UPDATED 3-8-07


hey again,

just did another compression test on my B18C5 engine.

#1: 150
#2: 150
#3: 30
#4: 150

obviously there is a major problem in the 3rd cylinder, i am guessing that i burned a valve up. because the engine seems to run fine, other than an occasional misfire code

the question is, that i have already replaced the valves in that cylinder. why would this happen again on the same cylinder?

i did everything but put the new valve in myself, and i wouldn't call this guy credible by any means.

should i just buy a whole new head, or am i looking at some serious issues?

if im gonna have this thing apart again, im doing it right all around, and all myself. any input is appreciated.


Modified by hamB18C5 at 1:12 PM 3/8/2007

 

previous carnage

 

Infamous #3 ...

 

did you check the valves after he did them?? Did you replace springs and retainer's at the same time? Something is definately not right w/ it being same thing.. I would take head completely off and inspect your bottom end, then possibly replace you springs and retainers along w/ valves or just go aftermarket.

 

yeah, thats the plan. im going over the whole thing with new parts. probably aftermarket right down to the headgasket.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by hamB18C5 &raquo;</TD></TR><TR><TD CLASS="quote">



previous carnage </TD></TR></TABLE>

Looks like you are running pretty hot to.. What do you have your timing set @??

 

at that point in its life was at;

+3 intake
-2 exhaust

now its set at zero

 

Yea seems a little extreme for a mild setup.. I wouldnt go so far w/ intake cam exspecially if you are going to retard the exhaust side.. Did you dyno those results?? Because I dont see you gaining HP w/ your head looking like that in the end..

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by hamB18C5 &raquo;</TD></TR><TR><TD CLASS="quote">hey again,

just did another compression test on my B18C5 engine.

#1: 150
#2: 150
#3: 30
#4: 150

</TD></TR></TABLE>


I would say that while you had the head off you should have replaced your rings too. I would think if you had a hole in another valve your compression would be 0 on #3.

 

That'll do it.

 

i did dyno, results where not happy either. they said it was cause my VAFC was all screwed up.

153hp at the wheels, 4wd dyno.

this car has been nothing but a pain in the *** for me cause ive been fixing the previous owners **** since day one. literally.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by hamB18C5 &raquo;</TD></TR><TR><TD CLASS="quote">i did dyno, results where not happy either. they said it was cause my VAFC was all screwed up.

153hp at the wheels, 4wd dyno.

this car has been nothing but a pain in the *** for me cause ive been fixing the previous owners **** since day one. literally. </TD></TR></TABLE>

Sorry to hear that man.. Just take you time on this one, and do the work yourself so you know that it is good. Dont give up on it. You should also drop the oil pan, and look @ the bottom end and see if there is any hot spots on the cranks bearings ect.. And look in oil pan for any kind of metal shavings..

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by berettagtz117 &raquo;</TD></TR><TR><TD CLASS="quote">

Sorry to hear that man.. Just take you time on this one, and do the work yourself so you know that it is good. Dont give up on it. You should also drop the oil pan, and look @ the bottom end and see if there is any hot spots on the cranks bearings ect.. And look in oil pan for any kind of metal shavings.. </TD></TR></TABLE>

thanks so much for your advice, input, and support. im definatly gonna try and make the best of the situation.

 

Glad I could help. Just dont rush it. Take pics too.. I love see motor work..

 

all your numbers are low... i put a hole in cyl3 aswell and when i put the head back on, i skipped the T belt(tensioner issue) then when i redid it again, did a compression check 200 300 150 200. so right now im thinking i either rebent valves or i killed some rings. gotta do a leakdown

 

yeah man, its so hard to tell without tearing it apart. which i have no time or money for.

did the cam timing do this?

 

Next time you replace the valves use valve grind. This will let the new valves properly seat in place. If not they may improperly seat and you will have a compression leak.

 

thinking about sending the head to inlinefour.com to have portflow assemble the head for me!

any advice on that?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by hamB18C5 &raquo;</TD></TR><TR><TD CLASS="quote">thinking about sending the head to inlinefour.com to have portflow assemble the head for me!

any advice on that?</TD></TR></TABLE>

$$$$$$$$$$$$

 

is my bottom end in question?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by hamB18C5 &raquo;</TD></TR><TR><TD CLASS="quote">is my bottom end in question?</TD></TR></TABLE>

Yes, you need to pull the head (it's really not that much work, other than getting those mf'ing intake manifold bolts off) and look at the bottom end and the head. There's clearly something wrong, but all those comp #'s are off, unless the tester was bad or the procedure wasn't done correctly.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Dave-ROR &raquo;</TD></TR><TR><TD CLASS="quote">unless the tester was bad or the procedure wasn't done correctly.</TD></TR></TABLE>

thats a possibility for sure

 

We need to just call up mike and have him rip the head off and replace : valves, springs, retainers, guides, clean the head up, inspect block for damage and call it a day. seriously ian i think he'd hook it up and he FOR SURE knows what he's doing. i'd honestly just replace everything with OEM gear but you know how i am about OE ****

 

Whats the latest on this???

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by NamechangeRcupofJoe &raquo;</TD></TR><TR><TD CLASS="quote">Infamous #3 ...</TD></TR></TABLE>

my thoughts exactly.....