Hi everyone,
I have an M20B25 that is currently on the stand and I am working to replace all the seals / water pump etc. before it goes in the car. I am going to try and tackle the valve stem seals and was wondering if I should change the rockers as well.
I have read a number of stories of rockers breaking and I am not sure how prevalent it is. If a rocker breaks will it likely cause more damage to the engine?
I was looking at Irelands engineering’s heavy duty rocker arms as possible preventative maintenance. The car is going to be a drift / autocross car so it will likely see a fair bit of stress. showbox speed test
M20 Rocker Issues
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ThomasEngine
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Last edited by ThomasEngine on Fri Jul 02, 2021 11:05 am, edited 2 times in total.
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tha881
- E30 Zone Regular
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- Location: Kent
General consensus is that it usually depends on how worn the rockers and camshaft are. Take a look at a brand new rocker and compare the surface to yours. Its well worth having an oil cooler fitted to keep your oil temps in the correct range.
I had one break and it didnt cause any other damage. Luckily opened the cam cover and it was a clean break with the half sat nicely in view.
I fitted a new cam and rockers (febi brand £270ish) and more importantly refitted my oil cooler to ensure the oil does out thin out too much. I removed it for more thorough oil changes but in hindsight I wish I had left it on.
I had one break and it didnt cause any other damage. Luckily opened the cam cover and it was a clean break with the half sat nicely in view.
I fitted a new cam and rockers (febi brand £270ish) and more importantly refitted my oil cooler to ensure the oil does out thin out too much. I removed it for more thorough oil changes but in hindsight I wish I had left it on.
