Question about 1990 Toyota 4Runner

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Leaking antifreeze my 1990 toyota 4runner 4wd is leaking antifreeze from under center of engine.what can it be?

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There is a die that you can buy from any parts store. just dumps two of them in your anti-freeze and then run vehicle for a while then use a black light to find out where the leak is coming from. that is the best solution anyone can give you because there are some many different options that you will get from others including them trying to tell you that you have to replace exspensive parts that dont need replacing.


Posted on Jan 07, 2009


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4wd not engagingI have a 1990 toyota 4 runner and the 4wd not engaging. When I push the button you can hear clicking but the light doesn't come on and definitely the 4wd doesn't engaged since I got stuck...

The 90 toyota's had a vacuum 4x system. The easiest way to fix it is to find where the vacuum leak is, or to buy a manual hub conversion kit. Available at almost all part stores.

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I was needing an Owners Manual for a 1996 Toyota Hilux Surf - In English

Hi there: Try this links...

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Select Auto Repair Center, year, make, model and engine series.

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Hope this helps; also keep in mind that your feedback is important and I`ll appreciate your time and consideration if you leave some testimonial comment about this answer.

Thank you for using FixYa, have a nice day.

Jun 18, 2012 | 1996 Toyota Hilux

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1994 4runner swapped engine 3.0 to a 1990 3.0 everything hooked up good. Spits fuel out the intake. 1992 is a 2wd and 1990 is a 4wd. Is it ECU issue?

dont think so ?have you used the old 94 manifolds etc this happens with timing or valves sticking open ? would need more info about 1990 engine ie did you hear it run before change ????

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What is the best oil to use in my 1990 toyota 4runner 4wd

10-W30 is the specified oil for most operating environments in the US. 5-W30 for colder temps.

Mar 02, 2011 | 1990 Toyota 4Runner

1 Answer

I was changing my oil this morning and noticed a few drops of antifreeze on my transmission; (1990 toyota pickup 4wd) it is not running hot and is not low on antifreeze. any ideas?

Best thing to do is have an cooling system pressure test done, this way you will know for sure where and if it is leaking, could be rear block freeze plug, but with test you will know for sure.

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Apr 10, 2010 | 1990 Toyota 4Runner

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Leaking antifreeze from rear of engine block

There is a freeze plug on the back of the motor you cain't see.[under the bell housing]...may have a rust hole in it or just bad ??

Dec 20, 2009 | 2007 Toyota 4Runner

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Want to change CV boot in 1990 Toyota 4Runner manual 4WD

You can buy a whole reman axle for around 60.oo....dont mess with a boot..Lee

Sep 15, 2009 | 1990 Toyota 4Runner

2 Answers


You probably have an issue with the A.D.D. (Auto Disconnect Device) on the front axle. That is what lights up the light. I'd need to know the year to get you better info. If it is newer, check the 4WD fuse under the dash. But, in any case, if it IS in 4WD, the vehicle will make tire noises on a real tight turn, and it will lurch on the same tight turn, like it is trying to drill itself into the street. 4Runners do not have a viscous coupling, in 4wd, all 4 wheels run the same RPM.

Sep 10, 2008 | 1990 Toyota 4Runner

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