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Sealing guarantee. We offer cylinder head bolts (singles and sets) – stretch bolts required for every gasket replacement. Brands: Perkins, KMP Brand, Maguro, and Azeri Parts.
For engines: Perkins (1000, 1100, 400 series), JCB Dieselmax (444/Ecomax), CAT (3054/C4.4), and Isuzu.
There are 67 products.
Brand: MAGURO
1090701000
Perkins and JCB Dieselmax engines use TTY (Torque-To-Yield) bolts. They are torqued to a specific value and then turned by a certain angle, causing permanent plastic deformation (stretching). Such a bolt acts like a very strong spring, clamping down the gasket. Once removed, it is "stretched" and has lost its properties. Reusing it risks snapping or insufficient gasket clamping.
We stock high-tensile bolts (10.9, 12.9) from KMP Brand, Perkins, and Maguro:
Bolts are half the battle. You need the correct gasket (thickness selected). Check:
Yes, but sparingly. Lightly oil the threads and the underside of the bolt head with clean engine oil. Too much oil in the block hole can cause hydraulic lock and crack the block during tightening!
The tightening procedure is specific to each engine (e.g., initial torque + 90 degrees + 90 degrees). This instruction is often included with the head gasket, not the bolts.
If the block thread is damaged, thread repair (Helicoil) or block replacement might be necessary. Contact us for advice.
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