engine heat question

Discuss topics related to the CA18DE and CA18DET series engines.
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dhen
Posts: 634
Joined: Fri Jul 04, 2008 6:27 am
Car: MGA w/ CA18DET

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Okay, this is going to sound a little stupid, but I really don't know. My engine consistently runs 220 degrees. I understand that this isn't bad for the engine, but it's roasting me when I drive. Anyways, today I went for a slow drive and it was 65 degrees outside and I wasn't boosting at all - the engine was almost always under 3,000 RPM. Anyway, the engine ran consistently between 170-190.

Before I got home, I decided to test this and revved the engine to 7,000 a few times. Sure enough, the temperature went up to 220 and stayed there.

I know that turbos produce a lot of heat, and I'm running 10 lbs. of boost, but is there anyway that I can get this heat to go out the exhaust and not stay in my engine? Would a turbo blanket help, or does this just reduce the temperature in the engine bay itself?

I should probably say that the car this is in is almost 50 years old and there's very little airflow inside the engine bay. Anyone who's curious can read about it here:

http://www.britishv8.org/MG/DarianHenderson.htm

Thanks,

Darian


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r34 gtr
Posts: 8909
Joined: Sun Dec 29, 2002 9:33 am
Car: 98 Nissan Frontier XE 4x4
95.5 Audi URS6 Avant 5spd
03 BMW 330i ZHP 6spd
89 Nissan 240SX base CA18DET
Location: Creepin' in your crawl space
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Your car is awesome. Its got class. It doesn't look like you have a lot to work with as far as space. You could run the turbo inlet into the fender, behind the drivers side tail light. Ill bet the air in there is infinitely cooler than the air in the engine bay. Might do a good bit to help the engine run cooler.

Do you run an oil cooler? One of those would definitely help. You could also run a filter relocation kit to make changing the oil easier.

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rico05
Posts: 6895
Joined: Mon Jun 23, 2003 6:52 am
Car: 1992 RMS13 w/ CA18DET
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I run an oil cooler and dual 12" fans on a stock radiator (I used to run a oil cooler on a Koyo with a single 16") and I see no more than 190*. Before the oil cooler I never saw more than 200* even in Texas heat.

How is your thermostat? Run a flush and see if you have a blockage.

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dhen
Posts: 634
Joined: Fri Jul 04, 2008 6:27 am
Car: MGA w/ CA18DET

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Thanks, Tim, I really appreciate it. This was my dad's car, and it's been in the family since 1964. It sat and rotted in our garage for 25 years, and I wanted it to look good but I also wanted something with more power. Because of this I tried very hard to not do a hack job and make it something nice.

Anyway, that's a very interesting idea, but I heard that the length of the intake makes a difference. Is this true?

But I think that you found the problem. When I boost, the air gets hot in the engine bay, the heat has nowhere to go, and this heat gets sucked into the engine, making it hotter, etc. I guess a turbo blanket would really help, but I really like the idea of running an intake to the underside of the car.

Rick, I have a new thermostat. I did a chemical flush, but the engine block still has a lot of rust in it. I think it had been sitting for a long time before I got it.

Other than that, though, the engine runs great!

I have an oil cooler and a remote oil filter kit. The next time I change the oil I'll install them. May I could put a fan on the oil cooler?

Thanks again,

Darian


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