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226  Camaro Research Group Discussion / General Discussion / Re: Bad Luck is Better Than No Luck; Right? on: April 26, 2014, 10:22:25 PM
Looks like the pushrods were clearanced for more oil delivery, eh ?

Hate you had to do that, after working so long to finish it up. At least the firewall and long block look like they parted cleanly - no marks -

Guess the pushrod ends are in the pan - had to come out anyway you look at it.

Regards -
 

It definitely is a handful pulling a big block by yourself.  I almost had it out and then had to drop it back down to close the garage door to get the engine & trans high enough to come out.  lol
I found a couple pieces in the valley of the heads and also had a tip fall out of the header... Shocked Angry
227  Camaro Research Group Discussion / General Discussion / Re: Bad Luck is Better Than No Luck; Right? on: April 26, 2014, 10:08:45 PM
More detail pics of the pushrods.








After working some OT today; I was able to pull the engine out tonight.  Tomorrow I will be able to tear it down and see where the problem is hiding..







228  Camaro Research Group Discussion / General Discussion / Re: Bad Luck is Better Than No Luck; Right? on: April 23, 2014, 09:11:33 AM
sorry to hear about it

also check your rocker arm ratio

for example , if the engine was set up for 1.7s then someone installed 1.8s  
it could have an interference problem


Thanks.  1.72 ratio

Again Idk if the pistons were made for open chamber or not.  I didnt build it.  Ill snap a few pics later on when I get off work.  I really havent had any time to look over anything at this point.  Just took a few minutes yesterday morning to pull all the pushrods out.  If I have time this week I should be able to get a better idea of the problem.

As for the ratio its stock 1.72
229  Camaro Research Group Discussion / Decoding/Numbers / Re: How many T-1 in database? on: April 23, 2014, 08:34:57 AM
Capri Cream white top
230  Camaro Research Group Discussion / General Discussion / Re: Need help with 1967 RS headlights on: April 22, 2014, 04:17:07 PM
Yes the purple and black pigtail.  If you can not get it to power up by either way then the motor is bad.
231  Camaro Research Group Discussion / General Discussion / Re: Bad Luck is Better Than No Luck; Right? on: April 22, 2014, 09:20:33 AM
Yeah knowing how I am; Ill be pulling the motor and doing a complete teardown, inspection & rebuild.  Sucks but I will feel better about it knowing I built the engine...

Also, when I was using the Snap-on bore scope I noticed metallic on the tops of pistons (which is expected) along with scoring on the cylinder wall on at least one cylinder.  Needless to say I could chew nails at this point.  But I am already running combos through my head on how I want to build it.
232  Camaro Research Group Discussion / General Discussion / Re: Bad Luck is Better Than No Luck; Right? on: April 21, 2014, 08:56:02 PM
Reason I say I am speechless is that this was over looked (piston to valve clearance) in the build process..
233  Camaro Research Group Discussion / General Discussion / Re: Bad Luck is Better Than No Luck; Right? on: April 21, 2014, 08:17:34 PM
Whelp after looking into it 5 of the exhaust pushrods were bent & one intake.  That's checking them on the work bench. I'll know 100% tomorrow when I get to work & roll them on the granite slab.  Further investigation has concluded that the exhaust valves are hitting the pistons.  Later in the week I'll do a leak down & go from there.  I'm speechless at this point.
234  Camaro Research Group Discussion / General Discussion / Re: Bad Luck is Better Than No Luck; Right? on: April 21, 2014, 05:11:38 PM
Lol
235  Camaro Research Group Discussion / General Discussion / Re: Bad Luck is Better Than No Luck; Right? on: April 21, 2014, 04:42:12 PM
It was technically on the road..  lol  although it was only for a few minutes..   Roll Eyes Sad
236  Camaro Research Group Discussion / General Discussion / Re: Bad Luck is Better Than No Luck; Right? on: April 21, 2014, 04:32:52 PM
Again Idk if the pistons were made for open chamber or not.  I didnt build it.  Ill snap a few pics later on when I get off work.  I really havent had any time to look over anything at this point.  Just took a few minutes yesterday morning to pull all the pushrods out.  If I have time this week I should be able to get a better idea of the problem.

As for the ratio its stock 1.72
237  Camaro Research Group Discussion / General Discussion / Re: Bad Luck is Better Than No Luck; Right? on: April 21, 2014, 04:11:01 PM
They are 11 to 1 TRW pistons and its oval port open chamber heads.  As for actual compression I am guessing 10 or 10.5 to 1 with the heads.  I dont think valves have hit the pistons (might be wrong).  Ill be doing a leak down test later in the week along with a compression test just to be on the safe side.  Most RPM this motor has seen is 5K.  At least with me.
238  Camaro Research Group Discussion / General Discussion / Re: Bad Luck is Better Than No Luck; Right? on: April 21, 2014, 01:57:17 PM
Ever wipe a cam out ? same symptoms---strange only 4 of ehaust push rods. Checking your timing gear set.


400 68 GTO I had---nylon timing gear set ,severe carb back fire ,guess what??

 one of my SBC's severe carb back fire---cam wiped out ,a few bent push rods.

Both spit up raw fuel through the carb. Both I shut down ASAP with minimal damage. On the chevy, dropped the pan checking for shrapnal, minimal ,most caught by the filter ,changed the cam push rods etc ,ran it hard after that for about 10 years. Blocks now at home in the Anglia ,rotating assembly boxed up.

Really what else could it be but bad cam timing ? Only the upward force of the piston would be strong enough to bind those pushrods and big blocks are ,er ,BIG. Let us know--steve.

Already checked timing.  Cam lobe was the first thought until I saw the pushrods.  After finding 4 I doubt its the cam.  One I would have thought that but not 4..  But I have been wrong before..
239  Camaro Research Group Discussion / General Discussion / Re: Bad Luck is Better Than No Luck; Right? on: April 21, 2014, 01:54:27 PM
I had a feeling it was a BB being they have two different size push-rods. You may also want to check for any bent rocker studs.
I recommend to drop the pan to check for metal chips in case some are small enough to get pulled past the oil pump intake screen.

Mike

Ill see how it goes.  No plan of dropping anything at this point.  If I do drop the pan the engine will come out first.  


I had a feeling you were just venting as I think you are about as savvy a Chev guy as they come. I also know you already had thought of all I suggested too. Some of those P-Rods have one end hardened for the guide plates. May have been installed wrong? I had a P-Rod shatter on the lifter end once. Usually, gasoline or geometry causes bent P-rods. I have also seen some Sm. Blocks P-rods go through the rocker. Are the P-Rods 5/16, 3/8 or 7/16 in.?


3/8" and case hardened..
240  Camaro Research Group Discussion / General Discussion / Re: Bad Luck is Better Than No Luck; Right? on: April 21, 2014, 01:18:52 PM
Already thought of all that as well.  Just irritated and wanting to vent.  lol  I will figure it out just not what I wanted to do on a fresh (8 year old built) engine.. Roll Eyes

Engine was broken in back then and had sat unstarted since 2006.  I would turn it over from time to time by hand.  Engine sounded fine when I fired it for the first time since and just a few weeks ago I noticed rocker noise and adjusted them then.  Now I know why there was noise the first time.  Its just odd it was only the exhaust and no intakes...

FYI the pushrods that were pulled out are 1010 mild steel.  Comp Magnum roller tip rocker.  Cam I am guessing by ear is either a .520 or .570ish lift cam (I am leaning to the more .570ish lift due to the radical sound).  Hyd flat tappet (that I do know).

Odd thing is the lifter side of the pushrod is fine.  Just the rocker side is damaged.  Almost like it was starving for oil.  Right now I want to make sure the geometry is correct and look for coil bind (which I do not think it has).

As far as runtime...  Other than break-in it has run maybe an hour if that.


No smoke and plugs look good except for the ones that had the issue which were a little fat but nothing major.
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