Ok I'll be sure to remember that cheers
I will for sure

[VS_Pete_1]

I used a pair of pliers to open my old screw before i got a new one.

Mate did you have the heater tap fully open aswell.
When I first got mine I was in peak hour and had to pull over and let it cool down.
It was never bled properly as in the heater was never opened fully to hot.
After I opened it right up a heap of air came out.
Also I`d be replacing the thermostat mine was running warmer not hot replaced it and flushed it all good now.

Let us know how u get on.
Good luck.
Pete.

[justbad4you]

Ok I'll be sure to remember that cheers
I will for sure

use good coolent as well

[ashhroyan]

ill make sure to do all that go get a new thermostat and a new radiator cap just in case
yeah i got some good coolant i bought the other day
cheers