how much do i need to pour in a diesel 1 ton cummins

You need this one bottle for a Dodge 3500 hd. I have this one bottle in my HD Freightliner 330hp MBZ engine hauling freight (54,000 lbs cap) 6 days a week and it stopped my coolant leak in the engine bay and heater core with no blockage and no. My opinion, Many reviews say products dont work BECAUSE most people dont take care of their equipment and their vehicles are old, high mileage and no maintenance done. None of the add to a tank products are as good as replacing with new parts but thats expensive, we get it. This may or may not fix your problem but its a low cost gamble with a high probability of success. Dont listen to the negative reviews. If the problem comes back, your damage was too far gone and in need of replacement anyway.

Will this work with aluminum heads?

It works equally well with cast iron or aluminum. Great Stuff. Not a long-term solution, but it will buy you a lot of time.

Tried using alumaseal, which isn't working. will i need to flush the system before using the k-seal?

I used the HD Truck bottle on my 1998 GEO Tracker ( used 1/3 of the bottle ) of K-Seal and it worked. I have used so many to no avail. To answer your question, I must have @ least 3 to 4 other sealers in my colling system when I added K-Seal. It's been almost a year & no adverse effects having not flushed my radiator. Should I have flushed the radiator & the system? Yes, I should have.

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K-Seal ST5516 Heavy-Duty Multi-Purpose One Step Coolant Leak Repair, 16 oz, Pour and Go, Mixes with All Antifreeze, No Flushing Required

K-Seal ST5516 Heavy-Duty Multi-Purpose One Step Coolant Leak Repair, 16 oz, Pour and Go, Mixes with All Antifreeze, No Flushing Required

Product ID: 8435813

🔧One-step, no flushing needed

🚜Heavy-duty for large engines

⏱️Seals leaks in minutes

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$56.00

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Description

🚀 Seal leaks like a pro—fast, permanent, and hassle-free!

INSTANT LEAK FIX - Stop coolant leaks fast with a formula that seals holes & cracks in minutes.
EFFORTLESS APPLICATION - Shake, pour, and go—no draining or flushing required for busy pros.
UNIVERSAL COMPATIBILITY - Works seamlessly with all antifreeze types across commercial & agricultural vehicles.
ENGINEERED FOR HEAVY DUTY - Designed for large engines, from trucks to tractors, ensuring permanent repairs.
TRUSTED PROFESSIONAL GRADE - Mechanic-approved, non-corrosive, and independently tested for lasting reliability.

K-Seal ST5516 Heavy-Duty is a professional-grade, one-step coolant leak repair solution that permanently seals leaks in radiators, head gaskets, freeze plugs, and more. Compatible with all antifreeze types, it requires no draining or flushing and is engineered for heavy-duty commercial and agricultural engines. Trusted by mechanics worldwide, it delivers fast, durable repairs that extend engine life and prevent costly downtime.

Specifications

ASIN	B002BJEG3U
Best Sellers Rank	#11,469 in Automotive ( See Top 100 in Automotive ) #49 in Antifreezes & Coolants
Brand	K-Seal
Customer Reviews	4.4 4.4 out of 5 stars (1,623)
Date First Available	May 29, 2009
Is Discontinued By Manufacturer	No
Item Weight	1.19 pounds
Item model number	ST5516HD
Manufacturer	Solv-Tec
Manufacturer Part Number	ST5516
Model	ST5516HD
Product Dimensions	5.9 x 4.1 x 1.9 inches

Reviews

J**S

17.12.2025

M**S

14.08.2025

I**N

21.11.2025

A**.

21.10.2020

S**E

12.09.2020

J**K

17.03.2026

B**B

15.04.2026

T**Y

6.08.2025

N**L

15.07.2023

A**N

11.03.2022

A**R

25.06.2018

A**O

28.06.2021

M**N

23.12.2019

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