MrBlah Posted April 21, 2012 Share Posted April 21, 2012 (edited) Ok, so, have a problem. Here's how it went down: Start driving up the hill, hear a rattling noise from engine compartment, it gets worse as you go up to higher RPM(significantly above 2500RPM). It dies while still driving. Once I got it home, it was hard pressed to turn over with power from my Jeep, but it did go. starts again. But the rattling persists, it is cyclic(comes in and goes out every 3 seconds or so for about 3 seconds), it comes somewhere from around the #4 or 5 cylinder, but almost sounds like it originates from the exhaust manifold. It sounds A LOT like tapping on the underside of the valve cover when it occurs, but I've taken the valve cover off to inspect while the car was running and the location isn't quite right. N42 Block, P90 Heads, equal length long tube headers, stock intake. Any insights on the cause or root of the problem would be greatly appreciated. Edited April 21, 2012 by MrBlah Quote Link to comment Share on other sites More sharing options...
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