Which of these problems most closely fit?

[horizontalkev]

symptoms of car:
Rapid rattling on start up for a second
Top end knock when warmed up/ not audible at idle
Very light blue smoke, not consistent and
No loss in power, not that i can tell atleast
Film of Oil in throttle body
Mobil 1 10W-30 being used

Possible causes:
Bad EGR valve
Bad PCV valve
Back knock sensor
Lifter knock (Not tightened?)
Bad timing
Other?

Checked so far:
Added Lucas gas treatment, no change.
Gas (used 2 tanks of 93)
Pulled valve cover to make sure no play (None)
Checked Anit freeze for oil
Checked oil for shavings/antifreeze

Suggestions?

 

[90tsiawdturbo]

Did you recently do a timing belt change? If so did you install the belt with the balance shaft 180* off

 

[horizontalkev]

I didnt ill ask the guy i bought it from. Can it be bad valve seals?

 

[slikvik]

I didnt ill ask the guy i bought it from. Can it be bad valve seals?

Yes, my second dsm had bad valve seals and it blew blue smoke bad under wot. They are a pain to replace as well.

 

[Aproductions]

I believe it is bad seals.

do a compression test. then if a cylinder is bad pour some oil in it and then retest. if the number changes it is your piston rings and if the number is the same it is your valves or seals

 

[horizontalkev]

Ill do a compression test. I have an appointment next monday at the shop so ill have them go deeper.

UPDATE:
The smoking has been fixed, atleast for now. Smoking was due to bad PCV valve - was replaced. What now? Im thinking one of my sensors is bad for sure. I had a P1494 code pulled like 3 weeks ago.

 

[swapped92talon]

The rattling in your top end could possibly be a worn out piston or rings. The reason it may go away after warming up and you cannot hear it at idle is because the piston and rings are swelling up enough once it is to operating temperature and you only hear it then above idle. No real easy fix for this...just to install new rings and hone the block. Good luck! BTW: a leak down test may give further information on the actual problem.

 

[horizontalkev]

Okay ill do a leak down. So put a drop in oil after doing initial readings and if the numbers change that means my rings are bad right?

 

[Junfan]

First a 1494 code is this P1494 Evaporative Emissions Ventalation Solenoid switch Or Mechanical Fault.

Here it the information on how to do a leakdown test and what the results will tell you.

Leak Down Test VFAQ

 

[horizontalkev]

First a 1494 code is this P1494 Evaporative Emissions Ventalation Solenoid switch Or Mechanical Fault.

Here it the information on how to do a leakdown test and what the results will tell you.

Leak Down Test VFAQ

Thanks ill be looking at that in a moment. Im getting my EGR valve replaced today. Do you thinbk this code could be the cause of my top end knocking? I heard a damaged egr valve under rare circumstances can make the motor knock.

 

[91Bomb]

Maybe just some lifter tick?

 

[horizontalkev]

Oh no its definitely a knock, so I suppose we can call it a lifter knock

 

[Colt4G63 also]

Wow all this talk about engine noise, and nobody suggested checking the oil pressure? Strange...

 

[horizontalkev]

Well I bought a new EGR valve and the P1494 code disappeared and the knocking seemed really faint and sounded alot better.. But after about 10-15 minutes the knock slowly came back, but not as loud. And i would check my oil pressure but i have the dummy light and idk how to switch to a gauge, or at least a temporary one.