3.5 rebuild help

[MJG]

If the car is pre-93, then you don't need a cat no. Mine have never had cats, e34 or e28 engine neither of them. Might explain my slight rich running but generally was sweet.

[Demlotcrew]

I think Theos 335 only made 190bhp so they do need rebuilding if the miles are high.
If I was to rebuild one I would go for a cam and total seal piston rings.

Was about to post this up also.

And from what i understand his was a 'good' (it came from jonb ) engine?

[whipsey]

cars a k reg tourer

[stonesie]

No need for a cat then

[whipsey]

woohoo

[whipsey]

he he let the fun begin

[ed325i]

Its a e28 lump then.
Higher compression then the later engines I think.

[whipsey]

yeah e28 lump so far thats all i've got just started stripping it down gonna clean up and replace what needs replacing

[Speedtouch]

Is that a 3.2 or a 3.5? Is there a way of finding out which model of car the engine was out of from the engine number?

Cheers,

[whipsey]

this might clear it up lol


i wanted to replace the injecctors with some larger one's if possible and was wondering if i should replace he cam chain as well?

[whipsey]

anyone?

[Speedtouch]

They're supposedly good for the life of the engine. I'd try and lift it off the sprockets; any appreciable lift in the mid-section of the cog would indicate wear.

[whipsey]

gotta be honest it all looks to be in good condition even thecams look like they have very little wear if theres any one local that wants to have a look for me feel free to offer lol

[DRIFTBOY]

I wouldn't waste time and money on bigger injectors unless you plan 250+ bhp.

As said, try and 'lift up' the timing chain to check for wear.
If it is worn replace the sprockets, guide rail and tensioner as well.

Martin.

[Speedtouch]

Is it OK to use the hex-head head bolts on M30 engines (as pictured above), or should they be converted to Torx type?

[Theo]

I think Theos 335 only made 190bhp so they do need rebuilding if the miles are high.
If I was to rebuild one I would go for a cam and total seal piston rings.

Was about to post this up also.

And from what i understand his was a 'good' (it came from jonb ) engine?

It made 199bhp with what I later found to be a fcuked rotor arm and distributor cap, and a badly blowing exhaust. I was fairly happy, although it was sods law it didn't make that extra pony and reach the 200 mark. It did manage 222ft/lb of torque which feels good in a stripped out e30.

[Andy335Touring]

It made 199bhp with what I later found to be a fcuked rotor arm and distributor cap, and a badly blowing exhaust. I was fairly happy, although it was sods law it didn't make that extra pony and reach the 200 mark. It did manage 222ft/lb of torque which feels good in a stripped out e30.

You could have made a few more bhp with those faults fixed i guess, like you say it's sods law the faults didn't come to light til afterwards.

I'm glad i've ditched the dizzy cap/rotor arm on mine

[whipsey]

a quick question do i need to remove the dipstick tube from my engine block and seal the hole ?

[MJG]

Why would you need to do that? Where would your dipstick be then?

[whipsey]

not sure i thought u had to change the sump for an e34 one

[whipsey]

is this true help me please

[Andy335Touring]

Not sure about the dip stick but you do need the sump and the oil pump from an E34/2 M30 according to E30.de, not many E28 M30 powered 335's about ?

BTW, i've got a spare sump and pump if you struggle to find one.

[whipsey]

Not sure about the dip stick but you do need the sump and the oil pump from an E34/2 M30 according to E30.de, not many E28 M30 powered 335's about ?

BTW, i've got a spare sump and pump if you struggle to find one.

how much i was given the engine from by a mate i think they have about an extra 5bhp more then the e34 lumps not really sure though

[FormerMember]

M30B34 out of E28 has 10:1 CR and 218hp. No lambda, no cats.
M30B34/B35 out of E34 has 9:1 CR, cats, lambda, bigger inlet-valves and makes 211hp.

E28 had also M30B34 with cats, and different motronic-map, produced 184hp.

You need oilpan & -sump from E34, it has smaller "bulge" than E28 version. Just change the oilstick to one from M30 out of E34 and it's fine.

[Speedtouch]

Is there a way of differentiating a 218bhp M30B34 from a 211bhp M30B35 eg, from the engine number?

Cheers,

[Jhonno]

so a lata head on e28 lump would be a good move then?

[Andy335Touring]

Not sure about the dip stick but you do need the sump and the oil pump from an E34/2 M30 according to E30.de, not many E28 M30 powered 335's about ?

BTW, i've got a spare sump and pump if you struggle to find one.

how much i was given the engine from by a mate i think they have about an extra 5bhp more then the e34 lumps not really sure though

£80 quid for both posted or i'll knock a tenner off if you collect ?

[Andy335Touring]

Is there a way of differentiating a 218bhp M30B34 from a 211bhp M30B35 eg, from the engine number?

Cheers,

Not sure about the engine numbers but there are some external differences like the b34 having two support straps from the rocker cover to the inlet manifold, the b34 inlet ports are sort of a rounded off square and the b35 are kindney shaped.

[Andy335Touring]

so a lata head on e28 lump would be a good move then?

Not sure it's that simple tbh as the pistons have a different crown shape so i'm not sure the squish areas will match up ??

[Jhonno]

fai do's.. just a thought

[FormerMember]

so a lata head on e28 lump would be a good move then?

"lata" = "later" ?

M30B34 with and without cats were produced on the same time so there are no newer and older models (e28). Fitting E34 head to E28 block would maybe make some difference but basically it doesn't make sense.

M30B34 from E23/ E24 / E28



M30B34/B35 from E32 / E34

[whipsey]

looks like i've lost a couple of the yellow plastic bits when i removed the injectors how do i find them i have a feeling they may have found their way into the block

[Andy335Touring]

They are probobly just in the inlet manifold i'd have thought ?

Find a place that does injector cleaning and/or a Bosch specialist as they will sell you some new caps for pennies.

[whipsey]

i've got the manifold off will have a look do you know of any places that clean them etc may as well get the jets set correctly as well

[Andy335Touring]

Try google/yellow pages, theres plenty of places out there