Used car possible small claims advice.

[Lucasboat]

Are the garage prepared to give a witness statement about the state of the engine and the impossibility of it deteriorating that amount during the period of your possession.
You will need to build your evidence and then perhaps the best option will be to try and obtain a price reduction from the dealer which covers your costs.
This will be a cheaper option for them than fighting a court case

Yes, they have documented everything they have done and are going to put it all in a report backed up with pictures.

should I write to the dealer with the evidence asking for a price reduction?

[des8]

Wait until you have that report to hand.
At that point you'll have a clearer idea of the position and we can then help you draft that letter.

[Lucasboat]

Thank you. I will update the post once I have it.