I purchased a '93 Range Rover CLWB in December which had a blown head gasket. After reading on-line about the engine (of course after I purchased the vehicle) I determined it would probably be better to just buy a replacement engine so I obtained a used 4.2 and am currently rebuilding it before installing it. This is the first time I have done anything like this and had a few questions. I removed the cylinder heads, had a valve job and a 40 thousands grind done on them (thank-you for that information PT Schram) since I am replacing my head gaskets with the updated composite style gasket. A friend of mine, who is a mechanic, asked what I was doing about the lower end (main bearings and piston rings specifically) after having the heads redone because I might get some "blow-by"? What exactly does this mean and how badly will it effect the engine once it is put back together if I do indeed have "blow-by"? I purchased this vehicle for only $400 and thought I would be able to finish it fairly inexpensively but things are definitely adding up (head gaskets, new head bolts, new radiator hoses, new belts, new valley pan gaskets, new rocker cover gaskets, new oil pan gasket, and new transmission filter/gasket set...to mention a few). Can anyone explain this to me better and give me some advice? Thank-you
Frank Rorabaugh
What your friend is refering to is your piston rings and cylinder walls being worn and under the compression stroke of the engine you will have air/fuel mix "blowing by" the rings into the crank case. In simpler terms - loss of compression thereby loss of potential power. And when main bearings or connecting rod bearings fail it's game over.
Sounds like what you are curently having done is what we'd call "a head job" not a complete rebuild. I understand the frustration of spending more than intended - believe me. I'm $1200 into my $400 banger and now I get to have the radiator rodded for another 2 bills. But I did expect about 1k of work and the Rover has not dissapointed in that respect.
For my money I'd do the complete rebuild. You're most of the way there in work and probly half the way there in rebuild cost. They'll turn your crank, put in nice new bearings, bore the cylinders, new rings, new freeze pluggs, some other things I'm not thinking of now. In the end you'll regret not doing it the first time you hear low end rod knock.
Wecome to the world of rescuing Rovers!:wave:
Sounds like what you are curently having done is what we'd call "a head job" not a complete rebuild. I understand the frustration of spending more than intended - believe me. I'm $1200 into my $400 banger and now I get to have the radiator rodded for another 2 bills. But I did expect about 1k of work and the Rover has not dissapointed in that respect.
For my money I'd do the complete rebuild. You're most of the way there in work and probly half the way there in rebuild cost. They'll turn your crank, put in nice new bearings, bore the cylinders, new rings, new freeze pluggs, some other things I'm not thinking of now. In the end you'll regret not doing it the first time you hear low end rod knock.
Wecome to the world of rescuing Rovers!:wave:
I would have to agree with rlmfire. I am in the same boat purchased a 1993 LWB 4.2L for $150.00 now I have to rebuild it, I just wanted to do a top end, but I got yelled at, so now I'm rebuilding the whole thing. It's a Range Rover you can't do anything inexpensively or half A$$ed, or atleast none I have owned would let me.
Thanks for the responses. I guess I need to look into completing the job. Gotta love rovers...I often wander why I am so drawn to them
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