I just installed gsr cams in my b16 with str cam gears. when i went out for a ride eveything was fine untill 6k and then my cam gear sliped all the way. power compleatly droped off, i went and parked rite away. it was still ideling untill i parked, then i turned my car off and got a ride home to get tools. i put everything back and its runs fine but do you think i could have damaged anything? thanks for the input.

 

do a compression test, if you have really low compresson in a couple of cylenders then you probally bent a valve good luck

 

yeah, im doing that tomorrow, everything was runnin fine after i moved it back so im hoping for the best...

 

130, 230, 210, 210, so im thinking i bent a valve.....what do you think?

 

ouch, were you using the new str cam gears? and how much did you tourqe them to?

 

yeah, i forgot to tourqe them. do you know how much to? i cant fine it any where. but this give me an excuse to build up the head now.

 

Yea, sounds like you bent a valve... If you can I would leakdown your cylinder that gave you 130psi and see if you can track down any excaping air from your IN or EX... If so, then yea, you do just have a reason to build the head...

 

well the shop said that all of my valves were fine.... do you think that when the cams retarded all the way it could have blowen the head gasket? i didt really drive thet far after it happened so im not sure on any power loss. or could it have been the cams producing the lower number in cylinder 1, i just installed them and the were used.

 

From what happened to you there's no reason you should have blown a headgasket. Good thing your head/valves were fine, that's always nice. How much lower were your numbers from #1? Your best bet is to probably leakdown the motor. If you're valves are all fine you shouldn't have any leaks from the intake or exhaust ports/manifolds, if you rings are causing low numbers then that'll show up as you'll be getting a lot of blow by, and lastly if for some reason you headgasket did go out you should see some bubbling in the coolant (radiator). Good Luck again

 

well, the motor ran really strong before this happened. i had no smoke or anything. im ging to the stock cams back in and see if that helps any. my shop said it could be that. but on a better note im installing aftermarket camsprings and getting a port and polish.

 

Yea that's possible too (probably be my guess), just out of curiousity what cams were you running and is your bottom end internally stock?

 

i put in gsr cams, but im putting my si cams back untill i get my other ones. its a stock b16a with p30s

 

That's strange then, I thought you might have used some bigger aftermarket cams with a stock bottom end or something. We do CTR/ITR cams in stock B16's (PR3 slugs) all the time and though we've never tossed one on the dyno for a comparison they still normally feel a tad better.

 

did you check your valve lash? it might be holding the valve open very slightly. what did the shop do to test the valves for leaks?

 

im not sure what they did to test for leaks, but i think it was the cams...eveything was fine untill i put th em in. i will give them a call tomorrow and ask what they did.

 

well i got the head back, the strang thing is is that cyl 4 exhaust valves were bent, im putting everything back to geather and see what happens. i will post the results later.

oh and i found out that the head had some work done on it before. it have itr inake valves and some porting simaler to a itr head. i went ahead and put in some portflow valvespring too.

 

about the tourque specs on the cam gears. The str website tells the amount. I am almost certain they are 12 lb each though.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Seye &raquo;</TD></TR><TR><TD CLASS="quote">but this give me an excuse to build up the head now.</TD></TR></TABLE>

It also gives you incentive to purchase a set of adjustable sprockets that <U>can't</U> slip.

 

got everything back togeather. did another test.... 210, 215, 210, 210.

started it up and everything ran fine, but i think i need to redo the valve ajustment. it was my second time doing it and i hear some clicking. im gonna try again but if that doesn't do it im taking it to a dealer to have them do it.

 

yeah do that, glad you got most everything sorted out good luck with your car and BTW those comp. #s are perfect now

 

i haven't read the whole thread. but i seriously doubt they would have slipped if he had tourqued them to the recomended specs. STR send their gears loose. I tightened mine on my motor im building last night, and they are hella tight. 12 ft lb is alot on those lil *** bolts.

 

yep thats tight

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by B16EH2 &raquo;</TD></TR><TR><TD CLASS="quote">i haven't read the whole thread. but i seriously doubt they would have slipped if he had tourqued them to the recomended specs. STR send their gears loose. I tightened mine on my motor im building last night, and they are hella tight. 12 ft lb is alot on those lil *** bolts.</TD></TR></TABLE>

yeah, i didnt tourque them at all when they slipped. but i did now and at 12 lbs i dont think they are moveing anytime soon.


Modified by Seye at 9:02 PM 3/25/2004

 

just drove it around the block, sounds better but im still nervous to drive it past 4k rpm.

 

i;ve always wondered this:

if during hard driving, as like in a road coarse.

if you downshifted so hard that your tires chirped from slowing down so quick(the motor holding back the car, not brakes..

could that put extra load against the timeing belt since its slowing down the head?(since the crank slowed down so quick)
-could that cause slipping of the cam gears?

it's kinda hard to explain what i mean above..but just read.
thanks in adavance