Well this can go both ways... Usually Bilal Gunj Engines go a long way. They give you 8 days warrantee and 8 days are enough to judge an engine for 2 main reasons : 1) Any weird Sound coming from the Block or Head. 2) Worn Out Rings OR Valves "Engine giving smoke when started & when accelerated. Or reducing engine oil"
Now let me tell you 1 thing.. The Engine I got from Bilal Gunj the 2nd time, was all OK except for 1 issue.. It had a weird and heavy sound of "Tak Tak Tak Tak" for around 1 minute, only when started in the morning "when engine was cold" then as soon as the engine warms up a little the sound goes and never comes back the whole day, it only came when the engine was cold ,like car not used for more than 6 hours..
I Noticed this sound the 4th day of swapping that engine.
But that was an alarm, any unusual sound coming from the bottom or even from the top of the engine assembly is never a good sign. So I complained about it to the shop keeper and asked him to replace the engine as the sound was not a sound to ignore, I made a video of starting the car early morning and captured the audio of that Sound as a proof... Anyways after showing the video and then getting the car physically inspected to the shopkeeper and with alot of Behas and logical comments, he agreed to replace the Engine..
Now the Car has a 3rd engine, which looks and feel ok. No Weird sound when Cold OR Normal temperature. Got it replaced day before yesterday. Hoping for the best this time 
Lesson to Learn : Never buy something BIG like an engine etc without any reference from Bilal Gunj..
It took me 2 days, to get it replaced, because the sound only came when the engine gets cold and that was early morning. Then they asked me to come to Bilal Gunj as they would show the car to their own mechanics and see what he has to say, They already have setting with their mechanics and then just give you 1 statement " Paen Ay Normal Aay" "Itni awaaz kya kehti hai." Then they try to convince you with things like " Let us get this engine fixed for you" instead of replacing it,. and giving silly suggestions like aap 2 dafa is ka oil jaldi jaldi change kar k dekhein, aap is ko Motorway par chalaien 120 ki speed par continuously, etc etc, I told them that i used AMSOIL Engine flush and drained out the first oil in 20 mins the first thing when i fired this engine.
I luckily had a Bilal Gunj shopkeeper involved in procuring this engine, He is a neighbouring shopkeeper of the shop from where the engine was bought, and that Shopkeeper was on my side, as my claim was valid, still it took me 2 days to convince them that this is a valid claim to get the engine replaced. Imagine if there was no one from Bilal Gunj involved, I can assure that they would've never replaced the engine...
