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It does sound similar to the engine mount vibration. How stiff is the guard? If you were getting contact between it and the engine/gearbox, I wondered if you might hear it more but, if it's pretty stiff, you may not I suppose.
Yeah I would 100% use threaded bosses if it was on a rally car...
Rivnuts are a bit of an odd choice for this application in my view. Fine for your use, but I think I would want something a bit more substantial on a rally car, as the sump guard is going to be on and off a lot, and it is so easy to damage them.
Anyway, that's nothing to do with this :ROFLMAO...
Car went in this week to have the manifold swapped out:
New and old:
Evidence of a previous repair:
It's better, but I do wonder if there is a bit of a blow from the join. Sounds a bit odd with the windows down. Will see how it goes for now. The guy at the garage said to just pop back...
Had the rear wheels balanced today:
Had the fronts done a couple of weeks ago as, ever since I fitted the Speedlines, there was a bad vibration through the steering. The fronts were 50g and 20g out and, while having them balanced improved it a lot, I could still feel some vibration through...
Welcome aboard!
I wouldn't go too mad as it's your first car, but a set of wheels and a subtle suspension drop would do wonders for it.
You could always fit the seats and door trims from a 172/182 as well, just to make the interior a bit sportier.
I wouldn't worry about miles anymore, unless you want a real collector's item. They're all 15-20 years old now, so low mileage cars aren't going to common now.
It's all about condition.
I think there are probably too many unknowns there to definitively blame the venue. I would put that down to coincidence. With the used pumps, you simply don't know their history in terms of fluid changes, whether they've been run low on fluid, or whether they have been used on track.
I would...
What I'm trying to get at is that, by knowing the cause, it's easier to identify the workaround. Fitting a different pump may not be the solution.
Do they have cooling as standard? I would assume it's the fluid overheating and causing wear to the pump, so it may be enough to fit a new OEM pump...