I was just wondering if they look like sleeves to you guys? He is selling it for 200$ obo but he didnt state if they were sleeves or not.

 

Looks like stock sleeves if thats what your asking...

 

He had a block guard installed, Stock sleeves

 

Looks like a Nuformz block guard.

 

arent block guards harmful ?

 

Block guards rob the cylinder head of proper cooling. This can lead to pinging (knock) and KA-BOOM!!!
I would avoid this block like the plague if the guy is telling you it's sleeve. Chances are he's stupid and doesn't know what he's saying or
a crook trying to take you for a ride and your hard earned cash. Good luck mang.

 

Never had a block guard installed on my motors don't like them really. But u can pull it out and still use the block if its still good

 

Block guards are only harmful if they are installed improperly or of a poor quality.

They will not rob the head of cooling if there is a 1/4" to 1/2" space left between the cylinder head surface and the top of the block guard. Also as long as there are a sufficient number of ports in the guard to allow the flow of coolant from the bottom of hte block into the head. In this respect this install looks to be good.

The other way that a guard could be harmful is if the cylinders are forced out of round or shifted due to the install. this can be checked and fixed a machine shop.

As far as wondering if the cylinders are sleeved or not. If he didn't state that they were, they probably aren't.

Other than that it's hard to tell in those pictures. They could have a set of dry sleeves installed. You would have to measure the OD and ID of the iron sleeve liner. And see if they match ether the OEM or a sleeve manufacturers specs.

 

My experience with them comes from my friends who ran them in their set-ups and encountered cooling and pinging issues.

I guess that would make sense, but I honestly wouldn't run them.

 

I wouldn't personally run them ether. However, I have installed them in other peoples engines and after a proper install and block check. There have never been any over heating or pinging issues. Sounds like installer error or a tuning issue.

Darton MID sleeves use a an integrated deck (similar to a block guard) and they have 0 cooling issues.

 

if installed properly on and properly put together setup and tuned properly, you shouldnt have any issues. highly recommend using a golden block guard, like ghost accord said, have the machine shop check the cylinders. my tuner made 700whp with a g.e. block guard on a stock sleeve b20.

 

I'm doubtful of that last part you said, but anything is possible I guess. Any way of proving this?

 

yea, and my CRX has a d16 in it with 800 HP all motor...

 

i will se if he will post a pic and video. stock b20 sleeves are stronger then you think.

 

I'd love to see the proof. There is no way a b20 made 700 on stock sleeves. Maybe, and this is a stretch, but it might be possible with the cncwerx CSS.