help - i screwed up on my v8 - advice needed |
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help - i screwed up on my v8 - advice needed |
jimkelly |
Feb 9 2016, 01:31 PM
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#1
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Delaware USA Group: Members Posts: 4,969 Joined: 5-August 04 From: Delaware, USA Member No.: 2,460 Region Association: MidAtlantic Region |
last week we determined that some of my oil leak problem was 4 bolts holding my carb intake to the heads, so we applied sealant and 3 stopped leaking. on Saturday I thought i'd address the last one that did not stop leaking, so not only did I add sealant to it again, I decided to use a longer bolt because the other 3 were longer. I used a 1.5" bolt but it turns out the other were probably 1.25", the max that should be used. so anyway, monday go for a drive but power is weird, I figured it had to do with engine being cold and I just changed the fuel filter and thought maybe there was some starving going on, but 30 minutes later I decided to go back home and figure out what was wrong. anyway, yesterday I pull the valve cover off to find a cracked valve rod that I retrieved from the head with a magnet on a stick but I had to remove the intake to put the lifter back in the head. anyway, it is all back together but it revs ok in neutral but under load it is either valves or knocking. what you think? anyway, why does a guy with so little mechanical prowess own a 914, who the hell knows. i'd like to think the noise is due mostly to timing cause I of course had to pull the distributor. and I never put a tdc mark on my flywheel or crank balancer, need to, asap. I first thought it was vacuum advance problem but vacuum is pulling thru hose.
https://www.youtube.com/watch?v=tfKEa1-W0XQ video is being loaded, pls check back and comment. pls pls. Attached thumbnail(s) Attached image(s) |
veekry9 |
Feb 9 2016, 07:33 PM
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#2
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OldMember Group: Retired Members Posts: 3,068 Joined: 17-June 13 From: TO Member No.: 16,025 Region Association: Canada |
The truth is the engine,is a write off,total rebuild. (IMG:style_emoticons/default/happy11.gif) Many questions. Because you have metal in your oil. Murphy lives inside engines. Did you compare the new pushrod's length with the others? Did you remove any metal from the pushrod's guide hole? Did you inspect(microscope)the flying lifter? Did you inspect the valley for metal fragments? How badly damaged was the stamped rocker arm? Any nicks on the valve tip? Appears to be a bone stock iron head,with an ally intake and headers,and I presume,a stock cam. Factory valves and guides? What head castings are they,compression and squish? How many hours old is the cam chain and sprockets? Any indications of knock or ping under load? What are the compression and leakdown readings? Have you had the valve seats scoped? Have you ever pulled the pan to check rod and crank clearances? What is your oil pressure and temperature,idling while hot? Any sign of scoring in the bores? Have you pulled a piston to determine running clearances and wear? Many questions,for a sbc lump,the beauty is the price to fun ratio. https://www.google.ca/webhp?sourceid=chrome...-8#q=find%20tdc https://www.google.ca/webhp?sourceid=chrome...+aluminum+heads https://www.google.ca/webhp?sourceid=chrome...t%20chevy%20350 The truth is we have to make mistakes to learn "do not do that again",at times,that can be very costly. (IMG:style_emoticons/default/dry.gif) / |
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