help 4g15 twin cam

giles · Postby **giles** » November 29th, 2012, 2:46 pm

guys

need some help i have a 4g15 twin cam engine and there's A continuous tap in the head like when ur tap-ids needs adjusting

anybody have any idea how to stop this

Postby **MISHI** » November 29th, 2012, 8:24 pm

U need new ones... All DOHC mitsu engines suffer this at some point and it's called lash adjusters...

These pretty much self adjust the valve clearance that U once had to do with a feeler gauge. But consider that these engines have done many miles and many years at that and they are a mechanical part that wears over time so the valve doesn't open as is should.

Some use oil addatives, some change to different body or quality of oil etc but no matter what is done it will return. I constantly get people asking if it's piston slap the way it sounds...

As said the only viable solution is to have them replaced. U need 16 of course but I dunno who sells them here other that probably the dealership in Japan.

giles · Postby **giles** » November 30th, 2012, 8:11 am

thanks bro
i guess they will remain tapping away lol

Morpheus · Postby **Morpheus** » December 2nd, 2012, 2:11 am

Are the 4G15 DOHC lash adjusters self adjusting?

Because the CK4 MIVEC which has a DOHC engine has manual valve clearance adjustment. Yup, special wrench and feeler gauges.

Postby **MISHI** » December 2nd, 2012, 11:38 am

MIVEC's valve system different: they use conventional means vs others...

Morpheus · Postby **Morpheus** » December 2nd, 2012, 5:01 pm

^^Yup. That's it

Ted_v2 · Postby **Ted_v2** » December 4th, 2012, 7:22 pm

Hope my engine dont start tapping soon na :/

Morpheus · Postby **Morpheus** » December 4th, 2012, 7:55 pm

sound boy 64 wrote:Hope my engine dont start tapping soon na :/

^^SHHHHHH!!

fds-fx · Postby **fds-fx** » March 30th, 2013, 7:16 am

Mine tapping already... lol thinking of single cam if i hadda change over wii..

star369 · Postby **star369** » April 8th, 2013, 1:13 pm

use 10 30 oil it has my engine working so much nicer i tried 20 50 once and my engine started to sound like a diesl

Postby **JUS4SHO** » April 14th, 2013, 10:26 pm

Mishi he may not have to change them just yet. Most times the issue is either the choice off filter or oil. What do you use now?
I would suggest using the sakura 1011 filter and shell helix in the blue bottle. I am sure the noise will be less and with regular oil changes it will get quieter.
There are some crazy mechanics I have heard use transmission oil and run the engine saying that the detergents in the transmission oil will clean the engine and gum off the lifters DON'T DO THIS.
That small hole that the oil needs to go thru to lub the lifters if the filter element is causing a drop in oil pressure there will be insufficient lubrication at that point. On my 100000 kmtear down to service my 4g15 the engine appeared to be new no dark spots just bright shinny metal all over. The current owner did a tear down at 215000 he said the engine still had not developed any tarnish or buildup.

Mitsubritto · Postby **Mitsubritto** » June 29th, 2015, 4:01 pm

wen i start up in the morning most times i here the loud tapping but as the car warms up it goes away.....i wud say in abt 7 mins......for some reason i was lead to believe that this is normal with this engine. anyway wud changine the engine oil really help with this?