Club G40 Forum

Technical => Engine and Transmission => Topic started by: rocore on November 03, 2008, 01:43:20 PM

Title: Engine Temperature
Post by: rocore on November 03, 2008, 01:43:20 PM
Hi all...

This is my first post... Just bought my first G40 and totally love it (until the head gasket went)! what engine temperature should it be running at?

rocore...
Title: Re: Engine Temperature
Post by: G4O LP on November 03, 2008, 03:49:10 PM
90ish
Title: Re: Engine Temperature
Post by: rocore on November 08, 2008, 04:44:38 PM
Mine has just returned from having headgasket... waterpump done... Took it for a really good test drive today. Temperature seems to run nicely around 90 but when i slow down to a crawl in heavy traffic it creeps up to about 100ish and stopped it hit 110... the fan kicked in at 110. the temp light didn't come on so im guessing the over heating temp is higher?

My mate said he would put a manual fan switch in which would keep it cool... any thoughts?
Title: Re: Engine Temperature
Post by: SteG40 on November 08, 2008, 04:52:14 PM
Thats sounds about right, they do get very hot in traffic.
Title: Re: Engine Temperature
Post by: rocore on November 08, 2008, 04:54:11 PM
Thank god... since the headgasket went on the way home i've been really paranoid! I might replace the temp sender too just to be on the safe side. and with the manual switch i can flip it over when i want... sound good?
Title: Re: Engine Temperature
Post by: rocore on November 10, 2008, 01:56:59 PM
also thinking of fitting a bigger fan from a Corrado.. anyone else done this?
Title: Re: Engine Temperature
Post by: hayesey on November 10, 2008, 02:26:21 PM
corrados have two smaller fans don't they?  but you'll not fit both onto a polo rad as corrado ones are miles bigger.

It should have a twin speed fan on it with three wires on the connector.  The first speed should come on at just over 90deg and then 2nd speed (faster and louder) at about 110deg.  Sounds to me like your first speed isn't working.
Title: Re: Engine Temperature
Post by: GSBellew on November 10, 2008, 03:13:41 PM
Corrado's have one larger fan with lots more blades, well the 16v's and G60's only have one anyway.

I have a 16v Corrado one on mine.

It will fit with slight modification to the Corrado's radiator shroud to clear the radiator temp switch and bottom left radiator hose if I remember correctly:

(http://i115.photobucket.com/albums/n311/gsbellew/STP60922.jpg)

(http://i115.photobucket.com/albums/n311/gsbellew/STP60921.jpg)
Title: Re: Engine Temperature
Post by: rocore on November 10, 2008, 03:17:01 PM
It should be working as i had a new switch fitted last week but i'll check anyway...

I'll have a look at the corrado shroud and see what it entails... is the corrado fan 3 speed too?
Title: Re: Engine Temperature
Post by: GSBellew on November 10, 2008, 03:25:45 PM
Its a twin speed the same as the original, uses the same plug too, so once you bolt it on its only a matter of plugging it in.
Title: Re: Engine Temperature
Post by: hayesey on November 10, 2008, 03:31:24 PM
that's interesting, I've only really looked at VR6 ones, just assumed they all had the same setup.  So do you think that's better than the polo one?
Title: Re: Engine Temperature
Post by: rocore on November 10, 2008, 03:33:38 PM
bigger diameter with more blades should shift more air i thinks... really wanna get this done.
Title: Re: Engine Temperature
Post by: rocore on November 12, 2008, 01:36:40 PM
The standard fan should be dual speed shouldn't it? 90 and 110? mine isn't kicking into at 90? thats not right is it?
Title: Re: Engine Temperature
Post by: hayesey on November 12, 2008, 01:51:27 PM
yes it should be twin speed. 
Title: Re: Engine Temperature
Post by: rocore on November 12, 2008, 02:18:14 PM
somethings not right then! think another visit to the garage is in order... If a manual switch is fitted.. will the fan still work as normal (twin speed) but the new switch overrides it?
Title: Re: Engine Temperature
Post by: rocore on November 12, 2008, 07:54:52 PM
Just fired some current in the fan.. that seems to be working fine so think the new switch that was put in last week is a dud... or there is a dodgy wire somewhere!
Title: Re: Engine Temperature
Post by: PeteG40 on November 12, 2008, 08:05:09 PM
either new switch is a dud - or often under the switch in the radiator is full of crud
Title: Re: Engine Temperature
Post by: rocore on November 12, 2008, 08:34:10 PM
Will strip it out at the weekend and check it out...
Title: Re: Engine Temperature
Post by: rocore on November 15, 2008, 06:00:04 PM
I checked it all out today...

The switch it coming on at the right rad temp... but whilst the rad is only reaching 90 degrees for the fan to cut in... the temp gauge is reading 110 as that reading is taken from the Stat housing. that right? then the fan kicks in on speed one and the temp gauge goes back down to around 90...

I have gone and bought a 3 way switch to mount on the dash so i can turn the fan on manually if i want. Also... can you get stats that open at lower temps? and would it be worth changing the black temp sensor on the stat housing.... incase its giving weird readings?

hope that all makes sense!
Title: Re: Engine Temperature
Post by: rocore on November 17, 2008, 01:32:31 PM
Car doesn't go over 90 degrees my new switch turned on... woop.
Title: Re: Engine Temperature
Post by: lance on November 19, 2008, 06:15:03 PM
i have bought 2 8" slimline fans gonna put one on the front an one on the back wire them up so one is on at first speed an second comes on with speed 2. well ill see if i can get to do that ha ha.
Title: Re: Engine Temperature
Post by: rocore on November 23, 2008, 07:55:00 PM
let me know how that goes...  think i have got a rado fan now... will bung it in when i have a spare 5 mins!