Thread: 1991 Rangie. BAD Engine knock.

Sounds like a slipped liner mate.....

Slipped Liner? - I am not sure that I like the sound of that??
Firstly are there any ways to test for this problem?
Is it repairable?
Regards,
Now a nervous Shirley......

Hi Shirl
Well, what can i say


It won't be blocked push rods as they are solid metal
Carefull investigation is required from here on, to find the source of the knocking sound

One thing to be clear about is you are not having coolant loss or overheating problems???


First of all ... You need to identify which piston is the culprit
Using a piece of garden hose (900mm long) you have to place it on the rocker cover then down the side of the head near each spark plug to get to where the "noise is loudest"

I fear to answer the problem as being .. The gudgen pin connecting the piston to the conrod

To test this theory...
Take out spark plug
Turn piston over past it's TDC .. so it is on the down stroke
Put slim BLUNT screwdrive through spark plug hole in head & push on piston
If the piston "moves down" .. it may indicate movement in gudgen pin

You may have to repeat this method a few times to rule it out

I know that you have been using a mechanic to fix the problems
what has been his thoughts??? (as he has been listening to it)

Hopefully one of the other highly experienced folks on this site can shed more light on your situation

Mike

Hi Mike,
Gossie had it for about 3 weeks or more and found that the Rockers were stuffed and the big ends and mains were down to copper, so all that was replaced.

Originally Posted by Shirldownunder

Hi Mike,
Gossie had it for about 3 weeks or more and found that the Rockers were stuffed and the big ends and mains were down to copper, so all that was replaced.

Sent you a PM
A lot of money has been spent on this motor
Let's try to get the solution right, before you spend another dime

Does this car lose any coolant???
Does this car have overheating issues??

No coolant loss, Normal operating temp and except for the intermittent knocking under load, goes like a rocket........

How many Ks has the engine done??
Did you replace the Cam with the Lifters??
Gudgeon pin noise will change between when its hot and cold its also something that I think is not incredibly common with this engine unless its been stroked??

Rover V8s are know for tappet issues if the cam/rockers/chain and lifters have been replaced then move on to the lubrication system (check the oil pressure) if this is ok then slipped liners are a real possibility
Are you having problems with missing coolant??
Have you overheated it??

I too have worn out mains and bigends on these things but have found the valve train to be a more common weak point

Slipped liners are more common on larger engines but it isnt unknown if it has been overheated


I feel your pain the issue here is dont go on a wild goose chase and dont spend more money without knowing facts

Are we talking a knock or a tap???

Originally Posted by djam1

How many Ks has the engine done??
Did you replace the Cam with the Lifters??
Gudgeon pin noise will change between when its hot and cold its also something that I think is not incredibly common with this engine unless its been stroked??

Rover V8s are know for tappet issues if the cam/rockers/chain and lifters have been replaced then move on to the lubrication system (check the oil pressure) if this is ok then slipped liners are a real possibility
Are you having problems with missing coolant??
Have you overheated it??

I too have worn out mains and bigends on these things but have found the valve train to be a more common weak point

Slipped liners are more common on larger engines but it isnt unknown if it has been overheated


I feel your pain the issue here is dont go on a wild goose chase and dont spend more money without knowing facts

Are we talking a knock or a tap???

Good point on the oil pressure
From memory, Shirl didn't change the cam as it was OK