Small crack on semi truck engine block. Epoxy glue seal.

JW Portable Welding & Repairs eliminates oil leaks by sealing small cracks on semi truck’s engine block with epoxy glue seal. This repair method provides a valuable and not very expensive option for oil leak elimination due to engine block crack. It is an alternative option aside of welding the cracked engine block. We presently handle about 24 types of different epoxy resins for a variety of applications. The epoxy adhesive seal application complements our welding services in cases where welding is not possible, not desired or simply too expensive.

Initially, we were contacted by the client to weld the crack on the diesel engine block of the large highway truck. The used truck was purchased by the client recently and after the month the oil start leaking. The initial visitation has confirmed that the “crack” has already been repaired by somebody using some kind of epoxy resin. The “cracked place” had a groove made and the epoxy used had gaps along the edges –  we have concluded that the used epoxy did not stretch. The mechanic doing the repair has told us that the leak originates from the groove.

First, we have tried to determine exactly the location of the crack. Although the groove made by somebody previously has indicated that the crack should be in the groove, but we wanted to confirm the suspicion and avoid any problems. We have tried twice to develop the crack and each time the tests failed to confirm the location of the crack in the groove. The engine block was cold, so what could happen that the crack has been shut down completely and it would open up at the temperature reaching about 100 C or the leak originates from somewhere else and the mechanic was wrong.

In such situation welding of the “crack” would be impossible since the welder cannot confirm positively the location of the crack. Moreover, we have discovered that the block has severe porosity and pitting about 15 inches below the groove. The only choice for the repair was the epoxy resin repair and if this fails the replacement of the engine block at the estimated cost of  about $42,000.00

The repair required for this crack has demanded the epoxy glue for metal to be workable on the vertical surfaces, flexible after curing, resistant to heat and with a maximum thickness of about 10 – 20 mm. The main thickness of the repair should be positioned where the groove is located and the heat resistance should be higher than 120 C due to the standard heat this engine operates in.

We have prepared and cleaned the surface and then applied the epoxy resign. The surface covered was increased significantly due to the existence of porosity and pitting which we wanted to cover. The final test performed by the mechanic indicated the leak of the dime size has accumulated after running the truck engine for 4 hours. The client was extremely happy since previously he could not cross the border due to the oil leak.

It has to be stressed out that not all engine block cracks can be sealed successfully and these cracks that cannot be sealed have to be welded up. The small slow-moving cracks in vertical and overhead positions can be sealed by our epoxy. The slow-moving crack is the crack that penetrates the block with speed about ¼ – ½ inch a year but preferably even slower than ¼ a year. Our epoxy seals could buy the owner valuable time of perhaps 2 – 4 years even for a crack that penetrates the block engine close to our maximum speed.  The fast-moving cracks, that is all cracks moving faster than ½ inch per year have to be welded up.

Our technological advantage, efficiency and effectiveness sets us apart in the industry.

For further inquiries or to book services please contact:

Darek, @ (519) 872-2552