pistons
Posted: Tue May 31, 2022 10:15 pm
ok has ANYONE seen this b4?
Datsun Roadster Forum-311s.org
The Resource For All Things Datsun Roadster S211/SPL212/310/311 Datsun Sports Roadster 1959-April 1970 circa 40,000 produced
https://www.311s.org/phpBB3/
pistons
Page 1 of 2
Re: pistons
Posted: Tue May 31, 2022 10:17 pm
quite interesting if u ask me .. Idk how this happened . went to change my head gasket and noticed these holes . or whatever they're called . .
Re: pistons
Posted: Tue May 31, 2022 10:39 pm
I'm terribly sorry to say but that engine is done. You have broken pistons, possibly from detonation (overly advanced ignition timing). You will have to rebuild the engine with new pistons. I suggest locating another used R16 if you can that is known to be good and swapping it in.
Re: pistons
Posted: Wed Jun 01, 2022 3:04 am
really ? the entire motor ? nothing is scared except for the pistons . and the timing chain and gears. and cam are all good . only 2 pistons r done .. why would I say the entire motor is gone ? I don't believe it was set too high but something happened to it for sure . detonation . maybe rings are gone too ,but they look ok so far . whatever happened . I thought it was my head gasket . bummer .Gregs672000 wrote: Tue May 31, 2022 10:39 pm I'm terribly sorry to say but that engine is done. You have broken pistons, possibly from detonation (overly advanced ignition timing). You will have to rebuild the engine with new pistons. I suggest locating another used R16 if you can that is known to be good and swapping it in.
Re: pistons
Posted: Wed Jun 01, 2022 3:07 am
this means pulling the block doesn't it ? can you remove cam from the front ? haha just hoping .Gregs672000 wrote: Tue May 31, 2022 10:39 pm I'm terribly sorry to say but that engine is done. You have broken pistons, possibly from detonation (overly advanced ignition timing). You will have to rebuild the engine with new pistons. I suggest locating another used R16 if you can that is known to be good and swapping it in.
Re: pistons
Posted: Wed Jun 01, 2022 3:18 am
AND HEY EVERYONE . ITS BEEN A WHILE . I've been doing new things . driving my Datsun like crazy . until now that is .. ugh .
Re: pistons
Posted: Wed Jun 01, 2022 7:50 am
Hey Lorna! We've missed you! Sorry this news is unfortunate and hope you can get back up and running soon.
Re: pistons
Posted: Wed Jun 01, 2022 8:11 am
Ouch!
Greg is right. The engine requires a full rebuild. That damage would have spread metal pieces/shavings throughout the entire engine. Strange though, based on the location and size of the ‘holes’ (more on the sides and not in the center and somewhat symmetrical), I would have suspected the damage was perhaps caused by part of a valve letting go (probably an exhaust valve) or maybe even a screw or something similar being sucked into the combustion chamber
You didn’t find anything else?
Greg is right. The engine requires a full rebuild. That damage would have spread metal pieces/shavings throughout the entire engine. Strange though, based on the location and size of the ‘holes’ (more on the sides and not in the center and somewhat symmetrical), I would have suspected the damage was perhaps caused by part of a valve letting go (probably an exhaust valve) or maybe even a screw or something similar being sucked into the combustion chamber
You didn’t find anything else?
Re: pistons
Posted: Wed Jun 01, 2022 11:00 am
Hey Lorna, long time! Both those pistons are toast and the cylinders at least need to be bored out to clear the scoring, then finding pistons/rings to fit might be a challenge. I agree with the others, no need to try and fix 2 cylinders. Take the motor out and rebuild it, measure the cylinder to see if they can still be used. I know of a R16 complete with tranny in Paso came out of a 68 so should be 5 main motor, a nice improvement over your 3 main. Not sure if it's for sale or not but I can find out for you if you want to go that route.
Re: pistons
Posted: Thu Jun 02, 2022 11:15 pm
PM sent.
Re: pistons
Posted: Sun Jun 05, 2022 2:12 pm
I'm thinking it's time to sell it ..bossbob wrote: Wed Jun 01, 2022 11:00 am Hey Lorna, long time! Both those pistons are toast and the cylinders at least need to be bored out to clear the scoring, then finding pistons/rings to fit might be a challenge. I agree with the others, no need to try and fix 2 cylinders. Take the motor out and rebuild it, measure the cylinder to see if they can still be used. I know of a R16 complete with tranny in Paso came out of a 68 so should be 5 main motor, a nice improvement over your 3 main. Not sure if it's for sale or not but I can find out for you if you want to go that route.
Re: pistons
Posted: Sun Jun 05, 2022 2:13 pm
I'm going to sell it now. unfortunatelyMattC wrote: Wed Jun 01, 2022 7:50 am Hey Lorna! We've missed you! Sorry this news is unfortunate and hope you can get back up and running soon.
Re: pistons
Posted: Sun Jun 05, 2022 2:13 pm
anyone want a wrecked 1600 ? haha ugh
Re: pistons
Posted: Sun Jun 05, 2022 2:14 pm
I'm putting him up for sale . I've had my fun with old rumble . I'm don't playing mechanic
Re: pistons
Posted: Sun Jun 05, 2022 2:15 pm
it's got a lot of stuff done to it. it's got the ragtop and everything if anyone wants to make a fair offer. I'm open..