Plastic parts in my engine?

Kinja'd!!! by "Echo51" (echo2047)
Published 10/29/2017 at 05:09

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STARS: 1


Kinja'd!!!

Kinja'd!!!

Yeah no, i’ll pass next time. On another note, i didn’t know you could get a plastic wheeled waterpump for these cars, all the ones i’ve installed/seen have been a cast metal wheel instead.

RE: earliere post on bolt in my tyre, i took them off and put others on, but now 1.5 months later they still held pressure. They’ve been properly patched up now and i hope they’re good to go from now on again!


Replies (5)

Kinja'd!!! "pip bip - choose Corrour" (hhgttg69)
10/29/2017 at 05:12, STARS: 1

that don’t look right.

:P

Kinja'd!!! "e36Jeff now drives a ZHP" (e36jeff)
10/29/2017 at 09:35, STARS: 1

Plastic on the engine parts isn’t a bad thing...as long as the right kind of plastic is used and the part is appropriate to be made of plastic. BMW started out with a plastic impeller on their water pumps for the m5x engines, but they chose the wrong plastic, and as a result, they failed much like the one in your photo. They revised the part to a metal impeller version, however, that suffered premature bearing failure issues due to the extra weight of the impeller. The 3rd, and final, revision went back to plastic, but it’s one that is much better suited for a water pump in an engine and that one has been virtually bulletproof.

Kinja'd!!! "ranwhenparked" (ranwhenparked)
10/29/2017 at 10:55, STARS: 0

Plastic in engine bays is usually a bad idea, regardless of whether it’s part of the engine or not. 90% of the issues I’ve had with my car have been from 33 year old brittle plastic.

Kinja'd!!! "If only EssExTee could be so grossly incandescent" (essextee)
10/29/2017 at 13:13, STARS: 1

BMW notoriously used a plastic impeller on the water pumps for my car. They shatter somewhere between 80-100k miles and the plastic shards ruin the rest of the cooling system.

Kinja'd!!! "Justino6969" (justino6969)
11/01/2017 at 13:55, STARS: 1

My Jetta had a plastic water pump impeller. I didn’t know such a thing existed until I pulled it out of the block (since the new pump I got with my timing belt kit was shiny gold metal).