PartSmith Co. supplies the HPS 1-1/2″ (38mm) ID, 1-3/4″ Long Blue Silicone Reinforced Coolant Cap For Bypass Heater Vacuum Valve Water Port to drivers, shops and fleets across the USA.

Inner diameter must match the fitting exactly, since eyeballing sizes is how leaks begin. Route clear of heat sources and moving components.
The long blue silicone reinforced listed here is checked against your vehicle before dispatch.
Every long blue silicone reinforced order goes through the same fitment review.
Ordering the long blue silicone reinforced takes a minute and the confirmation reaches you straight away.
Our team knows the long blue silicone reinforced well, so ask if anything about the specification is unclear.
Stock of the long blue silicone reinforced is live on this page rather than estimated.
Shops order the long blue silicone reinforced from us in volume because the data on the page is accurate.
Part details
- Material: Silicone
- Finish: Blue
- Category: Universal Hose
- Price: $30.51 with free shipping over $99
- Availability: in stock, dispatched from the USA
Manufacturer specifications
The HPS Performance 1-1/2″ (38mm) high temperature reinforced Blue silicone cap is designed specifically to be installed on your cooling system. Vacuum caps have no reinforcement and are intended for vacuum and very little pressure. The HPS reinforced silicone caps are manufactured just like our reinforced silicone radiator hoses. While traditional rubber coolant cap might crack and cause coolant leak, HPS Performance high temperature 3-ply polyester reinforced silicone caps will withstand the high temperatures and pressures of your cooling system for years to come.
HPS Reinforced Silicone Caps are compatible for use with coolant, water, air, turbocharger bypass valve ports, vacuum ports, throttle body water ports, heater cores, and much more.
Technical Specification
Product Type: Reinforced Silicone Coolant Cap
HPS Part Number: RSCC-150-BLUE
Temperature Range:- 65 deg. F to + 350 deg. F (177 deg. C)
Reinforced Layer: 3-ply Polyester
Inside Diameter: 1-1/2″ (38mm)
Color: Blue
Wall Thickness: 4mm
Inside Length: 1-3/16″
Overall Length: 1-3/4″
UV and ozone resistant
Remark: HPS reinforced silicone caps are not compatible with fuel, oil, or any petroleum-based products.
- Material: 3-Ply Reinforced Polyester Silicone
- Color: Blue
- Made of High Temperatureerature 3-ply Polyester Reinforced Silicone. Maximum Temperature Rating: 350 deg. F (177 deg. C).
- Ideal for heavy duty pressure connections and provides excellent resistance for high temperature applications
- Compatible for use with coolant, water, air, turbocharger bypass valve ports, vacuum ports, throttle body water ports, heater cores, and much more.
- Inside Diameter: 1-1/2″ (38mm). Overall Length: 1-3/4″
- HPS reinforced silicone caps are not compatible with fuel, oil, or any petroleum-based products.
Application:
HPS Reinforced Silicone Caps are Universal Fit that compatible for use with coolant, water, air, turbocharger bypass valve ports, vacuum ports, throttle body water ports, heater cores, and much more.
Remark:
Installation: Compatible with Water/Coolant ONLY, Not for Fuel/Oil
Product Content:
- 1 x Coolant Cap
The product does not come with manual/instruction, Professional Install Recommended
Cross Reference Number:
- RSCC-150-BLUE, RSCC150BLUE
Fitment questions get answered by people who work with these parts daily, usually the same business day.
Related listings: Hoses & Fittings · HPS 3.12″ (80mm) ID, 4″ Leg Long Black 4-Ply Silicone 1/2″ Offset Coupler Hose · HPS 2.25″ (57mm) ID, 6″ Leg Long Black 4-Ply Silicone 1/2″ Offset Coupler Hose · full catalog
Every parcel carries tracking that updates with each carrier scan until it reaches your door.
Independent information on this topic lives at the fuel economy maintenance guidance.
Quick answers
Will this part fit my vehicle?
The application text on this page lists what the part serves. If your vehicle is not clearly covered, send the VIN and we will rule on it before you pay.
How quickly can I get this?
Dispatch is normally the same or next business day, and heavy items travel on freight with a booked delivery window.
What is the return policy?
A straightforward returns window applies from delivery. Keep the original packaging until you have test fitted the part and contact support for a fast exchange or refund.
What quality checks does this get?
Lines and fittings are checked for pressure rating, inner diameter and ply count before shipping.
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