Marine Turbo Blankets: Benefits, Limits and Getting the Fit Right

Ask about turbo blankets on any boat forum and you'll get strong opinions both ways. Some owners won't run without one; others worry about trapping heat in the turbo. Both camps have a point. This post walks through what a marine turbo blanket does, what to watch for, and what goes into a removable turbo cover that actually fits.

What a turbo blanket does

A turbocharger's exhaust (turbine) side is one of the hottest surfaces in the engine room. A turbo blanket is a removable insulation cover shaped to that housing, and often to the exhaust outlet or elbow right after it. It's there to:

• Protect people. The turbine housing sits right where hands and knees go when someone is checking the engine.

• Keep radiant heat off nearby parts. Hoses, wiring, belts and fuel lines near the turbo all live longer when they aren't baking.

• Keep heat out of the engine room. Less radiated heat makes for a more workable space.

The limits, and the honest concerns

The worries you'll hear are real, and a good turbo blanket is designed around them:

• Covering the wrong parts. A blanket belongs on the hot exhaust side. The compressor (intake) side, bearing housing oil and coolant lines, and the wastegate actuator generally shouldn't be smothered. Follow your engine manufacturer's guidance on what can and can't be covered.

• Oil soak. Insulation that soaks up oil from a leak is a fire risk on a hot surface. Fix leaks, and inspect the blanket during routine checks.

• Hiding problems. A cover can hide a cracked housing or a leaking gasket. A removable blanket that's easy to take off is what makes regular inspection realistic.

• Poor fit. A loose, generic blanket can shift, rub or sag onto parts it shouldn't touch. A made-to-measure cover stays put.

None of these are reasons to leave a turbo bare. They're reasons to get one that fits and comes off easily.

How our turbo covers are built

Every turbo cover we make is custom-fabricated in Blaine, Washington, to the turbo and outlet you send us. For high-temperature builds:

• Inner insulation: rated 1,000°F continuous (1,200°F max).

• Gray outer cloth: silicone cloth rated 450°F continuous (500°F max).

• Hot face: stainless wire mesh against the hot surface.

• Closures: stainless lacing wire, snaps or D-rings. On high-vibration marine engines, stainless lacing is the most reliable; it won't melt, stretch or shake loose.

• Cutouts and openings for mounting studs, sensors, the wastegate and anything else that needs to stay clear.

If the turbo outlet feeds into an elbow or riser, we can make matching covers for those too. See our marine exhaust insulation blankets and marine turbo blankets pages.

What to send for a turbo blanket quote

Turbos come in many shapes, so photos matter more than anything:

1. The engine make and model, and the turbo model or part number if you can read it off the tag.

2. Photos from several angles, including the turbine housing, the outlet and whatever sits close by. Clearances matter.

3. Basic measurements of the housing and outlet. Our measuring guide explains how; measure only when the engine is cold.

4. What must stay uncovered, such as sensors or the wastegate actuator.

Then the owner goes over it with you by phone or video so nothing is missed before we build. We ship nationwide, including anywhere in Alaska. We're a manufacturer only, so your mechanic or crew installs it.

FAQ

Will a turbo blanket overheat my turbo? A blanket on the turbine (exhaust) side is a common practice, but it must be the right build and must not cover parts your engine maker says to leave open. When in doubt, check with your engine dealer or mechanic, and tell us what needs to stay clear.

Can you make a blanket for an older or unusual turbo? Usually, yes. Custom fabrication from photos and measurements is exactly how we handle parts that don't have an off-the-shelf blanket.

How often should I inspect it? Look it over during routine engine checks, and any time there's been an oil or fuel leak nearby. Replace a blanket that's oil-soaked or damaged.

Get a quote for a custom turbo blanket

Send photos, the engine and turbo models and any measurements through our free quote form, call 360-383-6857 or email info@alltempsoftcovers.com.

All Temp Soft Covers · Custom removable insulation covers · Made in Blaine, WA · Shipping nationwide, including Alaska