browney

Is there a way that you can tell what year and model your engine came from by looking at the block?

Keaponlaffen

the '79-80 engines have a smaller rats nest with only 3-4 vacuum switches, the later models have like 5-7 I beleive. Also, the older (79-80) engines have an extra little opening in the block on the exhaust sealing surface for the thermal reactor. It's about the size of a nickel I beleive... There's more things I'm sure, that's all I can remember right now...

browney

This is for a newer 13B that has been put in a 1st gen before I bought the car, I wanted to find out what series 2nd gen it was from.

Keaponlaffen

ahh, well you should have specified that

I don't know anything about 13B differences, never had one... so you'll have to wait for someone else to answer...

browney

Yeah sorry, my bad
What I'd really like is a way to identify the engine by a number printed on the block or something?

AdrenalifeRX7

what if it's a pre 1978 13B... such as a REPU motor...how do u tell the exact date?

browney

I know it is from a TII, I wanted to know if it is a s4 or s5

Manntis

ask the previous car owner

browney

She had no idea! She thought the only changes to the exaust system was the tip but it actually had headers with a 2 1/4 inch system all the w ay back!

Kill No Cone

iTrader: (6)

I asked the same question a couple of months ago and received a few responses with photos. Use the forum search function and use "Series 4 and series 5" in the search.

If I recall, the series 5 engine has an extra hole drilled and tapped above the spark plugs.

good luck

browney

I have the holes above the spark plugs. I have been given conflicting information, some say this means it is out of a s5 some say all turbos had these?

Directfreak

iTrader: (2)

Then drilled and tapped whole is for the knock sensor.
I don't know if it was on all turbos or just the S5 ones.

browney

o.k thanks, does any one know if it was in both or just s4 or 5?