Date: Wed, 31 Dec 2003 16:53:45 -0000
From: "Mike P" <>
Subject: Re: Couple of C900 Questions..

"Grunff" <> wrote in message > Mike P wrote: > > > 1. How easy is it to change the Drivers side electric mirror assembly? > > Someone arsehole has smashed it to pieces - the entire thing, not just the > > glass. These are the sort of jos that look easy to me, then I make something > > worse. > > Pretty easy - you remove the plastic trim on the inside, and > you'll see the mounting screws. > > > > 2. Tappety noise when under load. This noise happened after a 2 hour high > > speed run (90+mph) It now "taps" a lot on starting from cold, and quietens > > down when warm. It only happens when the engine is under load and doesn't > > happen at tickover when warm. There's no apparent loss of performance - > > well, I put one of Matt's APC units on a couple of days ago and it works a > > treat.. > > Hmm... > The most common noise that comes in under load is pinking. There > are lots of reasons why an engine pinks - incorrect timing, weak > mixture, incorrect plugs/sooted plugs to name but a few. > > First thing I'd do would be to pull the plugs and inspect them > carefully. What do they look like? Are they all the same? > Thanks for the suggestions Grunff.. Plugs - Done that this morning before I set off back down. They are all about 300 miles old NGK BCP7EV plugs, new leads. The noise *doesn't* appear to be pinking, it's a metallic noise, that increases with engine speed. Never gets louder or softer. It's not dependent on throttle position. It's NOTHING like the noise I presumed to be pinking - harder knocking noise, accompanied by instant boost cut when my intercooler>throttle body pipe blew off when I forgot to tighten a clip. It's not the noise I get if I try to accelerate at 20mph in 5th either.. It is definitely coming from the top end of the engine, but I can't drive far enough along the car park leaning out the window with the hood open to work out exactly where from...:-) It started after a long motorway journey, before the APC units were swapped. There has been no change in it's volume or frequency. The replacement APC unit appears to work as it should. I've got more power and torque, it boosts into the red and cuts the boost when it starts to pink. It's not a massive problem if it is a camshaft or knackered tappet. I plan to either take this motor out and rebuild it, or drop in a lower mileage motor in the spring anyway.Mine needs a timing chain, so it's engine out anyways. I'd just like to know, because it sounds like I'm driving around in a knackered old Ford at the moment... :-) Mike

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