Toyota Corolla Model (E-120) 2002--2008 Owner's and Fan Club

[Xulfiqar]

yes, its a vacuum leak if a port from the manifold is open.

[hasankhurshid29]

So today I went to mechanic and he said that you need to replace the engine because rebuilding will also cost around the engine cost. But I want to drag this engine with topping oil and don't want to invest money in it.

But there is another problem of Brake. Sometimes brake does not engage. Brake pedal feel normal. Mechanic saying this is also because of weak valve.
Is this statement have any truth in it?

[hasankhurshid29]

So today I went to mechanic and he said that you need to replace the engine because rebuilding will also cost around the engine cost. But I want to drag this engine with topping oil and don't want to invest money in it.

But there is another problem of Brake. Sometimes brake does not engage. Brake pedal feel normal. Mechanic saying this is also because of weak valve.Is this statement have any truth in it?

@Xulfiqar @sameerulhaq064 @capsat

[sameerulhaq064]

Get your brake's master cylinder checked.

[sameerulhaq064]

Also, why do you need to replace/rebuild the engine. Is the current one reducing oil/smoking? Loss of power? Low fuel average?

[hasankhurshid29]

Also, why do you need to replace/rebuild the engine. Is the current one reducing oil/smoking? Loss of power? Low fuel average?

Yes these problems are their but not much. Recently serviced fuel injectors and found out that there are 3 different types of fuel injector installed by jaugari mechanics.

Can you confirm that brake issues are not related to weak valves of engine?

[hasankhurshid29]

[Xulfiqar]

change your mechanic - for engine health use compression and oil pressure testers to identify if it needs work.

The brake not working correctly sometimes is always a bad vacuum booster in a corolla - replace that

Change the injectors to be a similar balanced set. Looks like its a collection going on with yours..

[hasankhurshid29]

change your mechanic - for engine health use compression and oil pressure testers to identify if it needs work.

The brake not working correctly sometimes is always a bad vacuum booster in a corolla - replace that

Change the injectors to be a similar balanced set. Looks like its a collection going on with yours..

It's the different mechanics I went to today but still the way he said that all the issues are because of bad valves and weak engine without doing any test and just looking at the very little smoke at the start of engine.

He was so sure that the brake is also bad because of bad engine valves and weak engine.

[sameerulhaq064]

Nope. Breaks are not related to the engine.

[Xulfiqar]

bad valves do reduce engine vacuum but the brake booster should hold atleast 3 pumps of brakes worth of vacuum. So thats a story being fed to you by them.

Valve job on this engine is not too bad either. Its a basic toyota DOHC engine with solid buckets as lifters.

[hasankhurshid29]

Thanks @sameerulhaq064 @Xulfiqar

Can you tell me the price of a fuel injector and brake booster? Secondly do you know any professional mechanic here in Karachi?

[abdkhan2]

Valves many 7k ma change krway thy. N idle tl hogya tk its been 2 years

[abdkhan2]

Kabuli injector cost around 1500 n new china 3500

[hasankhurshid29]

Thanks @abdkhan2

Idle is not perfect but is almost smooth but sometimes engine backfires on cng. Are you from Karachi?

[abdkhan2]

As my car is auto it used to stall in D and while cutting steering on idle..cng adjusted idle to 1600rpm so that it doesnt stall after a week i went for valve replacement

[abdkhan2]

Check the above reply

[abdkhan2]

Ur car also stall on cng.

[hasankhurshid29]

As my car is auto it used to stall in D and while cutting steering on idle..cng adjusted idle to 1600rpm so that it doesnt stall after a week i went for valve replacement

My car is also auto but it is not stalling at any situation. Back fire only happens sometimes (few times) on cng when shifting from petrol.

[abdkhan2]

My car used to back fire n shut off