got my bro a damages mr2 1990 j spec n/a manual

 

it had been damages by the guy when he was drunk, obviosly no insurance stuff :)

 

anyways rad was split, when went to look at appaeared fine... apart from the obvious front end damage

 

got it fixed and painted on saturday... when ever the engine warms up and been driven for about 5 - 10 mins the is severe knocking noise ....

 

any body any ideas ?

 

crank ... would not last

 

cam wear ......

 

i am going to flush the system and put in nice new THICK oil and see what happens

 

any ideas greatly appreciated scottie

big end bearing rattle when the oil has thinned?

 

Thick oil would only disguise it a little - it would only get worse and wreck the crank.

 

Dont suppose its easy to get the sump off one of these to check the big end shells?

yip .. dead handy to get of the sump ...... shells are usually quite cheap arent they ?

 

would the play be felt by hand ?

the noise is not there when cold ... when warm just when engine is under a light to modeate load ?

Sounds very like shot big ends. drop the sump and take off the end caps. The shells will tell the story - the bearing white metal surface will show wear on the stuffed one and you might also have wear on the crank journal - not so good. Not sure you can feel this but it will be obvious on the run big end once the shells are open. Dont mix up the big end caps - they're paired with the conrods. Torque settings etc critical with these when re assembling.

 

If not too bad you might get away with new big end shells and a light clean up of the crank journals - depends on how long you expect the engine to last or how much power you try to wring out of it in future. Might need a micrometer to measure true wear and ovality.

 

Proper solution if the crank is damaged is a regrind and undersize shells.

thanx ....

more investigatin to be done :eek: