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Author Subject: Creamy coolant
prism7guy

Seasoned Pro

Location: DoncastAAAAARGH

Registered: 13 Jan 2008

Posts: 4,640

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Post #1
Well for those that don't look at my project thread i put a new engine in my track car, and used a second hand heat exchanger at the same time.
The engine runs fine but oil is somehow getting into the coolant but there doesnt appear to be coolant in the oil.

I'm not sure whether its the heat exchanger at fault or the headgasket, any suggestions for how to test which one is at fault?

All four cylinders reach 230psi with a compression tester and the engine runs spot on other than this.

I'm reluctant to take the head off to replace the headgasket if its the heat exchanger at fault, and vice versa.

Cheers for any input Smile

________________________________________

Goldie the track car.
Posted 8th May 2011 at 03:40
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stan_306gti6 Forum Admin

Location: Kent

Registered: 18 Jan 2004

Posts: 21,768

Status: Offline
Post #2
Are you getting any coolant pressure over what you should be getting??

i.e. If it's laid up for a couple of days, can you open the cap without the coolant coming out like a fountain??

Stan.

________________________________________

"Supercharged - 454.1bhp/317.5lb/ft"
Peugeot 306 GTi-6
2000 (X), Moonstone Love
Posted 8th May 2011 at 12:22
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peetypug

Seasoned Pro

Location: Spooning marksorrento205

Registered: 20 Feb 2011

Posts: 1,869

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Post #3
I've got the same problem on my rallye!
Oily coolant, no pressure problems or loss of power etc
I'm going to try a second hand heat exchanger, but first I'm going to bypass it and see what happens

________________________________________

Cherry rallye - DOB Thursday 29/04/1999
Team Rallye - the leaner, meaner, better looking sister of the GTI6 Big grin
roland rat wrote:
You sir either live for the 6 or have a mental retardation to still be repairing this!

The best engine in the world is the vagina, it takes any size piston, its self lubricating, starts with 1 finger, and every 4 weeks does its own oil change. It's just a pity the management system is so fecking temperamental. 
Posted 8th May 2011 at 14:53
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prism7guy

Seasoned Pro

Location: DoncastAAAAARGH

Registered: 13 Jan 2008

Posts: 4,640

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Post #4
The coolant does seem to be getting a bit of pressure, i noticed coolant was seeping out from the radiator cap when it was up to temperature, which i thought was strange as surely it should be coming out of the overflow hose?

I'm under the impression that there should be a bit of pressure when the coolant is hot due to the expansion, but this seems more excessive. I opened the top radiator bleed nipple when i had broken down to try and relieve any pressure before i undid the main radiator cap and the pressure was immense, blew the bleed nipple out and drenched me in coolant Doh

There was a little pressure after it had been stood for a couple of days when i took the radiator cap off the other day, but not much, just a small hiss as i undid the cap.

________________________________________

Goldie the track car.
Posted 8th May 2011 at 15:34
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prism7guy

Seasoned Pro

Location: DoncastAAAAARGH

Registered: 13 Jan 2008

Posts: 4,640

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Post #5
I've found the culprit Smile

To test i simply took the coolant hoses off the heat exchanger and joined them together, then ran a spare bit of 16mm ID tube from the heat exchanger into a small coke bottle.
Before starting the engine i got as much oil as i could out of the radiator.

I fired up the engine and let it run for a few minutes, eventually oil started to gather in the coke bottle, telling me it is the heat exchanger at fault Smile

________________________________________

Goldie the track car.
Posted 9th May 2011 at 00:41
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rallyeash

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Location: Devizes

Registered: 11 Dec 2006

Posts: 4,424

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Post #6
good news it isnt a HG then Smile

________________________________________

230 hp 2.1 16v XU 205 rallye on jenveysHyper Project thread here
309 3dr K20 Type R
Posted 9th May 2011 at 01:04
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prism7guy

Seasoned Pro

Location: DoncastAAAAARGH

Registered: 13 Jan 2008

Posts: 4,640

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Post #7
Yeah, i'd of been destroyed if it had been, been bricking it all week that it would be that LOL

________________________________________

Goldie the track car.
Posted 9th May 2011 at 01:09
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cooper666

Senior User

Location: doncaster

Registered: 27 Nov 2009

Posts: 778

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Post #8
Thumbs up good man

________________________________________

clio r27
ps3 id:cooperkloe



Posted 9th May 2011 at 01:13
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stan_306gti6 Forum Admin

Location: Kent

Registered: 18 Jan 2004

Posts: 21,768

Status: Offline
Post #9
Glad you got it sorted out mate, and for fairly cheap too....Yes

Stan.

________________________________________

"Supercharged - 454.1bhp/317.5lb/ft"
Peugeot 306 GTi-6
2000 (X), Moonstone Love
Posted 10th May 2011 at 02:00
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prism7guy

Seasoned Pro

Location: DoncastAAAAARGH

Registered: 13 Jan 2008

Posts: 4,640

Status: Offline
Post #10
It wouldnt have cost me too much if it had been the headgasket as i have a brand new richw uprated one here, new head bolts, cambelt kit etc, it would only really have been the head skim cost and all the ball ache of getting the head off in-situ.

I have my new heat exchanger sorted now, should be here by the weekend ready for more testing before i take it to germany in a few weeks. Touch wood nothing else goes pop LOL

________________________________________

Goldie the track car.
Posted 10th May 2011 at 02:02
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