Turbo maintenance

[rico]

Is there any turbo maintenance guides ? ie , stripping,cleaning rebuilding for the Supra or is it a sealed unit type system.

No luck finding a Haynes manual yet, but ill keep looking.

[Martin F]

There isn't a lot of maintenance you can do on turbos. Reason being that for lots of operations you have to check the balancing and can only use specialised equipment for that.

There are some re-seal kits available from certain suppliers but all these really do is give you a new oil sit to fit. Probably one of the few things you can do which doesn't require re-balancing. For all intense purposes they should be treated as an exchange item.

You won't find a Haynes manual for the MKIV supra as they never did one. The only manual readily available is one for the US model, which is still very applicable. Take a look on www.ebay.com (US site) or http://www.toyotaworld.com/cart....me.tmpl (http://www.toyotaworld.com/cart/toyotaparts.cgi?store=toyotaparts&action=file&file=home.tmpl)

Some of the pages from the manual have been scanned in at mki.com, take a look here http://www.mkiv.com/manual/index.html

Also good reading material is the 'new car features' book http://www.mkiv.com/specifications/ncf/ncf93/

Turbochargers are a pretty simple and self contained unit . The best way you can care for these is to keep your engine oil and coolant clean , and up to spec . I use Shell Helix synth , and for coolant the genuine Toyota red . Here in Australia , it has a very good reputation among the cyl head shops , that engines with Toyota red have consistantly less corrosion on the head and other passages like thermostat housing and so on than many other makes .

Cooling down a turbo after a drive is a good thing . Even tho they are water cooled , they dont need a long cool down like the older types of turbos with oil only cartridges ..... i leave mine runnign for 30 seconds after daily driving (some say no need , but i know that idle EGT is still much lower than cruise EGT) , and 1.5 mins if ive done a motorsport event . Sometimes more if the turbo's are glowing hard , like when your working them hard on a dyno or hwy runs .

And thats about it . I fit a PCV catchcan to all my cars simply for the fact of oil particles that are sent thru the engine and into the intake , go into the turbo , and get sprayed into the intercooler , and this isnt something overly good for the interooler as it numbs the eff of its output temp drops .