Hello form Greece, just rebuilding my vg30det for a cracked ringland and i want to share some info with you. I got a spare vg30dett half engine and i compared the most parts to choose the best. 1 Engine block: The blocks are identical except 2 lilte differences i found. The det has 2 lilte holes under the oil tree with a spring-ball which the dett doesnt have it. Does anyone knows what these are there for? I believe they are some kind of pressure relief??? And why the dett engine doesnt have it? Here what i mean det dett Also the dett engine block has 2 like caps at the oil return holes at the right side which det doesnt have it. i dont know what are they there for. I mean this 2 rod piston: The rods are the same but the pistons are different. The det one is marked as a 45v and the dett as 30p. The diffs i found is that the det is a litle taller at the back side and that the det is thinner at the inside side around ringlands. See what i mean det piston dett piston Now something other i tried and i managed to get the topfeed injectors of the det to get in dett's fuel rails. I done that cause my topfeed injectors are 550 and as i am now using dett heads-intake i doant have the extra money to buy new ones. Here is the photo
Those sprung balls on the DET are oil filter pressure relief valves that open if it takes too much pressure to circulate oil through the filter, which mounts directly on to the block. The plugs in the block are alternative dipstick positions I think. Looks like the DETT pistons have a wider ring land between rings one and two, a good thing. Interesting stuff.
Thanks for the reply, the plugs is at the holes which return oil from the (head???) to the sump, not for the dipstick. I cant understand why they are there and why they are only 2, and only at the right side. Can someone confirm that this is ok? Im asking cause i'll keep the det block and if it is ok i'll swap these caps there. As matters the pistons i was surprised too. they are by far wider at the inside of the ringland. if i can measure them ill get the results.
The Cima motor has the oil filter screwed directly to the block. id guess that block pisses bypassed oil directly back into the sump. The TT motor has that oil "tree" thingo bolted in place and I think youll find that the relief valves are contained within the tree assembly. This bypassed oil is then fed off to the TT oil cooler and then returns to the sump. E
You are right, i just saw that the oil tree of the tt has that valves in it. I didn't see this before cause i'm not gonna use the tree as the starter is just there where the oil filter should be. Thanks for that. Any thought for the caps?
With those blanking plugs, I could only guess without actually seeing the block in person. Im really liking how you adapted those older hosetail style top feeds into the side feed rails! THAT is a cool bit of imagination and mechanical chicanery! Top stuff! If you need a choice of different injectors, you can use top fed O-ring type injectors and just have the o-ring spigot thingy machined down to resemble the hosetail on the older type. There are many many injectors to choose from then at pretty good prices!!! L8r E
