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There are no stupid questions, but... What size is my engine?

P Painting101
Hello everyone,

I haven't posted in a while - been too busy finishing school, studying for the bar, and becoming a real person!

Through a series of transactions last year, I stumbled upon an engine that was built by GEX, and installed it in my car. Unfortunately, that's about the extent of my knowledge of the engine. I called GEX with the block number, but the engine was built before their computer system, so they couldn't look it up.

So, now I'm getting ready to sell my car, but I don't even know what size the engine is! Is there an "easy" way to figure it out? (I'm not going to dissassemble and measure bore and stroke).

I can get some more info when I get home from work. I know this thing is built up, b/c it's so much more powerful than the 1600 that was in there, but I don't know how much.

Any advice would be appreciated.

Thanks,
Adam
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P Painting101
Hello everyone,

I haven't posted in a while - been too busy finishing school, studying for the bar, and becoming a real person!

Through a series of transactions last year, I stumbled upon an engine that was built by GEX, and installed it in my car. Unfortunately, that's about the extent of my knowledge of the engine. I called GEX with the block number, but the engine was built before their computer system, so they couldn't look it up.

So, now I'm getting ready to sell my car, but I don't even know what size the engine is! Is there an "easy" way to figure it out? (I'm not going to dissassemble and measure bore and stroke).

I can get some more info when I get home from work. I know this thing is built up, b/c it's so much more powerful than the 1600 that was in there, but I don't know how much.

Any advice would be appreciated.

Thanks,
Adam
FM Former Member
In most instances it's very difficult if not impossible to determine the cubic centemeters of your engine. Even if you could see the cylinders and compared them to different sizes, you still don't know what length crankshaft is installed.

SO, the bottom line answer is UNKNOWN

by the way, and not to hurt your feelings, GEX is probably one step above dog crap.
P Painting101
I've heard plenty of bad things about GEX. I pretty much got the engine for nothing, so if it breaks, it only cost me the 45 minutes to swap motors, and it's been a heck of a drive since I put it in.

I tried tracking down the previous owner, but that was a fruitless search.

... and I understand the need to have a car with character. I've had this for about 4 years, and it was the first car I've ever built. but now I think I need a car with character, AND a back seat.

so, the short answer is: there's no way to find out engine size. That's what I figured, but I just wanted to double check.

Thanks everyone.
P Painting101
Follow-up...

Still no clue what size the engine is, but I want to adjust the valves now. However, I'm not sure what the gap should be. Any suggestions?

It's got dual Weber 40 IDF Carbs. What else do you need to know?

The weather should be nice on Sunday, so I'm planning on taking some pictures so I can put this up for sale. Just want to get everything adjusted properly first.

Thanks in advance, everyone!
WildBillWildBill
Adam, You could find out what size your engine is, but you'd have to pull off a cylinder head to measure the bore and stroke.

Before setting the valves, ya gotta determine what your pushrods are made of. Remove the valve cover and put a small magnet to the push rod. If it doesn't stick, you have aluminum rods...if it does you have steel pushrods.
I have alum. p/rods and set my exhaust valves to .006 and the intakes to .004. Steel p/rods set to .000-.001

~WB
WOLFGANGWOLFGANG'89 CMC FWB, FL Supporting Member
If it is an OEM block the engine number will only give your build date and original size. A lot could have happened to it the last 35 years! Many replacement factory blocks had no serial numbers - same with aftermarket improved aluminum blocks. Guess if its one of the aftermarket improved blocks chances are it has better than the 69mm stroke - hence could be higher performance. You could get it dynoed as a sales feature (proof of performance)-- if under 75 HP then its pretty stock if over 90 HP then hot!
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