Changed the oil?

Maybe your oil pump is starting to wear out a bit and its taking longer for it to build up pressure.

Maybe a $40 investment in a speco oil pressure guage wouldn't be a bad idea!?

just to let you all know the oil filter didn't fix it... not quite sure what to do at this stage.

Unsure if it's worth ripping the engine out, ripping the sump off and checking the bearings?

Burning oil? Hows your oil pump? Does the motor leak bad anywhere which could result in losing pressure from that area?

burns some oil, i think out of valve stem seals/valve guides. the head gasket is blown and this has to be repaired. The engine was run for some time without an air filter in dusty conditions, but the lpg converter seems to have caught the dust, and i don't think the rings/bores are stuffed. I was kinda hoping to sort the oil pressure problem out before ripping the cylinder head off. Should the bores be stuffed (which i don't think they are) then the engine will come out as well.

 

oils only 5k old although it was doing it with fresh oil. don't think there is a whole lot of coolant in the oil either (doesn't seem that way) it is just pressurising the cooling system....

 

The oil pump/bearings etc are 130k old at the most and it has had semi-regular/regular oil changes all its life.

 

Robert.

If its popped a head gasket through the bore to oil gallery then yep, you're going to be losing pressure for sure.

 

Might want to change that head gasket me thinks :lolcry:

Dude, you should have told us the motor had a blown HG to start with, as Raven said you'll be loosing oil pressure from that, and it there is an water in the oil then this will also reduce the engine ability to pump it properly.

which is the part number of genuine toyota filter for 4k motors?

doesn't appear to be water getting in engine oil, seems to be combustion/exhaust getting in cooling system pressurising it and making it lose its water. do you think oil may be escaping through the head gasket to the combustion chamber? honestly that hadn't occured to me.

 

the trouble with cars is that there is rarely just one cause of a problem, its always a mixup of two or more different problems to produce odd symptoms.

 

that being the case, i think i will leave the engine in the vehicle, do the head gasket, remove and clean the radiator, and kit the carburettor (the float bowl is loose on the throttle butterflys.... very interesting) and pop it all back together with a ryco z68 and 15w40 magnatec and see how it all goes. providing of course i don't find problems with the bores when the head is off. there doesn't seem to be bearing noises which is promising at least :dance:

 

Robert.

The engine was run for some time without an air filter in dusty conditions, but the lpg converter seems to have caught the dust,

 

The converter filters the gas, The air still goes in through the air filter.

the gas mixing with the air/dust seems to have moistened the dust and caused it to stick in the converter with a very very minimal amount making it through (hardly any at all) to the carburettor throats.

 

obviously air filter should be filtering air because this clogged the converter up badly.

 

Robert.

the gas mixing with the air/dust seems to have moistened the dust and caused it to stick in the converter with a very very minimal amount making it through (hardly any at all) to the carburettor throats.

 

obviously air filter should be filtering air because this clogged the converter up badly.

 

Robert.

 

I used to work for komatsu, I was licensed to work on gas systems, The air and gas is separate well beyond the converter.

by converter I think I mean mixer or LPG carburettor doodad thingiewhatsit or somesuch something.

 

the thing that allows the gas to flow into the air stream/air duct before the carburettor. After some googling I think you would call it a gas carburettor... very oldschool looking thing.

 

Robert.

by converter I think I mean mixer or LPG carburettor doodad thingiewhatsit or somesuch something.

 

the thing that allows the gas to flow into the air stream/air duct before the carburettor. After some googling I think you would call it a gas carburettor... very oldschool looking thing.

 

Robert.

 

Mixer perhaps?