- D_Moebs wrote:
- Hello! My name’s Daniel. I’m from Modesto California. I’ve always been about trucks infact I’ve had 5, lifted, wide tires loud exhaust and 10mpg. I never cared I got bad gas mileage because I always thought my trucks looked good. Well now I commute 45 Mins a day 1 way to work my dream job. And getting 10mpg freeway was killing me. So I bought a 2007 Scion tC from my gf. And it gets great great gas mileage. But I know nothing about it. I can work on my f-350 all day long. But I have no idea what I’m doing when it comes to this fwd 4cyl 5 Manuel car. So I’m curious. Is there anything I should be watching for? Also looking for cool ideas on what I can do. Maybe lower it a little bit? Thanks in advance everybody!!
hey daniel, welcome to CSTC (club scion tc)!
working on the tC is slightly different than an f-350, but an engine is an engine. Just some have some different design issues.
First yours is an 07, so you're right in the range of years that had the earlier model water pump from Toyota. Toyota had an issue with the bearing seal going bad and that would then cause the water pump to being to fail. Check along the drivebelt area and see what it looks like. If you see a pink-salt ice mixture the weep hole failed. Time to replace the water pump.
If the water pump fails, the engine overheats (yes I know you know that) but what you might not know is that Toyota didn't sink the cylinder head bolts deep enough into the block. Under normal temps the head will not pull up from the block, but get it warmer than normal (water pump failure) and you'll have this. It won't be something you can observe then it's too late. The leak is masked by the intake manifold.
Other things to know about is just normal maintenance wear/tear.
If it's an automatic make sure you do NOT flush the transmission ever! Drain/fill only. It will take about 3-4 drain/fills to replace all the trans fluid.
Take a look at the lid of the engine air filter. See that black mesh? That was added as a filter to stop gasoline vapors from escaping into the air. Problem is, there is NO ability to replace it since it gets clogged up in time. Then you have an air obstruction and there goes your mpgs/fuel economy! I removed mine with a small flat head screwdriver. It's held in with plastic melted rivets. Once you break it out, clean up with xacto or box cutter blade.
CRC Brand MAF sensor cleaner on MAF sensor (top of air box lid). Clean once a year, yes it gets dirty, your idle will be affected and your mpgs.
the 07's were under a service campaign because Toyota used lower tension piston rings. The result? Blowby and oil consumption. Some have done well with increasing the oil from 5w-20 to 5w-30. That's at your judgement.
Coolant should definitely be the Toyota stuff. It's a Organic Acid Technology with a healthy dose of phosphates. People have removed the Toyota stuff at 120k miles and everything inside is completely clean! Worth it when it's not much more expensive than stuff at autozone. Again no flushes, just drain and fill, there is a nipple on right side of radiator mount with petcock that you can use to bleed air (put clear hose on nipple) out when filling up coolant.
Spark plugs are NGK 4589 part, called Laser Iridium. Trust me, the engine likes this the best. About $7-8 a plug at NAPA. NGK has a problem with counterfeits so beware of ebay having a GOOD PRICE.
brake fluid, every 3 years. Use the Toyota fluid it has additives in it, the aftermarket doesn't. Toyota recalled master cylinders because the seals failed because those additives weren't in there. Same price for DOT3 fluid at a Toyota dealer as aftermarket so it's not like it's more expensive.
Brakes.. use Toyota rubber grease to lube up the caliper sliding pins every year. The toyota great is a lithium soap base glycol grease and no one but Toyota has it. It's the only thing that Toyota recommends because it's compatible with the rubber seals. DO NOT USE SILICONE! That will cause it to swell and good luck stopping..
Toyota part number 08887-01206 about $13 a tube, last a long time.
Alternators last about 100-110k miles. Have seen them dying at that age, will get a bunch of odd lights on the dash when it fails. Same with a bad battery.
If I can think of anything else I'll tell ya.. hope that helps.