Model: WP7 / WP8
Part Number: 610800030083
Brands: Weichai Power
Engine Model: WP7, WP7H, WP8, WP8H
Engine Type: Diesel
Scope of application: medium and heavy trucks, buses, construction machinery, generator sets
Rings perform three jobs at once. They seal combustion gas, they conduct heat from the piston into the liner and they scrape oil back into the sump. On the Weichai WP7 and WP8, set 610800030083 contains two compression rings and one oil control ring per piston, sized to the piston groove geometry of these engines.
Worn rings never cause a sudden failure. Oil consumption rises, crankcase pressure builds, the breather starts to blow vapour and performance fades as combustion gas escapes past the piston. Owners frequently blame the turbo first, which is why a compression test and a blow-by check should come before any part is ordered.
The set fits WP7, WP7H, WP8 and WP8H engines in trucks, buses, loaders and generator sets. Ring size matches the piston and the bore, so confirm the piston part number and whether the engine is standard or oversize before ordering. Mixing ring sets between variants is a common cause of oil consumption after a rebuild.
The top ring is barrel faced and chrome plated to survive the highest temperature and pressure in the engine. The second ring is taper faced to improve oil scraping and support gas sealing. The oil control ring uses two chrome plated rails with an expander spring, sized for the correct radial tension.
Rings must never be filed to fit without a proper gap gauge and the correct specification. A tight gap breaks the ring when it heats; an oversized gap allows blow-by that no tuning can correct.
Oil consumption is usually the first complaint, followed by smoke at start-up and increasing crankcase pressure. On engines working at high load the symptoms appear earlier, because gas leakage grows with cylinder pressure.
If the bore has a ridge at the top of ring travel, replace the liner. New rings in a worn bore seal briefly and then fail.
Break-in decides how well the rings seal for the rest of their life. Long idling glazes the bores and prevents bedding in.
Each ring in the set has a different job and a different failure mode. The top ring sees the most heat and is the first to lose tension. The second ring works as a scraper and back-up seal, so its taper face must point the right way. The oil ring controls consumption and emissions, and its expander is often flat before the compression rings show visible wear.
Match the piston part number, the bore size and the engine rating. Standard and oversize sets look similar and cannot be interchanged. For a rebuild, order rings with liners and pistons as a matched set, which removes clearance uncertainty and shortens assembly time.
Oil that passes the rings burns in the cylinder and raises particulate emissions, which matters in markets with emission testing. A failing oil ring often shows as a slight haze under load rather than obvious smoke, so oil consumption records are a better early indicator than the exhaust.
Clean air and correct oil keep rings alive. Replace the air filter at interval, keep intake hoses sealed, use the specified oil grade and change it at the severe-duty interval. Fix overheating promptly, because heat softens ring tension and accelerates wear on the top ring.
One set covers one piston: two compression rings and one oil control ring.
Only if the bore is within specification and still shows a proper cross hatch.
Only if the measured gap requires it. Always measure in the actual bore.
Glazed bores, wrong gaps or rings fitted upside down are the usual causes.
Browse the Weichai piston and components category, and pair the rings with the WP7 and WP8 piston 610800030035 or the WP7 and WP8 cylinder liner 610800010503.
We offer OEM quality and excellent after-sales service as a complementary option. Engine brands supported include Weichai, Baudouin, Yuchai, Caterpillar, FAW Xichai, Sinotruk, Cummins and other engine parts. Specifically engine overhaul kits, pistons, cylinder liners, crankshafts, camshafts, fuel pumps, water pumps, lube pumps, injectors, and other performance parts.
If you are not sure about the part number that you need, please provide all the information you have, such as the equipment nameplate, engine nameplate or engine number, or real photos.
Rings perform three jobs at once. They seal combustion gas, they conduct heat from the piston into the liner and they scrape oil back into the sump. On the Weichai WP7 and WP8, set 610800030083 contains two compression rings and one oil control ring per piston, sized to the piston groove geometry of these engines.
Worn rings never cause a sudden failure. Oil consumption rises, crankcase pressure builds, the breather starts to blow vapour and performance fades as combustion gas escapes past the piston. Owners frequently blame the turbo first, which is why a compression test and a blow-by check should come before any part is ordered.
The set fits WP7, WP7H, WP8 and WP8H engines in trucks, buses, loaders and generator sets. Ring size matches the piston and the bore, so confirm the piston part number and whether the engine is standard or oversize before ordering. Mixing ring sets between variants is a common cause of oil consumption after a rebuild.
| We Are 30 Years Diesel Engine Parts Supplier | |
| Brand | EPID |
| Warranty | 12 Months |
| Condition | 100%New |
| More Models | Weichai: WP7, WP7H, WP8, WP8H, and other Weichai series. |
| Shipping | By sea / air / express (DHL, FEDEX, TNT, UPS, EMS) |
| Packing | Standard exporting packing or as required |
| Payment Term | L/C, T/T, Western Union, Trade Assurance |
| Delivery Time | 3-7 days (depend on order) |
| Selling Point | 1. On-time Delivery 2. Genuine Quality Assurance 3. Professional Supplier |
The top ring is barrel faced and chrome plated to survive the highest temperature and pressure in the engine. The second ring is taper faced to improve oil scraping and support gas sealing. The oil control ring uses two chrome plated rails with an expander spring, sized for the correct radial tension.
Rings must never be filed to fit without a proper gap gauge and the correct specification. A tight gap breaks the ring when it heats; an oversized gap allows blow-by that no tuning can correct.
Oil consumption is usually the first complaint, followed by smoke at start-up and increasing crankcase pressure. On engines working at high load the symptoms appear earlier, because gas leakage grows with cylinder pressure.
If the bore has a ridge at the top of ring travel, replace the liner. New rings in a worn bore seal briefly and then fail.
Break-in decides how well the rings seal for the rest of their life. Long idling glazes the bores and prevents bedding in.
Each ring in the set has a different job and a different failure mode. The top ring sees the most heat and is the first to lose tension. The second ring works as a scraper and back-up seal, so its taper face must point the right way. The oil ring controls consumption and emissions, and its expander is often flat before the compression rings show visible wear.
Match the piston part number, the bore size and the engine rating. Standard and oversize sets look similar and cannot be interchanged. For a rebuild, order rings with liners and pistons as a matched set, which removes clearance uncertainty and shortens assembly time.
Oil that passes the rings burns in the cylinder and raises particulate emissions, which matters in markets with emission testing. A failing oil ring often shows as a slight haze under load rather than obvious smoke, so oil consumption records are a better early indicator than the exhaust.
Clean air and correct oil keep rings alive. Replace the air filter at interval, keep intake hoses sealed, use the specified oil grade and change it at the severe-duty interval. Fix overheating promptly, because heat softens ring tension and accelerates wear on the top ring.
Browse the Weichai piston and components category, and pair the rings with the WP7 and WP8 piston 610800030035 or the WP7 and WP8 cylinder liner 610800010503.
One set covers one piston: two compression rings and one oil control ring.
Only if the bore is within specification and still shows a proper cross hatch.
Only if the measured gap requires it. Always measure in the actual bore.
Glazed bores, wrong gaps or rings fitted upside down are the usual causes.
EPID supplies diesel engine parts for Weichai, Baudouin, Yuchai, Caterpillar, Sinotruk, FAW Xichai and Cummins engines. Every order is checked against the original part number before packing, and our team can identify a part from a photo of the engine plate. Ask for a quotation with your model and quantity and we will reply within one working day.
