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b20beast83 · 08-09-2009, 06:35 PM

Heres the deal guys

B16a Motor....
Rod broke, and bent #3 intake and Exhaust Valve.
Just 2 of them

So i replaced them both from a spare set.

Now, if i pour water in the Combustion Chamber, Water Leaks out the Exhaust and intake port.

Now the valve springs are not installed as yet...

I would like to hear some opinions.

Thanks

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mar778c · 08-09-2009, 06:50 PM

Did you check to see if the seat was damaged? Also, did you lap the valves?

b20beast83 · 08-09-2009, 07:09 PM

what do you mean lap the valves?

no the seat seems perfect.

mar778c · 08-09-2009, 07:17 PM

Check out this video.

http://videos.streetfire.net/video/T...w-to_80862.htm

Around time 3.20.

Lap in the valves then leak check with water again. If it still leaks then sometimes a heat cycle is enough to get the valve to seal up. If the leak test numbers aren't good then time for a valve job.

b20beast83 · 08-09-2009, 07:25 PM

Quote:

Originally Posted by mar778c

Check out this video.

http://videos.streetfire.net/video/T...w-to_80862.htm

Around time 3.20.

Lap in the valves then leak check with water again. If it still leaks then sometimes a heat cycle is enough to get the valve to seal up. If the leak test numbers aren't good then time for a valve job.

great video

i lapped the intake valve, BUT couldnt do the exhaust, there is too much carbon for the valve stick to 'stick' to the Exhaust valve.

Also spend 4 hours with purple blaster and a toothbrush trying to remove carbon out the ports.
Got any tips for me?
i still got some carbon in there

Fkned · 08-09-2009, 08:21 PM

You are going to have to get the used valves reground as they are seated to the other head and get the seats retouched also if I were you.

b20beast83 · 08-09-2009, 08:40 PM

what do you mean re ground?
like in the video?

is it okay to use a drill and wirebrush to clean carbon

08-09-2009, 06:50 PM	#2
mar778c Member Join Date: Mar 2004 Location: PA, USA Posts: 5,900	Re: rebuilding head with bent valve Did you check to see if the seat was damaged? Also, did you lap the valves? __________________ Good people: Synapse Motorsports,JDogg,b18c1_powered _si,CHEETAH, 86si,NA_is_best, Astig, McNews Automotive, geardog, 4g hatch, Innovative Motorworks

08-09-2009, 07:17 PM	#4
mar778c Member Join Date: Mar 2004 Location: PA, USA Posts: 5,900	Re: rebuilding head with bent valve Check out this video. http://videos.streetfire.net/video/T...w-to_80862.htm Around time 3.20. Lap in the valves then leak check with water again. If it still leaks then sometimes a heat cycle is enough to get the valve to seal up. If the leak test numbers aren't good then time for a valve job. __________________ Good people: Synapse Motorsports,JDogg,b18c1_powered _si,CHEETAH, 86si,NA_is_best, Astig, McNews Automotive, geardog, 4g hatch, Innovative Motorworks

08-09-2009, 08:21 PM	#6
Fkned Member Join Date: May 2003 Posts: 1,609	Re: rebuilding head with bent valve You are going to have to get the used valves reground as they are seated to the other head and get the seats retouched also if I were you.

08-09-2009, 08:40 PM	#7
b20beast83 Member Join Date: Jun 2008 Location: Miami, Florida, USA Posts: 1,202	Re: rebuilding head with bent valve what do you mean re ground? like in the video? is it okay to use a drill and wirebrush to clean carbon

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08-09-2009, 07:09 PM	#3
b20beast83 Member Join Date: Jun 2008 Location: Miami, Florida, USA Posts: 1,202	Re: rebuilding head with bent valve what do you mean lap the valves? no the seat seems perfect.