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Zerostart 3100008 Engine Block Heater for Pontiac, Saab, Subaru, 36mm Thread | CSA Approved | 120 Volts | 400 Watts

3.9 out of 5 stars 36 ratings
$88.97
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Available at a lower price from other sellers that may not offer free Prime shipping.
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Purchase options and add-ons

  • Ensure quick winter starts and reduce engine wear
  • For Pontiac, Saab, Subaru. See Zero start catalogue for specific applications.
  • 36mm thread
  • 5' (1. 52m) cord included
  • Volts: 120 | Watts: 400 | Plug Type: 120 Volt, 15 Amp (Type A)
  • CSA approved
  • fit type: Vehicle Specific
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Zerostart 3100008 Engine Block Heater for Pontiac, Saab, Subaru, 36mm Thread | CSA Approved | 120 Volts | 400 Watts
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From the manufacturer

Zerostart Engine Block Heaters

Zerostart logo
About Zerostart:

With Zerostart you can maximize your uptime with innovative heating solutions. Trust Zerostart branded products to for your engine, fluid and battery warming needs.

Zerostart Engine Block Heaters

Ensure Cold Weather Starts

Engine block heaters designed and tested for each individual engine application. Several types of engine block heaters are available to meet your specific needs, including freeze plug heaters, threaded immersion heaters, plate-style heaters and cartridge heaters.

Block Heater Comparison

freeze plug v lock

V-Lock Block Heater

  • Fits directly into the frost plug port
  • Copper heating element
  • Plated steel or forged brass adapter

Threaded

Threaded Heater

  • Threads directly into the engine block
  • Copper of stainless heating element
  • Plated steel

Cartridge

Cartridge Heater

  • Heater is placed directly into a dry port of the engine
  • Quick Installation
  • No need to drain the engine coolant

Plate Bolt on

Plate/Bolt-on Heater

  • Mounts to the engine block
  • Copper heating element
  • Plated steel

Product Description

Zero start engine block heaters provide direct heat to the engine coolant or block. Phillips and Temro Industries (PTI) is a global OEM and aftermarket provider of custom engineered thermal systems and solutions.

Product information

Technical Details

Manufacturer ‎Zerostart
Brand ‎Zerostart
Model ‎Engine Block Heater for Pontiac, Saab, Subaru, 36mm Thread
Item Weight ‎12.8 ounces
Item model number ‎3100008
Exterior ‎Machined
Manufacturer Part Number ‎3100008

Additional Information

ASIN B002UNGLEO
Customer Reviews
3.9 out of 5 stars 36 ratings

3.9 out of 5 stars
Best Sellers Rank #1,380,523 in Automotive (See Top 100 in Automotive)
#41 in Automotive Replacement Tank Type Engine Heaters
Date First Available October 26, 2009

Warranty & Support

Amazon.com Return Policy:Amazon.com Voluntary 30-Day Return Guarantee: You can return many items you have purchased within 30 days following delivery of the item to you. Our Voluntary 30-Day Return Guarantee does not affect your legal right of withdrawal in any way. You can find out more about the exceptions and conditions here.
Product Warranty: For warranty information about this product, please click here

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What's in the box

  • Heater
  • 5' (1.52m) Power Cord
  • Plug Protector

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    Zerostart 3100008 Engine Block Heater for Pontiac, Saab, Subaru, 36mm Thread | CSA Approved | 120 Volts | 400 Watts
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    Price$88.97-23% $65.00
    List: $83.95    		$173.85$74.95$79.99
    Delivery
    Get it as soon as Monday, May 12
    Get it as soon as Monday, May 12
    Get it May 15 - 19
    Get it as soon as Monday, May 12
    Get it as soon as Monday, May 12
    Customer Ratings
    3.93.9 out of 5 stars36
    4.64.6 out of 5 stars80
    4.74.7 out of 5 stars11
    4.54.5 out of 5 stars234
    4.34.3 out of 5 stars147
    Sold By

    Customer reviews

    3.9 out of 5 stars
    36 global ratings

    Review this product

    Share your thoughts with other customers
    Write a customer review

    Customers say

    Customers find the engine block heater works well, with one mentioning it performs effectively in -30 temperatures. They also appreciate its ease of installation.

    AI-generated from the text of customer reviews

    Select to learn more

    4 customers mention "Functionality"4 positive0 negative

    Customers find that the engine block heater works great, with one mentioning it performs well in -30 temperatures.

    "I have one in our Subaru and it works great, but we lost the cord. I had to get the entire unit to replace the cord...." Read more

    "Worked well for two weeks, then began to fail. After a month was completely dead...." Read more

    "...Works like a champ in -30 temperatures in Alaska." Read more

    "Works great, typically last me 3 years in AK. Try to avoid over 50% glycol concentration as this seems to make them fail faster." Read more

    3 customers mention "Ease of installation"3 positive0 negative

    Customers find the engine block heater easy to install.

    "...Easy to install without leaks." Read more

    "...Was very easy to instal, though.." Read more

    "Easy install on a 1999 Subaru Legacy 2.5l engine. Gets the engine nice and warm in about an hour...." Read more

    Top reviews from the United States

    • Amazon Customer
      5.0 out of 5 stars Needed a new cord!
      Reviewed in the United States on October 14, 2017
      Verified Purchase
      I have one in our Subaru and it works great, but we lost the cord. I had to get the entire unit to replace the cord. Oh well, I guess I now have a spare.
      2 people found this helpful
      Helpful
       Report
    • Big Sky Girl
      5.0 out of 5 stars Exact Fit
      Reviewed in the United States on April 16, 2024
      Verified Purchase
      I have installed several of these over the last few decades and thankfully they remain high quality. Easy to install without leaks.
      Helpful
       Report
    • Amazon Customer
      1.0 out of 5 stars Was very easy to instal
      Reviewed in the United States on November 30, 2016
      Verified Purchase
      Worked well for two weeks, then began to fail. After a month was completely dead. Did a continuity test on it, and it was totally open (no resistance). Hopefully I just got the one in a thousand that broke quickly. Was very easy to instal, though..
      2 people found this helpful
      Helpful
       Report
    • Patch
      5.0 out of 5 stars Perfect fit
      Reviewed in the United States on December 31, 2023
      Verified Purchase
      I installed this block heater on my 2004 Subaru Impreza outback sport, EJ25 motor. Removed the freeze plug from right behind the water pump thermostat housing, on the bottom of the motor. Works like a champ in -30 temperatures in Alaska.
      Helpful
       Report
    • Ryan
      5.0 out of 5 stars Works great, typically last me 3 years in AK
      Reviewed in the United States on February 25, 2016
      Verified Purchase
      Works great, typically last me 3 years in AK. Try to avoid over 50% glycol concentration as this seems to make them fail faster.
      6 people found this helpful
      Helpful
       Report
    • Amazon Customer
      5.0 out of 5 stars Easy install on a 1999 Subaru Legacy 2
      Reviewed in the United States on August 3, 2017
      Verified Purchase
      Easy install on a 1999 Subaru Legacy 2.5l engine. Gets the engine nice and warm in about an hour. Just get a heavy-duty timer and set it to warm the engine up an hour before you start your commute. No need to waste power all night long.
      One person found this helpful
      Helpful
       Report
    • Korry
      1.0 out of 5 stars Didn’t fit 2018 Subaru Impreza.
      Reviewed in the United States on January 9, 2020
      Verified Purchase
      Didn’t fit 2018 Subaru Impreza as stated. The body hit the casting on the engine and protruded too far to plug in.
      Overall I like Zerostart products and this would be no exception had it worked for my application as stated.
      One person found this helpful
      Helpful
       Report

    Top reviews from other countries

    • Regina E.
      5.0 out of 5 stars it worked!
      Reviewed in Canada on December 9, 2021
      Verified Purchase
      works and perfectly fit for my forester 2004 jdm !
      thanks!
      Report
    • Richard Kovach
      3.0 out of 5 stars Not quite compatible
      Reviewed in Canada on March 3, 2024
      Verified Purchase
      Listed as compatible with my 2006 Outback. It is mostly, but what wasn’t obvious until reinstalling the exhaust system is that the cord will contact the very hot exhaust manifold unless it is kinked strongly 90 degrees - which is always bad for wire. And even then it is quite close to the hot manifold. Having a badly kinked cord so close to the hot manifold is a serious risk of electrical shorts and fire. It really should be supplied with the cord that has the right-angle plug on the end.
      Report
    • Carla
      5.0 out of 5 stars Fits and works
      Reviewed in Canada on March 11, 2021
      Verified Purchase
      Put this in my 2005 JDM 2.0 turbo Subaru Forster Cross Sports, super easy to install and works great!
      Report
    • Amazon Customer
      1.0 out of 5 stars Block heater
      Reviewed in Canada on July 28, 2024
      Verified Purchase
      Did not fit and had to pay 20 dollars to send back
      Report
    • Gaston
      5.0 out of 5 stars Heating as expected
      Reviewed in Canada on December 5, 2020
      Verified Purchase
      does the job very well
      Report

    Product Summary: Zerostart 3100008 Engine Block Heater for Pontiac, Saab, Subaru, 36mm Thread | CSA Approved | 120 Volts | 400 Watts

    From Zerostart

    3.9 out of 5 stars, 36 ratings

    Customer reviews

    Price

    One-time purchase: $88.97

    Purchasing options

    Other sellers

    Other sellers

    About this Item

    • Ensure quick winter starts and reduce engine wear
    • For Pontiac, Saab, Subaru. See Zero start catalogue for specific applications.
    • 36mm thread
    • 5' (1. 52m) cord included
    • Volts: 120 | Watts: 400 | Plug Type: 120 Volt, 15 Amp (Type A)
    • CSA approved
    • fit type: Vehicle Specific

    Product Description

    Zero start engine block heaters provide direct heat to the engine coolant or block. Phillips and Temro Industries (PTI) is a global OEM and aftermarket provider of custom engineered thermal systems and solutions.

    Important Information

    Proposition 65 Warning for California Consumers

    WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov

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