M30b35 Oil pressure problem

jc971

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hello it is understood for the oil pump, not touch!
then do you find it normal that the piston is blocked in the pump of the b35 and free in that of the older b33?
Do you have a 3.5 pump on hand to confirm that the piston is blocked, or it is just stuck on mine?
 

jc971

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to adapt the b35 in the e9 I had to change the oil pan and fit a longer oil strainer
apparently it's an old version not great .. what do you think?
this is the bottom version that I have
a version without spring
 

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sfdon

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Going to shop this morning
I have boxes of pumps
show us a pic of the front where the gear is
 

sfdon

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Is that a b35 front with a b30/32 back?
did you relieve the shaft hole?
did the pump spin easily.
 

Belgiumbarry

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all that hassle for just.... a front sway bar ? which we ourselfs don't even use , better keep your wheels on the road. So i use the oem pan etc.. of the B35 in my E9.
Sure in rain you don't want that front swaybar .... never had a problem rallying it that way for years...... :)
 

jc971

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the oil pump of the m30b35 which has the piston stuck is really not beautiful inside
I cannot replace my current pump with this ..
 

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jc971

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my other pump is much cleaner inside but I can hear the spring moving around in the pump and I still don't know if it's normal or not
 

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jc971

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So I got motivated this evening I dismantled the oil pan, and the pump and its pick up we will be able to move on to the investigations
 

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bavarian

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My skyline motor did this and it did not end well. Move with caution. Use a a very thick oil if you start it from now on, this will bring up oil preassure and probably fix the light coming on however do not rely on that, forever. Is it possible that the gap for the main bearing is too big, did you plastiguaged before assembly, I really hope your oil gap isn’t too big but it is the worst possibility, I’d use a couple new oil pump shims and make sure everything is clean, grease free and flat before torquing it down, if you have multiple oil pumps you can maybe find a way to spin them with a drill at the same rpm and look for the oil pump with the most volume or biggest stream of oil, good luck clean the oil pump with fresh gas and lube the inside, if you think there’s a stuck piston that could be your problem .
 

jc971

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I have reassembled new bearings in standard dimension without having measured the crankshaft it is a risk .. because here in Guadeloupe I do not know anyone who rectifies the crankshaft, but it may be my problem
but I will try all the other options first before thinking about this one ..
I use 15w50
 

bavarian

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ouch try 20w-50 if its not very cold outside, unfortunately it could be that but like you said try and make sure your oil system is 100% first. you should look into "plastiguage" to double check oil gap.
 

sfdon

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No shims on b35 pump.
I will be in shop in 3 hrs.
I have pumps.
Best way to ship?
you need 20-50
 

jc971

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No shims on the b35 pump,
you mean the one between the pump and the pickup? Because i have one
then the best way to send to guadeloupe is by fedex
usps takes months to arrive here..
 

jc971

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ouch try 20w-50 if its not very cold outside, unfortunately it could be that but like you said try and make sure your oil system is 100% first. you should look into "plastiguage" to double check oil gap.
it is 30 degrees celcius all year round here I would switch to the 20w60 motul so but for the last oil change
can you explain plastiguage to me?
 

bavarian

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it is 30 degrees celcius all year round here I would switch to the 20w60 motul so but for the last oil change
can you explain plastiguage to me?
Yes obviously the right way to do it is with calipers but plastiguage is basically a little thin stick and you break off a piece and put the little piece of the stick on the crankshaft now you put on the top bearing and the main cap and you torque the main to torque specs, the stick you put in there will get squoshed and the wider it is, the more it got squoshed and the thinner the squosh the bigger the gap but they give you a chart that you can put up to the squoshed stick to see what gap you have so they will convert measure of squosh to very small oil gap numbers this stick I talk about looks like a piece of led from a led pen but it’s made of some gel like substance
 
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