Last Night I was Racing a CLK - stayed right next to him mirror to mirror till i mis-shifted fifth and rev'd the motor real high. I dont even know exactly how high cause the VAFC read only 9999 so i am assuming a was somewhere above that mark.

The engine seems to idle fine just idling between 1040-1050 sometimes 840-850 it dont go back and forth more then 10rpms.

My only concern is that my exhaust doenst sound good, it sounds as if i have full race cams. sorta like a bumbling sound.

Talks for a response ahead of time

Tomorrow i am going to look under the car and see if it can be a dent in the exhaust

Should i look into checking out my valves, How would i know if they are bent once i get to them?

 

It idles above 1k when the lights are on and about 700-800 when the lights are off. I doubt the valves are bent, but do a leak down test if you want to be sure

 

Next Level,

I did the exact same thing......and the exhaust was like I had a lumpy race cam in the car. I finally removed my head to do some other work and the exhaust valves were unseated or possibly slightly bent. Either way a leak down test proved this. I am not 100% sure but from my past experience it seems as if you have a valve problem.

LSR

 

If the exhaust sounds bad, you probably tapped them.

Get a leakdown done, asap. You can do a lot more damage if you keep running around on bent valves. You might get away with none, but do you want to take that risk?

Warren

 

As I just saw Warren's reply, I rode around on the bent valves for a LONG time because I needed a car at school for an internship and the car lost compression and was running like crap. Some days it would be so hard to start that I would have to hold my foot on the gas like a non-fuel injected car.....Bottom line, get it fixed dont be lazy like me.

LSR


[Modified by LSR 97, 4:37 AM 4/4/2002]

 

Thanks for the replies guys,
I am going to see if I can get my friends leak down tester w/hose
I got an air compressor so thats no problem i just dont have the sprk plug hose and those two guages...although there is two guages on my compressor.

Anyways the exhuast sounds exactly like a lumpy race cam like you explained LSR

If i dont find anything from the leak down or compression test what could it be WARREN...checked the exhuast visible this morning...No bends or heavy dents.

I sorta dont mind if its the Valves cause I need to pull the head for a thicker head gasket before i boost and i wasnt going to do it right away...maybe this is an omen

Anyone have the helms manual? I am still waiting for mine --3 weeks now
Maybe someone can email or fax me the pages on the valve job deal and what the part numbers are for the parts.... I dont trust my car with outer people and i am pretty good with cars so i will do it myself but i wanna make sure that TYPE R valves go back in there.. I heard a story around here that a kid had his R valves checked in his civic and they toke them all out and replaced them with regular ones and he was none the wiser till he had a certified tech look at it.

Anyhow thanks for the replies, and keep them coming if there are any other suggestions

 

OK i did A compression test
Cylinder 1 - 180
Cylinder 2 - 185
Cylinder 3 - 200
Cylinder 4 - 180

After that i did a leak down test and I heard no leaks on the intake or exhaust side.

This is how i did it (please let me know if i did it correctly)
Turned the crank til 1 and 4 topped out
I pumped 40psi into number #1 and nothin out the opened TB or the Exhuast and i did not lose any pressure in the air tank

Same for # 4

Then i turn the crank until 2 and 3 where topped out and did the same thing
with the same results.

Dunno what to do next.

Side note my Spark plugs are black like super rich black
and i can see alot of black deposits on the piston head

I bought new plugs but they gave me the wrong ones i think cuase they like longer

The stock plugs in there are NKG PFR6G

The ones they gave me where NKG PZFR5F-11

I dont think they rae the right ones but if anyone knows exactly let me know

Talks for all replies

 

can you record the sound? I don't think I've heard this sound you are talking about.

peac and respect,
Brian

 

Hey man this is a long shot but it might be the valve springs. If you were spinning that many rpms it may have stressed the metal alloy and now they are not closing the valves as fast as they should. (valve float) good luck.

 

I wouldn't go by this type of test. Get yourself a real leakdown tester and set the inlet pressure to 100psi ad then record the pressures from the 2nd gauge, then you know right away what the % drop is.


[Modified by SMSP, 10:11 PM 4/5/2002]

 

http://www.xs11.com/tips/misc/misc3.shtml

cheers