The Mitsubishi Pajero Owners Club®

BLACKBART

I have recently aquired an l200 with the 4d56 motor in and it is doing naughty things.

It really hates starting despite new heater plugs,fuel filter/ conditioner. I have even done a compression test which is a bit baffling as it came out

No 1 - 31.4

No 2 - 21.6

no 3 - 21.6

No 4 - 31.2

Anyone shed some light on what those results are pointing towards ? ?

Can a head gasket be gone without showing any signs ?

Any and all help would be much appreciated thanks

Google · Sponsor

hutchy · Posted: Tue Jan 21, 2014 19:49 Post subject:

well those readings are out but that could be down to valve adjustement as the valves can be manually adjusted so i would start there,and do another test..the valves can be set on a cold setting which if i can remember is 0.15 thou but im sure someone will correct me on that measurement....the other thing is ive just had the tank out of one of these at the weekend as it was struggling to start and intermittent loss off power..this was down to the tank having *beep* in it and blocking the stack pipe filter..once i cleaned it out along with cleaning the stack filter and put a new filter in the engine bay it,s running perfect now..not saying that is your problem but, it,s worth checking Wink

BLACKBART · Posted: Tue Jan 21, 2014 21:14 Post subject:

CHEERS Hutchy

This one also has a lack of power once it can see a hill coming ! with the EML at the same time as the power loss. Then leave it for a bit and the EML is gone ?

The garage are puzzled and could only come up with " take the head off and have a look "

I will have a look at the valves and find out the exact settings.

cheers

albideli · ***** Joined: 19 Nov 2010 Posts: 546 Location: Derbyshire

try blanking the EGR valve, could be sticking open or just plain knackered, quite common on these and a cheap mod. It'll put the eml on under load, poor tickover and flat spots plus poor starting if its dumping spent gases in on startup.

hutchy · Posted: Tue Jan 21, 2014 23:50 Post subject:

i would do valves first make sure they are all set right then do another compression test if any valve adjustment is done if that is all ok,but still has lack of power then drop the fuel tank and make sure the filter on the bottom of the stack pipe is clean and clear,and fit a new fuel filter on it in the engine bay Wink

BLACKBART · Posted: Wed Jan 22, 2014 0:04 Post subject:

I plan to do (if it hasnt already ) the dreaded EGR but i am gonna check the valves first to see if that could explain the large gap in compression.

geodrome · Posted: Wed Jan 22, 2014 10:54 Post subject:

What model and year is it?
Post 2006 models suffer from the inlet manifold caking up, from the egr and blocking sensors etc.

Mark3 · Posted: Wed Jan 22, 2014 13:37 Post subject:

Head gasket may have blown between cylinders 2 and 3 causing the low and equal compressions, I seen this before a few times, also I doubt valve clearances will make any difference to your compressions at starter motor speed.

BLACKBART · Posted: Thu Jan 23, 2014 0:38 Post subject:

BLACKBART · Posted: Thu Jan 23, 2014 0:41 Post subject:

hutchy · Posted: Thu Jan 23, 2014 10:37 Post subject:

it,s common for the balance belts to go which is why i never replace them,just the cambelt,before removing the head,,remove the timing covers and see if any of the balance belt is jammed in the timing gear,if not see if the timing lines up take the rocker cover off and have a look in there..these engines are designed so the rockers fail if there has been any piston valve contact,,,if there is any damaged rockers or cam caps then there is no need to remove the head as these are sacrificial and can be easily replaced Wink

BLACKBART · Posted: Thu Jan 23, 2014 12:37 Post subject:

The cam and pump pulleys line up but havent got the bottom cover off yet. The belt seems very slack tension wise though. I think it is supposed to be about 5 mm travel if you poke it and this one is more like 15 - 20 mm and i am pretty sure i could just slide it off without touching tensioners ! !

I dont think i will bother with the balance belt replacement as my pajero did not have one when i got it and it ran fine for the 3 year i had it.

hutchy · Posted: Thu Jan 23, 2014 14:10 Post subject:

the belt is probably stretched or tension is out but i wold replace the belt and tensioner for piece of mind Wink

BLACKBART · Posted: Thu Jan 23, 2014 15:21 Post subject:

OK top timing mark spot on.....pump timing mark spot on..... bottom timing mark (going off the cover) has a mark on the plastic which says ATDC then a few dots and the number 10 where exactly should my pulley mark line up on ? the line at TDC or the 10 or somewhere inbetween ??

hutchy · Posted: Thu Jan 23, 2014 15:35 Post subject:

i wouldn,t rely on the plastic cover timing mark,your better off removing the cover and use the mark on the crank sprocket and on the lower engine case...ive done a few of these for people and found the pulleys may have been changed or the outer shell of the pulley has been 1 or 2 teeth off causing running issues along with other problems Exclamation