Looking for 4 connecting rods for my 400 being rebuilt. Rods are marked 4943A. If anyone has 4 standard size pistons or a set of 8 overbore pistons available, I'd be interested in those also. Thanks in advance. Allan
Sorry. The car is in Edmonton, Alberta. I’m more than happy to pay the shipping cost. Brian, I sent you a PM. Allan
I have these used 400 030 pistons that were made by Endurotec I got from a board member and he said he went to a forged piston. I went to a 430 piston on my build and didn’t use these rebuild . 943P they have some scuffing on walls and apear to have a small valve cut on each Piston. Pins are included $150 plus shipping if you are interested. Tony
What kind of impact would the valve reliefs have on the engine. Why would they be there? They definitely look like a good option and I’m interested.
To avoid piston to valve contact with a big duration high lift camshaft. That isn't a stock feature, rather something a PO did themselves.
I agree with what Lary states above. Looking at your Piston picture I would imagine your cylinder wall will need checked for round and probably Bored out. These may be a good option for you. I would have used these, but we bored out more and went with a 430-size piston.
The block actually had a chunk taken out of the #2 cylinder. Fortunately the water jacket wasn't damaged. The block has already been sleeved. Just looking for pistons. The valve reliefs won't effect the compression ratio and fuel dispersal?
Nope, you'll never know the difference. An increase in dish volume that small would be negligible. Devon
For those of you wondering, I bought a '69 GS400 last August. The previous owner had the car throw a rod while he was driving it to winter storage. Really was a shame as the car/engine only has 67,000 miles on the clock. Getting into the car once shipped west, there were a few contributing factors with the situation. - The previous owner had his mechanic replace the rad in the car with an aluminum rad (the OEM rad was leaking). He apparently must have bumped and disconnected the oil pressure wire when he did the rad replacement and failed to reconnect it so the PO had no warning of low oil pressure. - The oil pump assembly had been replaced on the engine. I'm assuming the mechanic used part of a shop rag to plug the ports to stop oil from draining onto him and then forgot to remove the rag. I found this on the oil pick-up screen. The perfect storm. Allan
