Search found 1646 matches

by Mike W.
Sat Aug 17, 2019 8:06 pm
Forum: Tech Forum
Topic: Recreating 1979-81 528i emissions controls?
Replies: 4
Views: 35

Re: Recreating 1979-81 528i emissions controls?

I think you're good then, especially with electronic ignition as long as you don't have to pass smog. The old points and condenser didn't last long before needing replacement, on the m30 in my Bav I would barely make 5K miles. Same with plugs too. BMW went from madness, although it did have good pow...
by Mike W.
Sat Aug 17, 2019 12:04 pm
Forum: Tech Forum
Topic: Recreating 1979-81 528i emissions controls?
Replies: 4
Views: 35

Re: Recreating 1979-81 528i emissions controls?

Running a signal wire shouldn't be that difficult, but pre 79 ECUs don't have the capability of reading it or doing anything with it. So you would need a later ECU also. The distributor was different also and that was a big deal, electronic ignition for a hotter, more reliable spark, instead of vacu...
by Mike W.
Tue Jul 30, 2019 11:19 pm
Forum: Tech Forum
Topic: 1979 e12 Radiator
Replies: 5
Views: 171

Re: 1979 e12 Radiator

My limited experience with recored radiators is they are as good, if not better than originals. However, if you're is leaking from the tank or seams it can probably just be soldered up and repaired as long as it's not leaking from the core or running hot.
by Mike W.
Tue Jul 30, 2019 4:32 pm
Forum: Tech Forum
Topic: 1979 e12 Radiator
Replies: 5
Views: 171

Re: 1979 e12 Radiator

Looks like they are getting hard to find, but plastic tanks? I don't think I've seen an E12 radiator with plastic tanks. Might it be an E28 radiator? I, and many have done that conversion and they're not so hard to find. Ebay appears to have some aluminum ones for sale, not cheap but not crazy expen...
by Mike W.
Sat Jul 27, 2019 2:40 pm
Forum: Tech Forum
Topic: Test '79 aux air valve
Replies: 3
Views: 82

Re: Test '79 aux air valve

I misunderstood your question at first. I think you can bench test them, or at least stove top test them, just put them in a pan and heat it to boiling, you should see movement.
by Mike W.
Fri Jul 26, 2019 7:32 pm
Forum: Tech Forum
Topic: Test '79 aux air valve
Replies: 3
Views: 82

Re: Test '79 aux air valve

Which aux air valve, the A/C one or the warm up? The former is a simple solenoid valve, only accuated when the A/C compressor is on, the latter is thermal and closes as the coolant warms up. External test would be to disconnect the air side, block off both sides to prevent a vacuum leak and see if t...
by Mike W.
Fri Jul 26, 2019 11:57 am
Forum: Tech Forum
Topic: No Crank, No Start
Replies: 1
Views: 52

Re: No Crank, No Start

7.5V, somethings wrong. Either low battery or measurement or something. I'd just out a hot wire to the starter start lead before I'd do a starter just to make sure. Starters usually die slowly not all at once. Try giving the starter a bang too, I've seen that work on more than one make of car.
by Mike W.
Thu Jul 25, 2019 12:01 pm
Forum: Tech Forum
Topic: cylinder head swap
Replies: 20
Views: 316

Re: cylinder head swap

Later injectors can be used in early manifolds. IIRC you can put the small and large seals on the later ones by changing the pintle cap but will have to use the late fuel rail and rig up mounting brackets for it. But the clips hold the injectors in place anyway and even at 3 bar the amount of pressu...
by Mike W.
Tue Jul 23, 2019 10:17 pm
Forum: Tech Forum
Topic: Output Shaft Removal?
Replies: 4
Views: 109

Re: Output Shaft Removal?

Nope, see to some of us rust is just a theoretical concept. :D

I have been known to resort to a Vice Grips on the head along with the socket at yards but I'm not sure that would have helped.
by Mike W.
Sun Jul 21, 2019 2:56 pm
Forum: Tech Forum
Topic: cylinder head swap
Replies: 20
Views: 316

Re: cylinder head swap

I don't think you would need to modify the rotor, but you would need it to be timed "about right" Motronic curves are more complex than a conventional distributor, but as long as it's close I think it would be ok. I would retain the centrifugal advance in the distributor which should very roughly co...
by Mike W.
Sun Jul 21, 2019 12:30 pm
Forum: Tech Forum
Topic: cylinder head swap
Replies: 20
Views: 316

Re: cylinder head swap

Motronic will work with an older head, but needs a motronic cam which can be installed in an older head. The nose of the cam where the adapter for the distributor rotor attaches is different. Ironically there is an adapter where you can use a motronic cam for a conventional distributor, but not the ...
by Mike W.
Sat Jul 20, 2019 12:21 am
Forum: Tech Forum
Topic: Differential or pinion and ring gear
Replies: 8
Views: 187

Re: Differential or pinion and ring gear

I had another thought. I think diff's have magnetic drain plugs. I know trannys do, but I'm not sure about diffs. But pull the drain plug. If it's magnetic, it will have metal particles attached to it, even if it's perfect. But if it's a bearing, there won't be a whole lot. If it's the R and P I sus...
by Mike W.
Thu Jul 18, 2019 12:52 am
Forum: Tech Forum
Topic: Differential or pinion and ring gear
Replies: 8
Views: 187

Re: Differential or pinion and ring gear

No spare diff's here. Never been into one but I've heard it's usually the bearings, not the R and P that's the problem, so I'd consider new bearings instead of the typical 300K replacement. Again, I've heard, not done, but I've heard it's possible to mark the nut and shaft, then tighten just to that...
by Mike W.
Tue Jul 16, 2019 11:53 pm
Forum: Tech Forum
Topic: cylinder head swap
Replies: 20
Views: 316

Re: cylinder head swap

Measured my pianos: 6mm tall. Looks like I lucked into higher compression. Sweet! EA38B08F-2F27-426F-BB39-5574EA738F7A.jpeg OH wow, thats awesome, Mike whats the HP difference in those engines? Not a ton, euro 528i was 177HP, US 169HP. Still a little more fun. On valve guides, in my experience the ...
by Mike W.
Tue Jul 16, 2019 11:49 pm
Forum: Tech Forum
Topic: Exhaust: 633CSi v 528i
Replies: 4
Views: 122

Re: Exhaust: 633CSi v 528i

79-81 528i and 80-81 633CSi used identical exhausts. Especially if you have a 2.8 I don't think the 2 unconnected manifolds as used on earlier and later M30s are going to get you anything performance wise. IMO the only downside to the one manifold bolted to the other manifold with a single downpipe ...