The maximum allowable overbore on a 4g63 is .040" or 1.0mm. .060 is 1.5mm which is an 86.5 mm bore, the exact bore size on a stock 4g64.

Does the motor have oil squirters? You can install them on a 4g64 with extra machining, but if it doesn't that would be a sure fire indication that its a 4g64 block. Also the fact that the ID block is ground off would almost for sure indicate it.

If you look on the firewall side of the block, in the middle about 2" above the oil pan, the 4g64 will have an area protruding out that looks like an oil return fitting would bolt to it but theres no hole for the oil, only threads.

 

CO_VR4, I am a little disappointed as I thought believed that it was a .020. Will a .060 bore negatively effect performance, or motor longevity? I am not worried as much about future bore's on the motor. Thanks for the input btw.

GSNT, I am not near the motor, it is at a friends shop, I wouldn't know were to look for the oil squirters... Since the bore is .060 (same as a 4g64), do i just need to go out and buy a 4g64 aftermarket head gasket (The stock one might now be as good as the stock evo head gasket)?

So bummed out but I am determined to get this to work. Along with the motor debacle, I got rebuilt my tranny at TRE, got a Tilton twin disc hybrid clutch, intercooler, ported polished head with crower retainers, valves, and 280''s. So I am excited and will just be short a 35r kit from attained 550-600 whp...

 

I've got a new stock head gasket on the bench I just measured. It's 86mm. If in fact you are .060" over the stock 85mm bore of the 4g63, then your stock head gasket should hang over into the cylinder like you are experiencing. 85 mm + .060" overbore is 86.5mm, too close to the 4g64 to think you got anything but a 4g64. The seller needs to somehow prove he sold you a 4g63.

Why can't vendors just be straight up and honest?

 

Things are starting to make sense. If I got a 4g64, and he is saying its a 2.3 liter... that means it was destroked? or is it probably a 2.4 liter and the thought was i was dumb enough o not notice? I dont mind the extra displacement, I think plenty of people are running 2.4 4g64's if that is indeed what it is, but I will need to know what is for future mods and tuning... such a sketchy situation

 

if the motor is what the vendor said it is (4g63 w/ 86.5mm/.060 bore) then a head gasket for it doesnt exist! i can't find it anywhere... would a 4g64 head gasket work on a 4g63 (should be same bore but worried about other fitment/reliability issues)? anyone?

 

You can use a 4g64 head gasket but it is quite a bit thinner than the 4g63 one. If that is done, you need to have the piston tops measured at TDC in relation to the deck surface. If they are absolute zero deck or even protruding, I'd be willing to bet you'll run into head/piston contact issues at higher rpm with the thin head gasket.

 

what about an aftermarket gasket like an hks head gasket or cometic head gasket made for a 4g64... will it be any thicker then stock?

 

I think that the simple fact you purchased something, and it appears to be something you DID NOT WANT/ORDER, and the fact the numbers were ground off the block, and the problems you are having with rectifying this problem with the company, YOU SHOULD feel you are doing us a "service" by revealing who this is. Think about it this way.... Some kid (I can say that, I am 42) is probably getting ready to purchase something from them right now! Do him/us the courtesy by mentioning the shop. This seems like a legitimate concern, and something we should be aware of. Why would you leave them "nameless" and post this thread publicly? Spill it bro!

I also think we need to impose some kind of "checks and balances" as far as vendors go. Too many legitimate complaints, honors them and escort off this site. I am not behind the scenes, but putting vendor money over your members and their money would be unfortunate and blow. Make them more accountable for crap like this! Just my 2c.

 

I am still hoping to work things out with out disputing the charge... The main reason for the thread is for guidance of working what I have and getting this thing to work properly. The vendors rep is already well known (not sure why I went with it though) so yet another complaint won't do much... I really hope to just figure out which gasket to go with and be on my way and get this thing back.

 

You got me and the evom community standing behind you...........I hope they do the right thing and take care of you!! Good luck. I will keep tabs on this, to see if, in fact they do fix it.

 

+1

BTW, if I were to hav ea .060 overbored 4G63 that I paid for I would be pissed; id much rather have a 64 with thicker cylinder walls. As far as identifying, just look up threw the block (or down) towards the bottom of the cylinder walls and you will see the squirters. The 4G64 also has a longer stroke which a lot of times isn't a bad thing, but some prefer their rev's over max torque. The deck height on the 64 vs. the 63 is 6mm taller to compensate for the stroke (another way to tell). Then again I don't know much about the 2.3's people are running and what kind of rod angles/ratios they have and which would actually be better.

I just think that regardless of what you have, if its not what you paid for and wanted then you shoudl take appropriate measure to correct the situation AS WELL AS enlighten everyone as to the vendor. Its not like you have bashed them or slandered the name, you've stated facts so far and there is nothing wrong with this.

 

Yeah this seems like a pretty one-sided CC dispute if you chose to go that route. They claimed to be selling you one thing and shipped another. Now it sounds like you're trying to make lemonade of out of lemons - or they're trying to convince you whatever you received is just as good as whatever you intended to order. Which is respectable but entirely unneccesary. Ship it back. Dispute the charge. Get the money back. You won't even have to deal with the vendor.

 

You have two choices of gaskets. The cometic can be purchased with 87mm bore. But to use a metal gasket your head and block would have to be surfaced to a very smooth surface finish. Most machine shops do not put a fine enough finish on the surface. You would have to ask for it. Your second choice is to use a felpro. It is 87.5mm bore. Can be used on .080 over bore on 2.0/2.3 and .020 over on 2.4. Hopefully you do not have a 4g64 block as they are 6mm taller. You have to use the 1994 dohc galant timing belt and cam gears.

 

I should send it back... I am looking at other deals from various vendors right now, for an extra 600 bucks i would get a 2.3 made by SBR from a new block oem block. I think Buschar, AMS, and others a little more expensive.

 

I say you get what you payfor. You can't go wrong with AMS or Buschur in my opinion.