Coolant

Site Subscriber Joined: 29 Dec 2004 Posts: 395

Well, over the weekend i replaced my inlet manifold gasket, injector o-rings, thermostat, fixed a coolant leak and did some general cleaning and tidying under the bonnet.
Havn't bought coolant yet so just filled it with water.
Would this cause the engine to run a little hotter than usual or have i got another airlock Mad

Took me bloody days to get all the air out last time Sad

Forum Moderator Joined: 02 Mar 2004 Posts: 19978

no it won't make it run any hotter.

sure the thermostat just isn;t openign later?

did you check what temp you got? car may have had an 82/86 degree stat and the new one is 89 degrees.

Site Subscriber Joined: 29 Dec 2004 Posts: 395

It's an 88.
Same that was in there before.
I've got an 82 aswell so i'll try that and see what happens, also check that none of the sealant has beaded and broken off inside the housing and blocked it.

Cheers!

Forum Moderator Joined: 02 Mar 2004 Posts: 19978

why bother? how hot is it?

Site Subscriber Joined: 29 Dec 2004 Posts: 395

It's sitting on the third line all the time, if i'm driving under 30 the fan will be cutting in all the time.
Too hot for my liking

Forum Moderator Joined: 02 Mar 2004 Posts: 19978

aye that it is me boy. I have to say air lock issue, theres no enough coolant in there!

Site Subscriber Joined: 29 Dec 2004 Posts: 395

Any good techniques to getting the air out?

I've had this broblem too many times before and have yet to find a sure fire method to bleeding the system.
One bleed screw on the radiator, how generous of renault lol

Forum Moderator Joined: 02 Mar 2004 Posts: 19978

vacuum filling.

failign that pour it in squeeze for ages, bleed, squeeze more run it, squeeze, bleed run again etc etc.

You put the stat in the right way round?

Site Subscriber Joined: 11 Feb 2005 Posts: 2929

my car was on 80 all the way homw the other day Razz

Now though its hitting 100 when on motorway and up to 110 in town! Crying or Very sad

It never goes above the second bar though?

Site Subscriber Joined: 29 Dec 2004 Posts: 395

Vacuum filling?

Would this be done by sucking the water through the system through one of the hoses at the header tank?

Forum Moderator Joined: 02 Mar 2004 Posts: 19978

aye sort of. systems rigged up via a cap to an air line wich pulls out all the air, thus creates a vacuum. Checks are made to make sure it holds a vacuum (if not theres a leak) then coolant is out in vai the cap but a different line.

Theory is no air in there so the coolant will be forced into all the the nooks and crannies.

Spammer Joined: 27 Jul 2004 Posts: 5717

i always wondered if leaving the cap off the tank and running the engine would help to let the air out or not ????

Forum Moderator Joined: 02 Mar 2004 Posts: 19978

not really no.

But its very good at creating air pockets around the head due to localised boiling.

Level 10 User Joined: 18 Jun 2004 Posts: 614

Air lock's are a pain. The Valver got one at the mo'.

Site Subscriber Joined: 29 Dec 2004 Posts: 395

I give up

I have tried all bloody morning and i still have an air lock.
I've tried everything under the sun to get it out and have now ended up scolding myself lol

Looks like i'm going to have to swollow my pride and take it to someone to fill the system properly Embarassed

Site Subscriber Joined: 28 Jan 2005 Posts: 3547

park it facing up hill! thats the way i do it, never had an airlock on my valver

Mr Quoter-vator Joined: 16 Feb 2004 Posts: 7405

managed to do mine facing downhill Razz

lucky i guess

Site Subscriber Joined: 29 Dec 2004 Posts: 395

Weehhheeeeyyyy!

Well, looks like my efforts paid off, and i had given up aswell lol
On the way to work, temp sat just under half way all the time, no sudden drops (when an air lock reaches the temp sensor).
All the swearing, the burnt arms and scolded hands were worth it in the end lol

Mr Quoter-vator Joined: 16 Feb 2004 Posts: 7405

so what did you do?

Site Subscriber Joined: 29 Dec 2004 Posts: 395

The car was parked facing up hill (wasnt part of the plan, the drive is just on a slope).
I filled the system with water, then sucked like hell on the small pipe that returns to the top of the header tank until i got a mouth full of water.
Then ran the engine with the bleed screw off the radiator, water came out but then a few seconds later there would be a bit of air, so i kept this up (whilst topping up the tank) until no more air came out and there was a steady flow of water.
Cap on, job done.
The only downside of this was getting the bleed screw back in whilst i had scolding water pouring out of it. lol
Didn't think it had worked at first but havn't had any problems since.

Mr Quoter-vator Joined: 16 Feb 2004 Posts: 7405

A for effort gettin a mouthful of coolant.