"taken care of in regards to letting it warmup and cooled down, failure to do so can lead to sludge and varnish which *will* destroy it prematurely. This becomes even more important with a chip and BT. "

Wow: warmup needed (I thought this is a thing of the past)? Need guidance: How long? (assuming that water or oil temp has reached a certain level. How? (Assume keeping the load (gas pedal) and RPM down (how low)?

Even more: cool down? How? Let car idle for a while before shutting off (that typicall INCREASES the temp stored in the engine)? Ease of the throttle on the last mile before shutting the car down?

Volker

 

BAT= BIG @SS TURBO!

OCI is a new one on me... usually LOF (lubrication, oil & filter) is the acronym.

The turbo is usually the only thing you have to worry about with higher mileage. Other issues are timing belt services and synthetic oil changes to prevent sludge.

Nice choice, good luck!

 

It is definitely still important to warmup/cooldown especially if you are gonna use a heavy foot. Warmup- just need to let water/oil warm up to normal level and maybe not anything over 5,000 before that. Cooldown- turbo has oil flowing through it, so when you turn off your engine without at least a couple of minutes of cooldown (just idling) that hot oil will tend to burn once engine is off- hot oil sitting in your turbo, causing a build up of sludge over time, especially with a chip running more boost making your turbo run hotter.
Your engine temp should not increase while idling (could mean you need a new thermostat- not a big deal to fix) and the oil temp will go down.

 

my 1.8T has a leaking valve stem guide that, combined with a clogged catylitic converter caused the turbo to over heat and damaged the spool. the turbo sounded as if the spool was making contact with the outer shell when it tried to spool up. this happened at 108,000 but i think it was caused by the use of low grade gas and standard oil by the previous owner. does anyone have any advice other than a new cylinder head and a new turbo? also, in reguards to the turbo needing to cool down... the audi S4 2.7t will continue to run the cooling fan after the car is turned off and key is removed. this is true of several other turbo cars so just to be safe i would let it keep circulating for a few minutes after a hard run. if you are really concerned about your turbo over heating though you should consider a FMIC. its the most efficent way to keep the turbo cooler.

 

test

 

arg, this forum can be frustrating!

 

Oil and water cool the turbo. A FMIC is designed to further reduce intake air temps (IATs) than the stock SMIC, not cool the turbo.

 

Additionally, the coolant fan runs with the engine off to keep air moving across the engine bay when it's hot under there. It's not sufficient enough to cool a red hot turbo after a hard run. That's what turbo timers and electric water pumps are for.

 

If you're worried about this just get a turbo timer. $100 bucks'll get you a good one and IMO they're well worth the peice of mind.

 

Why is that feature (fan running after shutoff) not on the A4? This, combined with electric water pump would make SO much sense (actually, for EVERY car, but certainly turbos).

It only takes a timer or relay (no cost). Are electric pumps available as aftermarket?

Has someone rigged it that way?

Volker