Used Engine Block
Request a VIN-matched quote for a used Engine Block. Availability, condition, warranty, and shipping are confirmed for your exact vehicle before purchase.
- ✔ Used-part options
- ✔ Add your VIN for fitment review
- ✔ Review warranty terms in the quote
- ✔ Confirm payment method before purchase
Part Details
Your quote request is reviewed against your vehicle details. Before buying, ask for the condition description, mileage when relevant, warranty terms, shipping cost, and final price so you can compare the available options.
Quote status: Live stock and public prices are not displayed. Request a vehicle-specific quote to review the available option and its final terms.
Compatibility: Multiple makes & models
Condition & Quality Standards
Condition grading and inspection practices vary by part and source. Before purchase, request the available condition description, mileage information when relevant, photos, and any inspection or test notes.
About This Engine Block
A used engine block is the fix when the casting itself is finished: a crack in a water jacket, a spun main bearing that chewed the saddle, or a cylinder scored past what a rebore can save. Two numbers decide whether the block on offer is the right one. The casting number is moulded into the metal - on many V8s on a flange at the rear of the block near the bellhousing - and identifies the design, so every block out of that mould carries it. The stamped code is a different thing: struck into a small machined pad, unique to that individual engine, and usually carrying a plant code, a build date and a suffix describing the original application. Year, make and model cannot separate two variants out of the same mould, which is why we ask for both numbers with the VIN.
Want the full picture before you buy? Read our used engine block buying guide.
Before you order, it helps to read:
Common Signs Your Engine Block May Need Replacing
- A deep knock under load from a spun main or rod bearing
- Coolant disappearing with no external leak after an overheat
- Coolant weeping down the side of the block from a rusted core plug
- Low compression on one hole with scored or ridged cylinder walls
- Oil pressure that sags once the engine is hot
- Metallic glitter in the oil or clinging to the drain plug
Symptoms vary by vehicle and driving conditions. Always confirm diagnosis before replacement.
What to Check When Buying a Used Engine Block
- Read both numbers - the cast-in casting number and the stamped code on the machined pad
- Settle bare block vs short block; a short block already has crank, rods and pistons in it
- Ask for bore measurements at several depths for taper and out-of-round, standard or oversize
- Ask whether the walls were sonic-tested before any talk of an overbore - core shift leaves some thin
- Confirm every main cap is present, in its numbered position and facing the right way
- Ask what crack testing was done - wet magnetic particle on iron, dye penetrant on aluminium
- Plan new core plugs and a deck check while the block is out and on a stand
Ask for these details and any available photos before approving a purchase.
What Happens After You Request a Quote
- We review your vehicle and part request
- Provide your VIN or full vehicle details for fitment review
- Review the available condition, warranty, shipping, and price details
- You decide — no obligation to buy
Response time depends on the part, vehicle information supplied, and current sourcing options.
Popular Vehicles for a Used Engine Block
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Availability & Quote Details
- Live stock and public pricing are not displayed for this Engine Block
- Available condition, fitment, warranty, shipping, and final pricing are confirmed only after we review your request
- Ask for warranty and return terms in writing before you buy
- Shipping options are confirmed for the destination and part size
Check Current Availability
We do not display unverified stock records. Send your VIN or year, make, model, and original part number so a specialist can confirm exact fitment and the options currently available.
How Pricing Is Determined
Pricing for used engine block depends on several factors:
- Vehicle year, make, model, and engine configuration
- Mileage and overall condition of the donor vehicle
- Supplier location and shipping distance
- Warranty coverage offered
What is in the crate sets a block quote. A bare casting, a short block with crankshaft, rods and pistons already fitted, and an already-machined block are three different products. Bore condition is the next lever: standard, already cut oversize (which commits you to matching pistons), or still needing decking, honing or an align hone. Then how rare the casting is, whether it was crack-tested and sonic-checked, and freight on a heavy palletised part. If a core return applies it belongs in the written terms. We do not display prices: request a quote and review those terms first.
Confirm the final price and fitment basis before approving a purchase.
Frequently Asked Questions
Bare block or short block - what is the difference?
A bare block is the casting on its own: no crankshaft, no rods, no pistons. A short block is that block already fitted with the crankshaft, connecting rods and pistons, so the bottom end is assembled and the clearances set. Bare means the most work; a short block is the usual choice when your heads are good.
Casting number or stamped code - which one should I send you?
Both, plus the VIN. The casting number is moulded in and names the design, so it is shared by every block from that mould. The stamped code sits on a small machined pad, belongs to that one engine, and typically spells out plant, build date and a suffix for the original application. The casting narrows it to a family; the stamped code settles the variant.
Do the main caps have to stay with the block?
Yes. The main bearing bores are machined with the caps bolted in place, so the caps are numbered and directional and belong in their original positions. Mixing them up or turning one around leaves the bores out of round, which means binding, wiped bearings and possible crank damage. Confirm every cap is present and correctly located.
Can a used block be bored oversize again?
Only if there is wall left, and that is a measurement, not a guess. Core shift during casting means cylinder walls are not all the same thickness, so a shop sonic-tests each cylinder at several points before committing to a cut. Bores also wear egg-shaped against the thrust faces, so ask what size it is now.
Should the core plugs be replaced while it is apart?
It is cheap insurance. Core plugs seal the holes left by the sand cores used to cast the coolant passages, and the mild steel ones corrode from the coolant side until they leak. The plugs are cheap; the cost is access, since some sit behind the engine or transmission. Doing them with the block on a stand avoids that job later.
Does a used bare engine block come with cam bearings, and does it matter how they go in?
Treat cam bearings as a separate line and ask before you buy - a bare block can turn up with the old ones still pressed in, or with none. They go in as a set, and position decides whether the camshaft gets oil: the bearing's feed hole must line up with the block's drilling, and on blocks with no groove behind the bearing, one turned the wrong way starves the shaft.
Does a used block's deck have to be machined before an MLS head gasket will seal?
Often, and it is a measurement rather than a look. Original-equipment MLS gaskets want a very smooth deck, usually 20-30 Ra or less; Fel-Pro's repair MLS is coated to live with as rough as 80 Ra, and it asks 60-80 Ra on cast iron and 50-60 Ra on aluminium. Total distortion, block and head added together, is held to about 0.002 inch. Ask what the deck measures, not how it looks.
The used block is aluminium with iron cylinder liners - what if one bore is scored?
On an aluminium block with integral iron liners, a scored bore is usually a sleeving job, not an overbore: machining the original liners out and installing new ones may be the only way to save that casting. There is a limit, though - remove too much metal and there is not enough block left to support a larger dry sleeve. A fitted sleeve is then bored and plateau-honed before rings will seat.
The casting is right but it is a later-generation block - will my knock sensors fit?
Not always, and the block is where that bites. On GM's LS family the Gen III blocks carry both knock sensors in the lifter valley under the intake, on single-wire connectors, while Gen IV blocks moved them to the lower sides of the block above the pan rail with two-pin connectors - so a Gen III harness needs an adapter on a Gen IV casting. Ask which generation the casting is.
How is compatibility verified?
Provide your VIN or full vehicle details so you can review the fitment basis in your quote before approving a purchase.
What if the part does not fit?
Most suppliers offer limited return or exchange options. Warranty and return terms are confirmed before purchase.
How long does shipping take?
Shipping time varies by location, part size, and freight arrangement. Confirm the dispatch and delivery estimate in your quote.
