Question about 1991 Toyota Corolla

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Where is the bypass hose for coolant on 91 corolla easy job

I have a 1991 corolla that has a leaking bypass hose (little hose on the manifold) per dealer $$334.00. plan to do myself. where is this hose located and hard hard is the job?? pictures and instructions would be nice.

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SOURCE: 1991 Toyota Pickup Leaks oil


put new cylinder head gasket cover.clean the engine,if its check the cylinder head boltes and tight.

Posted on Sep 19, 2008

  • 1861 Answers

SOURCE: slite oil leak from rear valve cover gasket per dealer $650.00

Hello. Let me try to assist you the best I can, with the hope of achieving a FixYa rating from you for my assistance.

Changing the rear valve cover gasket on your vehicle would be not considered a "real" big job, but IS a time-consuming job.
In order to remove the rear cover, you first have to remove the intake plenum. If you do not remove the plenum, you can't get to the valve cover bolts that are under the plenum. After the plenum is off, the valve cover is easy to access. You will also need to replace the intake plenum gasket, if you do the job yourself.

I hope this information has satisfied your question.
Thanks for choosing FixYa for assistance!

Posted on Jan 28, 2009

alicantecoli
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SOURCE: pressure return hose repair for 1997 toyota corolla

no need to bleed it at all,just turn steering from left to right and its bled.never done one but it depends on whats involved and what you need to remove to get at it.Also over the pond anything thats not come from motor city they dont know how?? to do it.Just like in europe if its american with auto box then its telephone numbers.Dont be scared just get a new pipe and allow a saturday morning to change it but make sure you borrow a set of pipe spanners first,like a ring with a **** in the end so you dont round off the nuts.Think they are either 16mm or 17mm heads.

Posted on Jan 31, 2009

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SOURCE: coolant leaking on manifold, steaming.No hose or radiator leak.

i think its going to be the head gasket duto the way its leaking coolant. one of the water jackets maybe i would have it checked to be sure but it sounds like head gasket

Posted on Feb 03, 2009

  • 14 Answers

SOURCE: VSV replaced hard start 2001 toyota corolla

most of the time hard to start could meen bad battery week or coroded cables of a high amp draw in the starter motor

Posted on Aug 03, 2009

  • 2309 Answers

SOURCE: I have a 91 corolla with 78,000 miles. I've been

have the system pressure tested for a few hours, if pressure drops and no leaks are found you may have a head gasket leak and the coolant is going out the tailpipe

Posted on Oct 26, 2009

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I would guess the steering fluid has gummed up your solenoid, making it difficult for your starter to engage the solenoid.

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get under the car move things on your way to get to the hose and take 2 clamps off no big deal.

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I put coolant in radiator and I get a/c but my heat doesn't work. I think my heater hose was bypassed by the previous owner. How do I fix the problem?


You should be able to look down in between the motor and the firewall and see if the heater hoses are attached to the heater core. Most of the time when they are bypassed it is because the heater core has started to leak. Instead of replacing the heater core (not a fun or easy job) they just bypass it so they won't leak coolant. So, if it is bypassed your probably looking at replacing the heater core in order to get heat.

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Heating and cooling system leak under intake manifold. I cannot see the heater hoses without removing the intake manifold. What should I be looking for, this is a major leak.Thanks, Eric


You are not going to know for sure until you pull the manifold, but should be a easy fix, will be either the round welsh plugs, a corroded steel tube , or hose and clamp.
With the manifold off, a pressure test will squirt the coolant out , if it isnt immediately obvious where the leak is

May 06, 2010 | 1991 Toyota Pickup

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Coolant routing for 91 mazda rx7


Have no idea, but it's not hard to trace the hoses... they basically consist of an out from the water pump, and into the radiator, the out from the radiator and into the thermostat water jacket... then there will be 2 heater core hoses, in and out, which will be located on the firewall to the rare of the engine compartment. But if it's overheating the likely cause wouldn't be clogged hoses, unless of course you are leaking coolant which I'm sure you'd have noticed already. While the car is running and warm feel the coolant hoses, if they feel pressurized and hot then your water pump is likely good, and the likely cause would probably be the thermostat. Easy fix and cheap, too...

Mar 22, 2010 | 1991 Mazda RX-7

1 Answer

I have a 91 corolla with 78,000 miles. I've been losing coolant with no obvious leaks. Heat from the vents is sometimes hot, sometimes cool. I've checked and changed oil, and there's no coolant in the oil....


have the system pressure tested for a few hours, if pressure drops and no leaks are found you may have a head gasket leak and the coolant is going out the tailpipe

Oct 26, 2009 | 1991 Toyota Corolla

2 Answers

My 91 acura integra is stalling after idling for just a few minutes. I just bought the car and it ran fine until just recently. I also noticed a gas smell after the car started again.


Idle is controlled by two main sensors: the FITV and the IACV. The FITV is a mechanical valve that is controlled by coolant temperature (there is no ECU plug to it). When the coolant is cold, the valve is open and letting air into the Intake Manifold through a hole in the Throttle Body above the throttle plate. This creates a small vacuum leak which in turn lets the motor idle higher than normal (supposed to be above 1K RPM for warming up). As the coolant warms up the valve closes and no longer lets air in through the hole in the throttle body. From this point the IACV, which is Engine Control Unit controlled, is letting small amounts of air into the Intake Manifold through another hole in the Throttle Body. Any amount of extra air the ECU is not expecting will confuse it and you will get either a high idle or a roaming/hunting/fluctuating idle. The principal of engine to operate is a need to have a Fuel : Air ratio of 14.6:1. You smell the gas after restart since the unburnt gas, when the engine dies, got pushed out through the exhaust manifold.
Th following are in order one after the other until it fix problem.
1- Find and replace the vacuum leak on hoses mentioned above.
2- Clean the the gunk built up at holes mentioned above.
3- Replace thermal valve at engine block identified by two vacuum hoses connecting to the Throttle Body.
Good luck.

Sep 28, 2009 | 1991 Acura Integra Hatchback

1 Answer

Coolant fluid leaking below carberator 1989 dodge daytona


May not apply to yours, but I have seen coolant lines routed under intake (actually through plenum below carb)...the idea is to pre-heat and vaporize fuel to prevent "puddling" under carb. If you look at most v8 engines, exhaust is routed the same way, to do the same job. You may need to use a mirror to see under there to determine exactly what's going thats causing leak.

Apr 05, 2009 | 1989 Dodge Daytona

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