Motorsport thermostat - Page 2

magnust · 25-01-2012, 09:50 PM

- I have stable oil temps IMHO (can't push it over 125 ever)
- Headgasket is new

Any ideas what to check?

Bounce · 25-01-2012, 10:14 PM

Quote:

Originally Posted by magnust

- I have stable oil temps IMHO (can't push it over 125 ever)
- Headgasket is new

Any ideas what to check?

Thermostat

shane@mbtech · 25-01-2012, 10:16 PM

As Brett says the thermostat could be sticking.

IMO throw the motorsport one in if you are not daily driving it, in v cold weather and never getting up to temp.

The Gorilla · 26-01-2012, 10:27 AM

Hi,

If your running the 55 deg stat, then in daily driving
once its opened, if in good order it will stay open
unless you have ambeint air temp of 7 deg and less.

The idea of the Sport Stat, is to open and stay open.

When you had the head Gasket replaced did you
re- surface / skim the head ?

S54 is alloy head and should be re-surfaced everytime
the HG is replaced.

Many do not and get away with it, some are not so lucky.

Get and old thermostat, remove the centre but keep
the outer, prevents water caviataion, and fit.

If you have water temp issues with what is
effectively 'no thermostat' then its Water pump,
Rad or more likely head related.

Regards,

The Gorilla.

magnust · 06-02-2012, 01:03 PM

Thanks for the replies!!

Quote:

Originally Posted by The Gorilla

...
When you had the head Gasket replaced did you
re- surface / skim the head ?

S54 is alloy head and should be re-surfaced everytime
the HG is replaced.

It was done by an authorized BMW shop under insurance. They had problems finding what was wrong, the motor had a strong ticking noise. After failing to find the source of the noise they removed the head. They then sent it off for finishing since they found a very tiny hairline crack between cyl. 5 and 6. And finally they found a worn down exhaust rocker on cyl 6 - the cause of the ticking of course - so they changed the cam and all rockers. Would I be right in presuming they'd re-surface, being authorized shop probably knowing this is a must do ?

Quote:

Originally Posted by The Gorilla

...
Get and old thermostat, remove the centre but keep
the outer, prevents water caviataion, and fit.

Sounds like something I could take with me and swap to when at the track? Anyone know of any helpful pics on the net so I understand the "remove the centre but keep the outer, prevents water caviataion" better so nothing goes horribly wrong

/Magnus

25-01-2012, 09:50 PM	#11
magnust S4 - Getting the hang of it Join Date: Jan 2011 Location: Stockholm, Sweden Posts: 138 Casino cash: $1477	- I have stable oil temps IMHO (can't push it over 125 ever) - Headgasket is new Any ideas what to check? __________________ My Swedish track day / hobby racing site: www.rejsa.nu

25-01-2012, 10:16 PM	#13
shane@mbtech CSL Register Uber-poster! Join Date: Feb 2009 Location: warrington Posts: 5,419 Casino cash: $19783	As Brett says the thermostat could be sticking. IMO throw the motorsport one in if you are not daily driving it, in v cold weather and never getting up to temp.

26-01-2012, 10:27 AM	#14
The Gorilla S5, Sport Off, DSC M-track Join Date: Apr 2008 Posts: 740 Casino cash: $14401	Hi, If your running the 55 deg stat, then in daily driving once its opened, if in good order it will stay open unless you have ambeint air temp of 7 deg and less. The idea of the Sport Stat, is to open and stay open. When you had the head Gasket replaced did you re- surface / skim the head ? S54 is alloy head and should be re-surfaced everytime the HG is replaced. Many do not and get away with it, some are not so lucky. Get and old thermostat, remove the centre but keep the outer, prevents water caviataion, and fit. If you have water temp issues with what is effectively 'no thermostat' then its Water pump, Rad or more likely head related. Regards, The Gorilla.