OUR ONLINE CHECKOUT is CLOSED and we are NOT accepting any NEW orders at this time.

We are still fulfilling and shipping previously submitted and/or delayed order requests (as product availability allows) UNTIL NOVEMBER 15th 2022.

But after November 15th, all still pending backordered unshipped items will be automatically CANCELLED **(except for any special ordered drop-shipped or made/machined-to-order items).

Our ability to respond to emails is greatly hampered by being under-staffed during this downsize transition time. But we continue to endeavor to answer email inquiries as best we can. And we will continue responding to emails through until early March 2023 because we are wholly committed to resolving any other issues that may arise from previous sales. It is still UNCERTAIN, but we may re-open a substantially downsized version of our store again in the Spring of 2023.

We sincerely appreciate your patience, understanding during this period of restructuring and/or closing. And a huge thank you to all of you whose support and loyalty we have been the beneficiary of over the 23 years that we have worked diligently to support the information and parts needs of the aircooled VW community!


  VW Parts Catalog > Engine Parts >

Oil Pressure Boost Kit (Piston and Spring) for 1961-69 SINGLE RELIEF CASE
Oil Pressure Boost Kit (Piston and Spring), for 1961-69 Single Relief Cases


 
Oil Pressure Boost Kit (Piston and Spring), for 1961-69 Single Relief Cases replaces your tired spring and worn piston. This kit is slightly stiffer than stock, for more oil pressure before bypassing. It also re-uses your current plug and gasket. With it you would re-use your current plug and gasket. Everything you need to get your oil temps normalized!

If you have a low oil pressure problem, you need to make sure the relief piston tops are FLAT (they are often not flat at all), and take a peak at the piston seating surface in the case, they are often not flat either, and either of these situations will bleed off vital oil pressure. The other thing to check is your oil pump gear clearances, and end play clearance. Blueprinting the oil pump following the methods shown in How To Hotrod Your VW Engine will maximize oil pressure at idle.
Price: $6.95


: OIL-PRESS-BOOST-SINGLE-RELIEF


QTY:
Overview
 
Oil Pressure Boost Kit (Piston and Spring), for 1961-69 Single Relief Cases replaces your tired spring and worn piston. This kit is slightly stiffer than stock, for more oil pressure before bypassing. It also re-uses your current plug and gasket. With it you would re-use your current plug and gasket. Everything you need to get your oil temps normalized!

If you have a low oil pressure problem, you need to make sure the relief piston tops are FLAT (they are often not flat at all), and take a peak at the piston seating surface in the case, they are often not flat either, and either of these situations will bleed off vital oil pressure. The other thing to check is your oil pump gear clearances, and end play clearance. Blueprinting the oil pump following the methods shown in How To Hotrod Your VW Engine will maximize oil pressure at idle.
Item Features
Here's how the stock VW oil system works. Back when the engine was designed, the only oil available was single grade oil. The engineers made a simple assumption, low oil pressure means the oil is hot. This was reasonable because oil pressure drops as it gets warmer. Maximum pressure occurs with cold oil because it is stiff and resistant to flow. Hot oil flows easily and drops pressure. So they assume that low oil pressure = hot oil, and high oil pressure equals cold oil.

There are 2 separate oil control mechanisms, the first is pressure control, which is done by the flywheel piston. When pressure is "excessive", the piston is forced down and oil pressure is relieved via a bypass port back to the sump. If you have a HUGE pump (30mm or larger), even when the piston is down it still won't bypass enough oil because the relief port is too small. So if you are careful you can increase the size if this relief port, but this is not necessary if you only use 26mm pumps like we do. Putting in a stiffer spring will increase the point at which the pressure will bypass. This usually happens with a cold engine, you can see it on the gauge when you hit the bypass point, all of a sudden the pressure drops from ~50psi to 30 for example. It will recover when the piston closes again.

The cooler relief piston operates in a similar manner, but it senses the pressure drop across the cooler. If the oil is cold, there is a lot of pressure drop across the cooler (cold oil is thick and tough to move). If the pressure drop is small, "the oil must be hot", and the piston remains closed and routes as much oil as possible to the oil cooler. Oil pressure is NOT affected by the cooler relief system, it's sole responsibility is for sending the appropriate amount of oil to the stock oil cooler. If the cooler relief spring is replaced with a stiff one, the oil will be routed to the cooler before it gets warmed up, and the engine oil will have a tough time reaching operating temperature. We feel that oil is too cold until it goes >180F, 200F is better. Anything from 200-230F is fine and nothing to worry about.

There are a lot more VWs running around "too cold" than properly warmed up, which is also why you should ALWAYS use your flaps and thermostat!


Related Items...
Hex Relief Spring Plugs, 22mm Head, PAIR
Price: $15.95
Hex Relief Spring Plugs, 22mm Head, Pair

Share your thoughts on this product with other customers...
Click here to be the first to WRITE A PRODUCT REVIEW!