reversion or manifold problem
#1
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reversion or manifold problem
hey guys,
I took my emi thunder manifolds off today after putting about 4.5 hours on my new 509ci engine,i took them off to remove my valve covers to readjust my valves.When i removed the left side manifold from the head,i noticed little water dopplets in each exhaust runner on the manifold and also a "clean"spot where it looks like pressured water was,i removed the other side and it was dry and carbon black looking,no problems.We tested the manifold for a internal leak and as of right now there is no signs of a leak,i did buy these used and i would say they are 5-6 years old,what is this?not reversion i hope because the other side is dry,cam specs are 606 and 617 lift,236 and 244 duration on a 110 intake center line,it is a custom grind from comp,please lets hear some input?
I took my emi thunder manifolds off today after putting about 4.5 hours on my new 509ci engine,i took them off to remove my valve covers to readjust my valves.When i removed the left side manifold from the head,i noticed little water dopplets in each exhaust runner on the manifold and also a "clean"spot where it looks like pressured water was,i removed the other side and it was dry and carbon black looking,no problems.We tested the manifold for a internal leak and as of right now there is no signs of a leak,i did buy these used and i would say they are 5-6 years old,what is this?not reversion i hope because the other side is dry,cam specs are 606 and 617 lift,236 and 244 duration on a 110 intake center line,it is a custom grind from comp,please lets hear some input?
#2
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Ok I will throw in my 2cents. If only one side has water drops I would look at the the manifold.
Reversion - how does it run at idle. Does it load up. It easy to tell. What color is the oil.
I had to change a 110 centerline cam once because of reversion.
Thats to bad you have to remove the exhaust to get at the valve covers. I am running IMCO manifolds with tall valve covers and can still take mine off without removing anything.
Reversion - how does it run at idle. Does it load up. It easy to tell. What color is the oil.
I had to change a 110 centerline cam once because of reversion.
Thats to bad you have to remove the exhaust to get at the valve covers. I am running IMCO manifolds with tall valve covers and can still take mine off without removing anything.
#3
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I have removed my valve covers before without removing the manafolds. You need a 1/4" swivel drive. One thing that helps is I installed studs instead of bolts. I have the EMI exhaust and have had great luck with them. Do you have long or short risers? Short risers with that cam will give you problems. I have the long risers, with that I had to remove the silent choice. Good luck with your problem.
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If it looks like a leak, and it is wet like a leak, it's a leak.
The clean area is the dead give away water turning to steam and it is steam cleaning your manifold at that spot.
The clean area is the dead give away water turning to steam and it is steam cleaning your manifold at that spot.
Last edited by B one; 06-23-2008 at 09:12 PM.
#5
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Although I have never seen it discussed here, I have had reversion issues when I have had valve train trouble allowing the valves to go out of adjustment (loose due to slightly bent pushrods from valve float). Corrected valve train trouble, and upon re-inspection, signs of reversion disappeared.