Its a sweet engine mate. Honest!

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spitfiremk1uk

Active Member
Posts
144
Stripped down an engine today. Described as reconditioned and one of the "sweetest engines" heard running. The idea is to rebuild it with competition in mind. The block has been rebored and crank reground with lots of new bits and cleaning done. This should be a quick rebuild and I am only stripping it to check it out. It was fitted into an efi range rover in its life previous to me and painted a rather cheap looking red. The trouble starts with 4 out of the 8 pistons being fitted into the wrong bank of cylinders. 1 cylinder head is the larger volume combustion chamber with small valves and the other a smaller volume chamber which should have larger valves but fitted with small valves that sit well below the normal hight causing cam follower pre load on one side only to be miles out. Only 1 cylinder head had cut outs for the fuel injectors the other bank must have just dribbled fuel after hitting the head! This had been "professionaly" rebuilt and with the machining costs must have cost a pretty penny. I pity the poor sod who paid for this job and whoever rebuilt this engine needs his arse kicked! And if this was a "sweet" engine I can only suggest standards are pretty low! Scratch 1 v8 and its time to strip down another one. I might even make that v8 glass table or an 8 bottle wine rack after all! Need to get rid of the damn crap red paint though. Anyone worked out what the swept volume of a rover 3.5 v8 will be at 40 thou over bore is?
 
Forgive my ignorance but pistons in wrong bore what do you mean by this? Understand the heads are mismatched but why does that make the rest of the engine scrap?

Mick
 
The pistons are handed left bank and right bank (Not all pistons are handed but these ones are). No I dont mean the con rods. The pistons have been set right on the rods, but the front 4 pistons have been fitted with their thrust side on the wrong side. Probably fine for low rpm but higher temperatures and high rpm operation reliability is now questionable.
The heads are pretty much scrap unless someone wants a single old school, small valve head. The "big" valve head has been retro fitted with the small valves and the seat cut way too low requiring new inserts as a minimum maybe new valve guides as well.

The death sentance for the block comes from corrosion in the block bores.

40 thou oversized pistons can be purchased but at a much higher cost than 20 over.

I was more making a point of how crap the "professional rebuild" was.

Thanks for the link but I will be building to a specific spec. I use Real Steel for my parts.
 
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