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Engine Differences
Posted: Thu Jan 28, 2021 6:43 pm
by Steve_69
I tried to research this on tech wiki and parts websites, but unable to find good answers. My car is a 68 sold as a 69 (confirmed VIN) with 1600 engine. I have almost finished dismantling the engine and was getting ready to start ordering parts. I ran the engine number (R-104808) which when looking at the list on the Rallye website, this should be a 66 engine.
Am I understanding this correctly? I realize that there are some differences, but not many. So, what should I be worried about? I am concerned about which parts I should order. I know the valve seals are different, but I believe the 68 seals fit and may be better, but I cannot confirm that. I know the water pumps are different, but we all know the many options on water pumps Other things to look out for? Thanks for any advice on this matter.
Re: Engine Differences
Posted: Thu Jan 28, 2021 7:14 pm
by devo
Looks to me like a 1970 block from the Rally website. 1970 block numbers start at 93500 and the very end of the R-16 line is at 120200. Scroll down to engine numbers:
http://datsunroadster.com/INFO_PAGES/what_year.htm
Re: Engine Differences
Posted: Thu Jan 28, 2021 7:44 pm
by C.Costine
Steve_69 wrote: Thu Jan 28, 2021 6:43 pm
I tried to research this on tech wiki and parts websites, but unable to find good answers. My car is a 68 sold as a 69 (confirmed VIN) with 1600 engine. I have almost finished dismantling the engine and was getting ready to start ordering parts. I ran the engine number (R-104808) which when looking at the list on the Rallye website, this should be a 66 engine.
Am I understanding this correctly? I realize that there are some differences, but not many. So, what should I be worried about? I am concerned about which parts I should order. I know the valve seals are different, but I believe the 68 seals fit and may be better, but I cannot confirm that. I know the water pumps are different, but we all know the many options on water pumps Other things to look out for? Thanks for any advice on this matter.
Steve, I am curious about what makes your roadster a '68?
Re: Engine Differences
Posted: Thu Jan 28, 2021 8:34 pm
by Steve_69
Thank you for the replies!
Wow, my brain put an extra digit in there or left one out! Good call. So I have a 70 block. I am thinking there is no real difference between a 68 and a 70 engine. There is no smog equipment on this car. No jet valves, etc.
VIN# SP311-18278 says it is a 68 for the way I read it, but again I could be wrong.
Re: Engine Differences
Posted: Thu Jan 28, 2021 9:20 pm
by spl310
Check the distributor to see what curve it has.
Re: Engine Differences
Posted: Thu Jan 28, 2021 9:57 pm
by greydog
Certainly possible that a non smog head was bolted to a later engine. Best to be sure the. Can you post a picture of the port side of the head looking from above as you would see it it the engine was in the car and you were looking at the carbs.
. Dan
Re: Engine Differences
Posted: Fri Jan 29, 2021 12:36 pm
by Steve_69
I believe it is a smog head that has been plugged.
Re: Engine Differences
Posted: Fri Jan 29, 2021 1:34 pm
by greydog
Correct, late model head matches engine block s/n range. You will be fine ordering parts for late model engine.
Back to C.Costines question, what makes you think it's a 68?
There are some dead giveaways. A picture of the rear, the side and the speedo/tach should tell. Possible some parts have been swapped but not likely all the differences.
Dan