dual pattern cams

Rev · 05-24-2006, 06:31 PM

I hate to say it but pulling the heads to check for valve train- piston damage is not premature at all from what I've read so far. Something is badly wrong here. I suspect valves kissing the pistons for some reason or coil bind as previously suggested. My advice is not to pussy-foot around on this. Take the heads off and see what the heck happened. With my advice and a couple of bucks you can get a cup of coffee.

Rev

woodsnake · 05-31-2006, 10:29 PM

Well, just to keep interested parties up to date: I did a compression test, and #8 is about 30 lbs less than #7. So it seems that I got very lucky and only have a mildly bent valve. I now am trying to find some garage space to pull the heads off and help keep everything as clean as possible.....
I will update when I have more info, thanks to all here who have tried to steer another Ford back onto the road instead of the scrap yard!!)

Dark Knight · 06-05-2006, 06:49 AM

Did you run the test on all the cylinders? Might want to. Hopefully it didnt damage the piston to much...

woodsnake · 06-10-2006, 06:55 PM

Update!
Well, I pulled the head, and there is not a hole in the top of the piston. There is a definate area of contact, but no visible cracks. So, Monday it's back to the machine shop to see what all is going on.......

woodsnake · 06-14-2006, 09:39 PM

Upon further inspection, ther is or was, no direct between piston and anything. The first impression was wrong. Something only happened to the valve itself, or the valve spring decided to bind up. I can pick up the head on Friday, it should be running again Friday after noon. :-)

Dark Knight · 06-16-2006, 09:00 AM

Cool, did they change the springs or retainers? Valve guides might have been to tight too..

woodsnake · 06-16-2006, 06:40 PM

Well, the head is back. The only thing we determined that could have caused a valve to stick was the quality and quantity of bad gasoline on a brand new motor. Since there is no evedence of any contact between the piston and the valve, this is what I'm going to work with. I know everybody says that it is very unlikely, and I certainly agree. But what else is there? If there is no contact, then what is wrong? Look in my '68 part 2' pictures, and keep in mind that this engine only has two to three hours run time.....

05-24-2006, 06:31 PM	#1
Rev Registered Member Join Date: Nov 1998 Location: Houston, Tx. Posts: 3,887	Re: dual pattern cams I hate to say it but pulling the heads to check for valve train- piston damage is not premature at all from what I've read so far. Something is badly wrong here. I suspect valves kissing the pistons for some reason or coil bind as previously suggested. My advice is not to pussy-foot around on this. Take the heads off and see what the heck happened. With my advice and a couple of bucks you can get a cup of coffee. Rev __________________ '66 Coupe, 306, 350-375 HP, C-4, 13.07 e.t., 104.8 mph, 1/4 mi. O.B.C. #2 '66 coupe

05-31-2006, 10:29 PM	#2
woodsnake woodsnake Join Date: May 2006 Location: Nampa, Id Posts: 17	Re: dual pattern cams Well, just to keep interested parties up to date: I did a compression test, and #8 is about 30 lbs less than #7. So it seems that I got very lucky and only have a mildly bent valve. I now am trying to find some garage space to pull the heads off and help keep everything as clean as possible..... I will update when I have more info, thanks to all here who have tried to steer another Ford back onto the road instead of the scrap yard!!) __________________ Disclaimer!! All info provided by the woodsnake is free, and worth what it costs!! Use with caution What can I say, I like Cougars... " yer darn right wow " http://woodsnake4462838.tripod.com/68_part_2 http://woodsnake4462838.tripod.com/cougars_at_rest/

06-05-2006, 06:49 AM	#3
Dark Knight Registered Member Join Date: Oct 1998 Location: Az Posts: 854	Re: dual pattern cams Did you run the test on all the cylinders? Might want to. Hopefully it didnt damage the piston to much... __________________ 84 convt,roller 302,AFR's, performer 3.55's, underdrives BBK shorties stock cam, 1.7's 13.58@102.84 and a '68 stang .. project 8 sec street car... 557 big block + N20 :-) http://members.cox.net/darkknight302/68nwrear.jpg

06-10-2006, 06:55 PM	#4
woodsnake woodsnake Join Date: May 2006 Location: Nampa, Id Posts: 17	Re: dual pattern cams Update! Well, I pulled the head, and there is not a hole in the top of the piston. There is a definate area of contact, but no visible cracks. So, Monday it's back to the machine shop to see what all is going on....... __________________ Disclaimer!! All info provided by the woodsnake is free, and worth what it costs!! Use with caution What can I say, I like Cougars... " yer darn right wow " http://woodsnake4462838.tripod.com/68_part_2 http://woodsnake4462838.tripod.com/cougars_at_rest/

06-14-2006, 09:39 PM	#5
woodsnake woodsnake Join Date: May 2006 Location: Nampa, Id Posts: 17	Re: dual pattern cams Upon further inspection, ther is or was, no direct between piston and anything. The first impression was wrong. Something only happened to the valve itself, or the valve spring decided to bind up. I can pick up the head on Friday, it should be running again Friday after noon. :-) __________________ Disclaimer!! All info provided by the woodsnake is free, and worth what it costs!! Use with caution What can I say, I like Cougars... " yer darn right wow " http://woodsnake4462838.tripod.com/68_part_2 http://woodsnake4462838.tripod.com/cougars_at_rest/

06-16-2006, 09:00 AM	#6
Dark Knight Registered Member Join Date: Oct 1998 Location: Az Posts: 854	Re: dual pattern cams Cool, did they change the springs or retainers? Valve guides might have been to tight too.. __________________ 84 convt,roller 302,AFR's, performer 3.55's, underdrives BBK shorties stock cam, 1.7's 13.58@102.84 and a '68 stang .. project 8 sec street car... 557 big block + N20 :-) http://members.cox.net/darkknight302/68nwrear.jpg

06-16-2006, 06:40 PM	#7
woodsnake woodsnake Join Date: May 2006 Location: Nampa, Id Posts: 17	Re: dual pattern cams Well, the head is back. The only thing we determined that could have caused a valve to stick was the quality and quantity of bad gasoline on a brand new motor. Since there is no evedence of any contact between the piston and the valve, this is what I'm going to work with. I know everybody says that it is very unlikely, and I certainly agree. But what else is there? If there is no contact, then what is wrong? Look in my '68 part 2' pictures, and keep in mind that this engine only has two to three hours run time..... __________________ Disclaimer!! All info provided by the woodsnake is free, and worth what it costs!! Use with caution What can I say, I like Cougars... " yer darn right wow " http://woodsnake4462838.tripod.com/68_part_2 http://woodsnake4462838.tripod.com/cougars_at_rest/

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