Edelbrock Cam Issues - Page 2 - JeepForum.com

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post #16 of 26 Old 05-26-2011, 12:33 PM
chris142
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The 12* base timing is just a starting point. Don't take it for granted. Play with advancing it up.

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post #17 of 26 Old 05-26-2011, 09:39 PM Thread Starter
Blacky15
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I played with the timing with rotating the distributor and still consitant popping. My father-in-law mentioned pulling one plug wire off and then start it up and check for popping. I am thinking it is a hung lifter on one of the cylinders. Has anyone had a hung lifter that caused something like this? I have checked the gas, rotor, cap, plugs & wires.
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post #18 of 26 Old 05-27-2011, 06:27 AM
muddr1
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If your cam was 180 out, I would check for bent valves. The valves opening when the piston is on its way up is not a good thing.

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post #19 of 26 Old 05-27-2011, 09:40 AM
baldfatdad
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Check the firing order to see if you have plug wires on correct. Check dist cap too.
The do compression check to check you didn't bend a valve.
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post #20 of 26 Old 05-27-2011, 01:21 PM
herbiehind
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Quote:
Originally Posted by muddr1 View Post
if your cam was 180 out, i would check for bent valves. The valves opening when the piston is on its way up is not a good thing.
+1
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post #21 of 26 Old 05-27-2011, 07:42 PM Thread Starter
Blacky15
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Went through and pulled a valve cover and found a loose lifter. I went through and retorqued them all to 19lbs. One still would not tighten up so I pulled the intake and found for some reason the lifter vacuumed locked and it wore the cam lobe down on the exhaust valve. So the exhaust was coming back up through the intake and carb. Long story short I called Summit and they reviewed the instructions from Edelbrock and there is no mention of using a ZINC addition to the breakin oil. They are going to be exchange the cam and lifters as Zinc is needed per Summits Techs.

Thanks everyone for the help, this site is amazing!!!
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post #22 of 26 Old 05-27-2011, 08:18 PM
chris142
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You didn't run a break in addative with the new cam? Did you run it @ 2000 rpm for 20-30 minutes?

http://www.redlineoil.com/product.aspx?pid=121&pcid=1

http://www.royalpurple.com/breakin-oil.html
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post #23 of 26 Old 05-27-2011, 10:33 PM Thread Starter
Blacky15
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I was following the Edelbrock install sheet line for line and no where in there does it state to use a break in addative. They state to not even soak the lifters in oil. I did run it for 25 mins at a 2200 RPMs. Not sure what happened, but I will be using an break in oil when the new one comes.
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post #24 of 26 Old 05-28-2011, 12:58 AM
chris142
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I guess they assumed that everybody got the memo about extra antiwear addatives with a new cam and lifters. Sorry to hear about your disaster.

How many lobes did it eat?Did you put any grease on the cam and lifters? I've had good luck with the Stalube assembly lube.

http://www.amazon.com/dp/B000M8RYUE/ref=asc_df_B000M8RYUE1562453?smid=ATVPDKIKX0DER&tag=dealt414113-20&linkCode=asn&creative=395093&creativeASIN=B000M8RYUE
The bad news is that all that hardened metal is now being circulated around in your engine. The filter wont catch it all especially when it's in bypass mode.

You really need to pull the engine apart to clean and put new bearings in it now.

I used the Redline stuff and Shell SAE30 diesel oil on my last engine and it did fine. I broke it in for 30 mins. Drove it home and then back to work the next day. Then Changed the oil and filter.
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post #25 of 26 Old 06-14-2011, 06:50 PM
yahwhy
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fail
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post #26 of 26 Old 06-15-2011, 05:50 AM
JHW12084
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Quote:
Originally Posted by Blacky15 View Post
Went through and pulled a valve cover and found a loose lifter. I went through and retorqued them all to 19lbs. One still would not tighten up so I pulled the intake and found for some reason the lifter vacuumed locked and it wore the cam lobe down on the exhaust valve. So the exhaust was coming back up through the intake and carb. Long story short I called Summit and they reviewed the instructions from Edelbrock and there is no mention of using a ZINC addition to the breakin oil. They are going to be exchange the cam and lifters as Zinc is needed per Summits Techs.

Thanks everyone for the help, this site is amazing!!!
unfortunately, your the second person i know of with issues with an edelbrock cam. a friend of mine had the same disaster with a bbc he built for his show car. he called edelbrock and told him thier instruction are good for toilet paper as well as their cams. now as for break in oil, an old guy that i work with uses valvolines. and after every season of drag racing, when he rips his engine apart and reassembles it, whether theres new parts or not, fires it up with the break in oil for the first time for 20 minutes. then changes the oil.
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