I bit the bullet, now it's time to restore it! M52B28 – cold idle/hesitation and strange noise
▲ 17 r/BMWE36

I bit the bullet, now it's time to restore it! M52B28 – cold idle/hesitation and strange noise

Hi everyone,

I recently bought a 1996 E36 328i Coupé with the M52B28 and around 103k km (theoretical mileage, haha).

I’m trying to diagnose a couple of engine-related issues and would love to hear from other M52 owners who have experienced something similar.

When the engine is cold, it has some hesitation/bucking at low RPM. The idle is also not completely smooth, and the RPM seems to jump rather than increase smoothly. This gets progressively better as the engine warms up and is basically gone once it reaches around 90°C.

The car was scanned during the pre-purchase inspection, both before and after the road test, and no relevant fault codes were found.

There is also a noise when starting the engine that sounds somewhat like a bearing or a belt squealing/rattling. It gets louder as RPM increases, especially when accelerating under load. I’m wondering whether this could be related to the accessory belt system, tensioner, idler pulley, alternator, water pump, etc.

The inspection also found some oil seepage around the upper part of the engine, apparently around the VANOS hose area. I haven’t done any repairs related to the cold-running issue yet.

Has anyone experienced this combination of symptoms on an M52B28?

Any advice on where to start diagnosing would be greatly appreciated. Thanks!

u/mateusblr — 2 days ago
▲ 126 r/BMWE36

Low mileage “barn find”, are these worth it?

I have found a 328 coupe manual with confirmed 25k miles on the clock for 26k usd, everything is original but the car has been sitting in a garage for years and years. , is it harder to put a car like this back to its peak or is it best to take a more used but probably modified unit? Since these cars are rare i would like to hear your thoughts.
Edit: the going price for a good manual e36 coupe in brazil is around 20-25k usd. A good m3 is around 42-45k USD. This one is on the higher side but within “normal” for us.

u/mateusblr — 2 months ago
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This is such an awesome result that I had to share!

u/mateusblr — 3 months ago
▲ 3 r/BMWE36

Maintenance history - Question

So, I'm looking to buy either a manual 323ti or a 328 coupe, this unit (1999, 119k Kms-74k miles) seems to be gorgeous at face value, but the owner shared that the latest maintenance was in 2023, the invoice included brake service, differential seals, cooling system flush, fluids, it had some shocks rebuilt and some general maintenance. However, from what he told me, the car has barely been driven since then and apparently hasn't even had an oil change in the last ~3 years. He focused more on cosmetic work recently (paint coating, interior detailing, etc.) and says he's now planning to inspect the cooling system again due to a recent water leak. Does this sound like a red flag to you guys or fairly normal for a low-mileage hobby car?

Ahh, price would be 20k USD, around 40% above our local market value here in Brazil

u/mateusblr — 3 months ago
▲ 127 r/BMWE36

How much more fragile are the aluminum M52s vs the iron M50s

Im looking to buy a 325i or a 328i coupe here in Brazil. We never had issues with excessive sulfur in our fuels. I am struggling to define if i go for the less powerfull but more robust m50 or the stronger but maybe more fragile 52s.

What is the tradeoff here and how do you feel about these two?

M3s are out of budget unfortunately.

u/mateusblr — 3 months ago
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u/mateusblr — 4 months ago
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Fala galera, to pensando muito em comprar uma primeira lasanha. To pensando numa BMW e36 manual. Alguem tem experiencia com a plataforma? Recomendam algum grupo ou canal pra saber mais detalhes de mecânica/peças dessa geração de carro?

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