Group A Uprated Oil Pump Spring

[flyfisher 6 2 Cars]

is it worth fitting a group a uprated oil pump spring to my alloy mi16 engine and how easy is it to fit many thanks

[Sinbad 16]

See my thread bud in maintenance section

 

http://forum.205gtidrivers.com/index.php?showtopic=133467&pid=1199972&st=0entry1199972

Edited October 12, 2011 by Sinbad

[flyfisher 6 2 Cars]

See my thread bud in maintenance section

 

http://forum.205gtidrivers.com/index.php?showtopic=133467&pid=1199972&st=0entry1199972

yeah have read it but it dont say if its worth doing

[Anthony 1,003]

It's worthwhile doing, but only really in conjunction with other oil control modifications - it's no use having a higher rated oil pressure spring if the oil control in the sump is insufficient to keep the oil pump pickup submerged in oil, as no oil at the pickup means no oil pressure no matter what spring you're running.

 

Petert's website explains all about Mi16 oil control and ways to go about improving it - clicky

 

Also, be wary of using the uprated pressure spring in an aftermarket pattern oil pump, as I've heard of people having issues such as far too high oil pressure - I assume that the tolerances or dimensions are different somewhere between some pattern pumps and the original OE unit.

[flyfisher 6 2 Cars]

many thanks for the advice

[Sinbad 16]

Just dont pay the £10 off ebay or anywhere else when you can buy them for £2.88 from Peugeot!!

[flyfisher 6 2 Cars]

yes e/bay price is a rip off are they easy to fit will they increase pressure at idle

[Sinbad 16]

Is the engine in or out?

Yes i got told they increase pressure at idle.

[Anthony 1,003]

Won't increase hot idle pressure at all - it just raises the pressure at which the pump will max out at with the revs up to approximately 6 bar.

 

Easy enough to fit, just a case of removing the sump and oil pump, and then splitting the oil pump to replace the spring. I personally wouldn't bother unless I already had to remove the sump for another reason though, particularly given what a pain XU sumps can be to seal properly again so that they don't leak.

[flyfisher 6 2 Cars]

what im after is to raise pressure at idle. a little bit if it wont do that then your right its not worth doing

[Anthony 1,003]

How low is your idle pressure, and have you actually checked/verified it with a accurate mechanical pressure gauge?

 

Generally speaking, so long as the oil pressure warning light doesn't come on, I wouldn't worry too much about idle pressure.

[flyfisher 6 2 Cars]

when engine is hot say 3000 rpm its just over 4 bar half way on gauge when hot at idle about 1000 rpm about 1/4 on gauge if car has been driven hard and oil temp is high could be a little lower

[welshpug 1,661]

sounds about right, only way you'll get it higher is to fit new bearings.

 

you say oil temps are getting high, how high?

[flyfisher 6 2 Cars]

not that high i mean if its a stinking hot day ect would there be any benifit nin fitting a oil cooler

[Anthony 1,003]

when engine is hot say 3000 rpm its just over 4 bar half way on gauge when hot at idle about 1000 rpm about 1/4 on gauge if car has been driven hard and oil temp is high could be a little lower

Sounds fine and perfectly normal to me.

 

not that high i mean if its a stinking hot day ect would there be any benifit nin fitting a oil cooler

For road use, almost certainly not - indeed, usually an oil cooler without a oil-stat will over-cool the oil, which isn't ideal in terms of protecting the engine.

 

My rough rule of thumb is that unless you're routinely getting the oil temperature gauge into the 2nd half of the gauge, there's no need for an oil cooler. In the mild UK climate, you're going to really struggle to do that on the road, short of a prolonged high-rev thrashing or sustained high motorway speeds, and even on track I find that the tyres and brakes are typically giving up by the time the oil is hot enough to be cause for concern (at least for 8v's anyway).

[flyfisher 6 2 Cars]

thanks guys for all the advice it puts my mind at rest

[Cameron 16]

Fitting a GTi6 oil pump and drive sprocket is surely the way to go isn't it? With the larger sprocket you get the pump spinning faster for a given rpm so at idle it will give a slightly higher oil pressure, and they have the stiffer "Group A" spring as standard.

 

The only other thing you can do it fill it with a higher viscosity "high mileage" oil, or rebuild the engine.

Edited October 13, 2011 by Cameron

[petert 589]

You need a larger crank drive sprocket then and chain to match.