OVER SIZED PISTONS FOR DISCO 1

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OVER SIZED PISTONS FOR DISCO 1

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OVER SIZED PISTONS FOR DISCO 1 - 4/1/2008 12:37:55 PM

krizza91

Posts: 8
Joined: 2/25/2008
Status: offline

I just had my engine rebuilt on my 98 discovery. The machine shop bored the cylinders, and are now having a difficult time finding oversized pistons. I asked about re-sleeving and they said it would be less expensive to simply get oversized pistons. This seems to be a more difficult task than they first believed. they have called a few places here in the US and are now trying places in England.
Does anyone have any suggestions as to where I might be able to find oversized pistons?
I appreciate any advice or guidance tremendously.

Post #: 1

RE: OVER SIZED PISTONS FOR DISCO 1 - 4/1/2008 1:41:02 PM

WolfPack

Posts: 424
Joined: 1/3/2008
Status: offline

Hrm...I feel like this is something they should have checked into before boring them.

I'm assuming you needed the boring, and thus your only other option than re-boring was a new block?

_____________________________

2001 Range Rover 4.6 SE - Coil Sprung
2000 Chevy Blazer 4x4 4.3L V6 - The Beast

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Post #: 2

RE: OVER SIZED PISTONS FOR DISCO 1 - 4/1/2008 5:42:02 PM

Disco Mike

Posts: 9554
Joined: 4/27/2006
Status: offline

Your shop screwed you on this one.
Which engine do you have, a 3.9 or 4.0, how many .000 over did they bore it?

_____________________________

Mike
Retired service manager. Member of the Solihull Society, NCLR club,past member of the SCLR club and Santa Barbara 4 Wheelers.
99 D2, 3" lift, lockers, H.D. axles, 4:11 gears, Custom front and rear bumpers, Warn winch, HID lights and an Engel 45.

(in reply to WolfPack)

Post #: 3

RE: OVER SIZED PISTONS FOR DISCO 1 - 4/1/2008 7:50:31 PM

CandiMan

Posts: 140
Joined: 2/6/2008
From: Charlotte, NC
Status: offline

Are the liners removable in these engines?

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Mike L.
98 Disco 4.0

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Post #: 4

RE: OVER SIZED PISTONS FOR DISCO 1 - 4/1/2008 10:12:35 PM

krizza91

Posts: 8
Joined: 2/25/2008
Status: offline

I have the 4.0 and the liners can be "re-sleeved" for roughly $2,200 additional from my initial quote. They tell me the other option is to bore them .001 (a tenthousandth) and have oversized pistons custom manufactured. I don't know what to believe.

(in reply to CandiMan)

Post #: 5

RE: OVER SIZED PISTONS FOR DISCO 1 - 4/2/2008 11:21:57 AM

CandiMan

Posts: 140
Joined: 2/6/2008
From: Charlotte, NC
Status: offline

quote:

ORIGINAL: krizza91

I have the 4.0 and the liners can be "re-sleeved" for roughly $2,200 additional from my initial quote. They tell me the other option is to bore them .001 (a tenthousandth) and have oversized pistons custom manufactured. I don't know what to believe.

I know in the heavy duty diesel industry the piston sleeves (liners) are removeable. So I naturally assumed these engines liners were also removeable.

_____________________________

Mike L.
98 Disco 4.0

(in reply to krizza91)

Post #: 6

RE: OVER SIZED PISTONS FOR DISCO 1 - 4/2/2008 11:24:16 AM

DiscoSam2

Posts: 34
Joined: 2/4/2007
Status: offline

I had my motor rebuilt and evidently no one sells an oversized piston,I think your screwed

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Post #: 7

RE: OVER SIZED PISTONS FOR DISCO 1 - 4/3/2008 1:12:57 PM

krizza91

Posts: 8
Joined: 2/25/2008
Status: offline

do you think it would be best to just pay the money to replace the liners, or would a better option be to find a used low mileage 4.6 and install that?

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Post #: 8

RE: OVER SIZED PISTONS FOR DISCO 1 - 4/3/2008 1:37:24 PM

WolfPack

Posts: 424
Joined: 1/3/2008
Status: offline

I think your shop needs to decide that.

_____________________________

2001 Range Rover 4.6 SE - Coil Sprung
2000 Chevy Blazer 4x4 4.3L V6 - The Beast

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Post #: 9

RE: OVER SIZED PISTONS FOR DISCO 1 - 4/3/2008 3:16:14 PM

Disco Mike

Posts: 9554
Joined: 4/27/2006
Status: offline

quote:

ORIGINAL: CandiMan

Are the liners removable in these engines?

Spoke with 2 different Rover shop owners over the last 2 day and they both said, that since the engine has been bored, it is just because the current sleeve will fail when reassembled.
Don't waste ant time and money on this engine, and make the shop foot a big portion of the bill for a replacement engine. The good news is, you can drop a 4.6 short block in and come out ahead.

_____________________________

Mike
Retired service manager. Member of the Solihull Society, NCLR club,past member of the SCLR club and Santa Barbara 4 Wheelers.
99 D2, 3" lift, lockers, H.D. axles, 4:11 gears, Custom front and rear bumpers, Warn winch, HID lights and an Engel 45.

(in reply to CandiMan)

Post #: 10