New Friend Questions. '92,300D,2.5TD

[Phillytwotank]

In effort to smash through my learning curve on the w124 chassis and the OM 602 engine I have a few questions i wanna throw out there for y'all. Please chime in with any Answers, Advice

New to me 1992 300D 2.5 turbo diesel has been pretty good for the first couple of weeks on the road making my 96 mile daily commute. 27 MPG first full tank of fuel (B99). All the most important things are working as they should. Cruise Control, Climate Control, Brakes, Lights, Transmission shifts good, Horn.. all that goodie stuff.

Just a couple of things that are bugging me.

Radio: I will be replacing the original radio as soon as i can rangle up some funding. until then, the original radio works sometimes. When it does it everything sounds fine. When it doesn't i will power on but the display will remain blank and it will flash " E 2" then go off again. Is there an easy fix for this to get me by for a bit until i can get a new head unit in there??

Turbo: I've not yet had a chance to Tee in a proper boost gauge but my seat of pants boost gauge tells my that something is up with the turbo. The damnedest thing... the turbo seems fine until the engine gets up to temp. When it hit about 80c the turbo seems to go away.

I've read up un the pressure waste gate swap and i have the part in the garage ready to do the swap. I did temporarily straight pipe vacuum to the waste gate and it would peel your eyes back with acceleration. So, i feel pretty confident that the problem is somewhere there on the control side of things.

My question is...has anyone ever experienced anything like that? will the pressure waste gate swap solve that problem as well?

Lifter Noise?: Very first thing i did was change the oil to rotella synthetic. That along with the new injectors from Greazzer and she's 85% quieter than before. Still experiencing some Clacka Clacka. Now i know that some of that is to be expected with these but compared to what i'm used to with the '78, that sounds like somebody's hemming up a pair of pants up there, i don't think that i can settle for less than the quietest it can be.

Is there a definitive way to check the lifters?

I'm planning on opening up the valve cover tomorrow to check the chain and to check the lifters at the same time.

I dont want to make a too long post so i'll stop here for now.

Thanks all