VK 202 Oil Pressure HELP!

[VK 202]

Today after getting my first car on the road and driving it around i experienced the first problem being, when i start it up it runs fine for 20 minutes or so but then after a while it has a loud ticking noise coming from the engine and the vacuum gauge starts jumping around all over the place and the oil pressure gauge goes right down below the red, i was told at first the oil pump was stuffed so i had that changed today along with a new oil pressure sensor and tonight after taking it out for a drive after 2 hours or driving it happened again, Does anyone know what the problem could be? Thanks in advance =]

[vkberlina]

Whats the engine? EFI or Carb?
What oil & Filter are you using?
Does the RPM surge at the same time??


scott

[VK 202]

Its a 3.3 ltr carby, has a ryco Z30 oil filter on it at the moment, and its only got the vacuum gauge in it which jumps around like crazy when the problem happens

[mondy888]

is it leaking oil anywhere if not it could b internal

[ari666]

i cant see why oil pressure would affect vacuum or vice versa, they are not really related, unless you are talking about a SERIOUS internal issue. does the oil pressure go up and down still with different revs?

i would be willing to bet that you have a suspect lifter or tappet/rocker. failing that i would be looking at cam lobes. but if a lifter is working when the oil is cold(thicker) then bleeding out when it is hot (thinner) then that will be your prob.

you need to get the car to fault, so drive it around till it starts playing up and take one spark plug lead off at a time. each time you take a lead off the engine will struggle to idle, and may even die. if it dies or runs rough, then that cylinder is OK. plug the lead back on and move to the next one. what you are looking for is one cylinder that makes no difference with the lead on or off.

if you find one that makes no difference, then there is a dud something going on there. do that and let us know ey

edit* i didnt even ask; does the car run rough when it is faulting? if not, ignore all that i wrote above. lol.

[mondy888]

could be a welsh plug in the engine. i think thats what there called give that idea above a go its ur best bet

[VK 202]

When driving the car after a while the oil pressure gauge goes right down off the gauge and then theres a loud ticking noise from the engine, it doesn't run rough just when accelerating the ticking noise from the engine becomes louder and faster, I was told today to do an oil change and to replace the filter as the car was sitting for a few months without being driven, is it likely that the oil has gone bad and is being thinned out too much when its getting hot as ive been told? I put the new oil sensor on today and it seems to be working, but it goes down a bit when driving still.

[vkberlina]

202s have lousy oil pressure when idleing due to bearing clearences on the crank. I was wondering if it only happened at idle but its not.

It wouldnt be a welsh plug as they are used to block off holes from casting the block and would be leaking fluids.

What brand and grade oil are you using? You do have enought oil in the engine dont you?? checked it on level ground engine off??

I am thinking it could be a blocked oil pickup there could be crap in the sump blocking the screen, it would be work pulling the sump off. I have seen poorly serviced engines do this over time as the engine is running chucks of carbon clog the filter screen of the pickup and starve the engine of oil. when you shut it off the falls off the pickup.

The other problem would be worn big end bearings, while the sump is off you can check they condition and plastiguage the shells and make sure they are oil.


cheers
Scott

[VK 202]

I did an oil change on it yesterday and have also put new spark plugs in, the old oil was really thin, i used castrol 20W-50 in it, theres plenty of oil in it, since then it seems to be alright but the oil pressure seems a little low still while driving it sits just over a 1/4 on the pressure gauge, where should it normally be?

[ari666]

1/4 on the guage at idle? or while driving it? really it should go up and down. but if you get 1/4 at idle thats pretty good. i am using 15-50 oil atm and i get a bit less than that at idle when its hot, but its all good.

did the ticking noise go away when you changed the oil? what about the vacuum guage? any ideas if they were related?

[VK 202]

it sits on a 1/4 at idle and goes up to just under 1/2 in drive, the ticking noise is still there but its only faint im not sure what it could be, maybe the harmonic balancer needs to be replaced? its also got a vacuum leak from the carby i was told from a bloke at the carby shop and he told me that the carby on it atm is from a blue 202, im looking at replacing it next week, what would be the best way to go? to just get a good reco varajet or to go with something such as a holley 350 as i have the carby its just the matter of changing the adapater plates over and the cable and getting a kit put through it, any suggestions would be great

[ari666]

harmonic balancer is a lump of steel and rubber, so if its ticking.... RUN AWAY REALLY QUICKLY, lol. no. dont stress, its not the balancer.
i wouldnt mess with the carb if i were u. just get it tuned and leave it be. sounds like you may be spending money uselessly. unless u want some performance increase.

[VK 202]

Yeah not too sure, the throttle body on the carby is all stuffed and is all loose, and seeing as tho its off a blue 202 i was told that putting a black 202 reco'd carby on it would be the way to go, as it revs too fast in park and in drive its too slow and my mechanic has said that the carby's pretty much stuffed, so im just weighing up my options atm

[starfire vc]

before you go pulling your engine apart.buy a decent oil pressure gauge and see what it reads..

[ari666]

Yeah not too sure, the throttle body on the carby is all stuffed and is all loose, and seeing as tho its off a blue 202 i was told that putting a black 202 reco'd carby on it would be the way to go, as it revs too fast in park and in drive its too slow and my mechanic has said that the carby's pretty much stuffed, so im just weighing up my options atm

well its not too hard to fix up yourself. i dont know about these carbs specifically to be honest, but they cant be much different from a regular one. run over the carb and tighten all the screws/bolts that hold the body together, spray an enormous amout of carby cleaner in it/on it/ all around it to clean off the gunk and if you can afford it, but a vac guage and timing light and tune it your self.

i would guess that the old carb would be better/easier to tune as they usually have less pollution crap to deal with. but once again i am ready to be corrected.

[vkberlina]

The varajet carbs are easy to rebuild you can buy a small parts/rebuild kit, the hardest thing is getting the float level right, even with the directions the first few times took a couple of goes.

I used to have a spare carb when i had a carbie 202 and leave it soaking in a drum of deisel untill I needed to do a rebuild. The carbon and crap used to fall off the thing after about 6 months of sitting in it.
Just used to then clean it down dry it all out and rebuild it and just swap it over on the car.

The directions come with the rebuild kit, just an A4 page, pretty simple. I do have a varajet manual in PDF somewhere I think if you need a copy or want something really indepth

cheers
Scott

[Tree cutter]

The ticking noise you could hear when it lost oil pressure would be the lifters running out of oil. When the lifters run out of oil your valves wont open as much as normal which could cause your vaccum gauge to flicker.

[commy vk]

It could be a rocker has gone and it's no big deal to check it out.
Remove the rocker cover and give each one a wriggle and then turn over the engine by hand and see if each lifter is moving up and down.There is zero tollerance between the valve and rocker.
If it is the oil pump then that is also not a drama to change,just need to drain sump and remove.

[VK 202]

Since i last posted something on this post i've had a few things done, i did an oil change with a new oil filter, put a new oil pump on have had a new rocker cover and gasket put on and has been running fine without the oil pressure dropping

[Paiste402]

I had the same problem, it was the oil pump wearing out. It would have great oil pressure when cold but when it warmed up it dropped like a stone and started ticking. Didnt feel like changing the pump so i just put some really thick oil in her and it was all good. Pressure wasnt the best, prolly half way up the gauge but it was up and didn't tick.

[VK 202]

yeah same problem as what i had, but i thought might as well change the pump while i was at it haha

[budgieVH]

i had the same problem with my blue 202 in my VH.. if i would give it a bit then at next set of lights or when i stop the vacume guage would be all over the joint and engine always felt like it was going to stall.. RPM guage moved a little bit aswell.. only a couple of times i have had the ticking noise is once going around a corner fast and sometimes on a cold morning but after a while it would stop.. it sounded like it was coming from the back of the engine (closest end to the firewall)

hope your problem is fixed.. mine isn't