10 replies to this topic

[olliecast]

Evening all,
Had a few coolant issues today at a sprint day at curborough as follows :
1) on the second run temp went up to 117 deg and noticed coolant steam coming from the vent at the rear. Inspected and the coolant was a couple of inches from the top of the bottle. Undid the bleed screw and returned back to normal level after a lot of air escaped. Coolant looked clean

2) next drove it up to temp and all seemed fine. Went for a few runs and perfect before lunch

3) after lunch temp would gradually creep up to approx 106 and the fan wouldn't bring it down. Holding the engine and 3k or going for a run cooled it. Rad would vary in hot / cold at the end of each run.

4) temps fine on way home, rising slightly in traffic. Looked at the coolant bottle at home and it's below min. Undoing the cap and the coolant jumps up to max.


Exam question, is this an air lock, hgf or both?

Had a good talk initially with rog and thought hgf. However I would have thought it'd have boiled over again.

Cheers,
Ollie

[Martin R]

Hmm, it does not sound promising. I would rebleed the system. Then take it for a good run. Leave overnight and remove the coolant cap in the morning. If it hisses loudly and or water rushes back into the coolant bottle the system is being pressurized. There is a more than a good chance its caused by a blow across the firering. HTH

[olliecast]

Cheers martin.

[jonnyfox]

Hope everything's ok.  

[olliecast]

theres an agu hovering outside the window!

got some great vids of today mind mate. enjoyed it. The mrs did too. and has given me the nod for an exige s

[Martin R]

Exige S? Were's the fun in that? You would have to sell your spanners       Post up some vids then.

[scatty]

im glad you took my advice ollie... "just rag it" always seems to clear any issue up....
didnt ian's sound glorious on full whine....

[olliecast]

Gave it some beams scatty. Cleared it up :-)

Trying to upload the vids. 1080p! God knows how the porn sites get them up so quick (the vids I mean ;p )

[olliecast]

here ya go:

[jimbo07g41]

If your starting to get the Trackday bug I would consider staying with the K series cars.  You can fix them a great deal faster and cheaper than if a yota cars go bang.  If you do go for an Exige go for one with the front oil coolers or make similar mods asap,

I am afraid I would go with Martin and suggest you have a tiny blow on the fire ring.  So you get a tiny amount of gas going into the collant circuit. When its such a small breach the car will run fine but it often shows up under stress.

[olliecast]

cheers jimbo, gonna get the hg sorted now.

was going to do it myself but may loose pre wedding mrs. points with the amount ive been working on it recently...

thanks for all the help guys,

ollie