dsm482

Hi,

f... me.
I had a cam bolt come loose.. causing my car to die on the road at pretty much slow speed coming off gas station.. i heard it change sound, and soon as I left the station bam.
upon inspection cam bolt was loose and cam gear had wiggle room.
didnt jump timing on t-belt signs. but somehow that losseness cause the cam not to able to lift the valves.
I did the timing belt and replaces the cam seal year an half ago.. it was toqued to spec.. I dont know why it came loose.. I know for sure i toqued it to spec.
tightend cam bolt. valves move, cam moves..
car wont start.. I thought bent valves.

Compression test I did.

cyl 1-2-3-4
150-170-140-130
charged battery
fuel pump fuse pull out
throttle wide open.
cranked 3 count, all the same way all cylinder, repeated several times to verify. those are the numbers.

what the spec 135psi? kinda confused.

also hooked air to each culinder found TDC to do leakage test.
I only have the cage at the compressor which is 6 ft away..
120 psi.. I could not hear air coming out of exaust or intake.

at that psi i would assume i should feel air drop or come out.
acts like its sealed at 120 psi which isi know 10 ft hose.. but still there is enough pressure for me to see if it leaks air..

I dont feel it by hand. and no bubble in coolant..

has me bummed out.. i know i dont have the regulator at the cylinder, but still, i just wanted to verify my compression numbers and get a sense which valve is leaking.
I am considering getting cylinder leakage tester to try and make sure i get 100 psi .. but still i should feel air coming out of intake or exhaust.

Any thoughts how i valve can be bent..

dsm482

bad explanation i have a gaauge at the compressor saying 125 psi, and 10 ft hose..
turned and tested eah cylinder at tdc. could not hear leak or feel. nor did the psi at the compressor dropped . and no, the compressor wasnt working. this is 80 gallon compressor shop size.

I didnt have the leakage tester, so i just put air to it.... i guess i can get leakage tester to make sure at point of entry i have 100psi. why would that change or register, dont know but thats my next step.

my cheap way was to feel some air coming out..

ezone

If the gear got loose enough to spin free of the camshaft, it likely tweaked some valves.

Cam gear has to be correctly indexed to the camshaft, and when the bolt came loose it probably allowed the keyway (between pulley and shaft) to get beat to death--- so the gear may not be perfectly aligned with the camshaft now.

A half width of the keyway might allow the gear to rotate far away from perfectly indexed, and be roughly equal to a couple teeth or more out of time.
I place the compression tester gauge where I can see it, and crank the engine until the gauge quits climbing....and keep on cranking to let it hit several more times just to make absolutely sure it's maxxed out the gauge before I stop cranking.
I expect to see 180 PSI or higher on these engines using my gauges and my methods.

dsm482

ok i redid compression test .. cranked all the way till needle stop moving which was 5-6 at least
readings are :
cyl 1-2-3-4
185-200-170-150

re did cylinder leakege test . same way applied 125 psi , with regulator befoe 10 ft hose.. no drop on pressure of air on number #4.. thats at TDC. no air coming out of air filter and no air out of tail pipe..


my next step was to check valve lash an adjust and see if that will give me indication..
am little confused why i dont get any air coming out of nowhere on cyl 4

dsm482

good point on cam gear i will check for slop now..

dsm482

thats the way i did compression testing myself till i read on some forum you suppose to do 3-5 counts.. so i did it both ways

ezone

Still quite uneven. Not good.

Using what? If you used the hose from the compression tester, you have to remove the Schrader valve from the hose....Otherwise there will be zero air flow through the hose.


IF you do this leakdown test....screw the other 3 plugs in their holes while you check any cylinder.
I sometimes stick one of my blue gloves over the tailpipe to help show leakage into the exhaust.
Same for intake, stretch a glove over the throttle body opening and make sure all other vacuum hoses and ports are not open.
A valve that got tweaked should have gained some clearance, so if you think have to tighten up the adjustments---it may be bent.

dsm482

damn your bright , **** the shreader vavle i forgot idiot I am

ezone

Don't drop it and lose it!

It is not the same design as the Schrader in a tire valve stem, one of those will cut the compression tester readings by about half.

dsm482

i got it , i got half the valves bent, just like the compression says the good compression test. how can i be that dumb freaking shreader valve i forgot.. i been bummed all day why it didnt make sense the leakage)...

ouch either way i need some vaseline, this will cost me a buck or two to fix, even if i fix it myself.. dont want to throw it away i had 200 compression this summer when i was checking for the headgasket and it has 275k miles.. i maintained all even ac works...
all the sudden it makes sense

dsm482

i owned the car since 3k .. second owner.. and i do all my own work...

stinks, i never seen cam bolt come loose.. i torqued it for sure when i did timing belt 2 years ago almost.. just checked paperwork.. it took vibration this long to loosen up.. scary.. i will loctite that bitch when i fix it.

ezone

Check calibration on your torque wrench!

I just sent one with my Snap-on rep to be recalibrated, it was consistently about 20% higher than target. He has a digital checker on the wall of his truck.

dsm482

i had them checked.. good idea to check them again.. i do check them once a year.

dsm482

if u are right again, i owe u a coffe drink

dsm482

https://ithaca.craigslist.org/pts/5470129131.html

is this head d17a2 the same.. I have sedan dx... which i believe was d17a1.. whats the diffrence , can i make that one run on top of this motor.

ezone

VTEC is the difference, your engine does not have it and your computer does not have it, but that d17a2 head in the sale ad has VTEC.

It may bolt on though it would not be able to use the VTEC system. You might be able to find a standalone controller to operate the VTEC valve though.

dsm482

so which civic has one iwth vtec.. EX was VTEC only?
how can i tell the diffrence , should say on valve cover vtec?

they both are SOHC

ezone

Wiki

https://en.wikipedia.org/wiki/Honda_D_engine#D17A1

https://en.wikipedia.org/wiki/Honda_D_engine#D17A2

dsm482

dude u know to much honda stuff)

ezone

Nah, I just google a lot.

Actually if you type broken Civic questions into google it leads you right to this forum quite often LOL