Hi all,
I have a SW mechanical oil pressure gauge on my 20v 4age. I have noticed at around 60psi the needle hesitates/flickers between about 55-65 psi and then continues to climb as it should. Hard driving it flickers furiously around the 60ish? psi mark. I have an oil cooler, big wing gated sump and an accusump connected.
Any ideas, similar experience?
Thanks
No idea but will see if I can find anything.
A man who asks is a fool for five minutes. A man who never asks is a fool for life.
Ive not got a gauge on mine at the moment Steve but from your description it seemsOriginally Posted by mk1rally*
You mention you have a oil cooler on the car so are you still using VVT or has this been removed?
I only ask because if VVT is still been used and this relies on oil pressure to work effectively, surely the oil cooler is negating the efficiently of VVT.
Im thinking the flickering at 60psi under hard driving is where the VVT is been activated assuming you still use it.
Dave
RWD Escorts - Making the competition look like c**ts since 1968!
Didn't think of that. Yes still using the vvt - would an oil cooler make the difference to the pressure and effect the vvt then?
Cheers
that could explain it
Well I've been looking at 4age 20v oil pressure problems with coolers but 95% of what I've looked at have said that the oil pressure should remain constant although you will have a slightly lower oil pressure due to pressure losses in the cooler since the thermostat never completely closes. I'm working on the basis that the sandwich plate is a thermostatic one and reduces cooler flow when 'closed' so that the engine doesnt have an in rush of cold oil when the oil reaches the temp to 'open' the stat. This would mean that VVT could be a little sluggish in comparison to a 4age without a cooler but I wonder if its that noticeable...
Last edited by Mk1_Deano; 28-02-2013 at 15:47.
A man who asks is a fool for five minutes. A man who never asks is a fool for life.
Well I've been looking at 4age 20v oil pressure problems with coolers but 95% of what I've looked at have said that the oil pressure should remain constant although you will have a slightly lower oil pressure due to pressure losses in the cooler since the thermostat never completely closes. I'm working on the basis that the sandwich plate is a thermostatic one and reduces cooler flow when 'closed' so that the engine doesnt have an in rush of cold oil when the oil reaches the temp to 'open' the stat. This would mean that VVT could be a little sluggish in comparison to a 4age without a cooler but I wonder if its that noticeable...
I haven't got a thermostatic sandwich plate, so pressure should be constant?
I'll dis the vvt solenoid and give it a blast up the road. See if it still chatters.
Cheers
P.s performance doesn't seem affected at all and always good pressure even after a stage with thin oil.
It will never be constant in the sense the oil pressure will vary with rpm but with a cooler it will be slightly lower than an engine without and shouldn't fluctuate unless its the VVT solenoid that causing it as suggested
A man who asks is a fool for five minutes. A man who never asks is a fool for life.
So, if I do find it's the vvt solenoid causing it - is this an issue?
I shouldnt think so, if there was a real issue with oil pressure then the accusump will discharge thus protecting your engine cos thats its job
The annoying thing is that my car and engine is in so many pieces I cant just go and see if I get the same results
A man who asks is a fool for five minutes. A man who never asks is a fool for life.
Thanks for the replies. Will let you know my findings.
You be able to hear if VVT is working or not Steve. Firstly the relay will click on/off when you the rev the engine and under accelaration the engine note will change too.
I assume the engine is still running the VEMS ECU and same map when it was in Ali's Chevette? If so then I know Ali mapped the engine himself and his settings would determine if VVT is activated at all or if there different from how the factory settings work.
That engine is definately a good one and the most important thing is its got good oil pressure. As Dean said, if theres a problem, the accusump has that under control.
I like the sound of this car. Get some pictures up
@ Deano - Come on m8, get that car finished.I need a quick car to race against
RWD Escorts - Making the competition look like c**ts since 1968!
http://www.turbosport.co.uk/showthread.php?t=283283You be able to hear if VVT is working or not Steve. Firstly the relay will click on/off when you the rev the engine and under accelaration the engine note will change too.
I assume the engine is still running the VEMS ECU and same map when it was in Ali's Chevette? If so then I know Ali mapped the engine himself and his settings would determine if VVT is activated at all or if there different from how the factory settings work.
That engine is definately a good one and the most important thing is its got good oil pressure. As Dean said, if theres a problem, the accusump has that under control.
I like the sound of this car. Get some pictures up
@ Deano - Come on m8, get that car finished.
Has been remapped since, vvt is working - makes a big difference to the figures...and the view through the side window!
160 bhp from a Silvertop? Impressive figures. Who done the mapping for you? Looks a nice car by the way
RWD Escorts - Making the competition look like c**ts since 1968!
Iclandic chap who used to work for cosworth did the mapping. Cheers not sure about the bloody mud flaps I have to run on TARMAC rallies though.
Will post up the graph.
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