my 1995 legacy EJ22 with a bad trans (made previous thread about it) keeps tapping very loud..

 

I did the metal rod stethoscope trick all over the bell housing, block and over the heads and valve covers, but it seems most noticeable at the area where the EGR valve and pipe are at on the intake. The EGR valve itself doesn't make much noise, nor does the pipe; it seems to be coming from the housing area.. but i can't see any moving parts down the two holes of the flange. Whatever it is affects performance, as it stalled yesterday on a low low idle.

 

I cleaned the EGR valve out and it did not do anything, but it seems to open up better now. Sound still remains however. Any ideas?

Thanks

meh, i listened around again and the bellhousing seems to be transmitting the noise pretty loudly as well.. this has me stumped. it doens't seem to be coming from the block or the heads as much as those two places

Er um ...

 

Disconnect one fuel injector at a time, does the noise go away or change at all?

 

How many miles?

 

If this is an auto (sorry short memory) it may be something as simple as a cracked flex plate. If the noise doesnt change with the injectors I would go with that.

yep, cracked flex plate sounds like where you're headed. check into and verify it first, that's a ton of work for a guess.

yep, cracked flex plate sounds like where you're headed. check into and verify it first, that's a ton of work for a guess.

 

 

Well if his tranny is shot anyway .....

Think I found it.

Took off the valve cover, and one Hydraulic lash adjuster is completely recessed.. there has to be a good centimeter or two gap.

 

Next question is what should i do? Take off the tower and replace it, or is there any way to pop and prime it in-situ?

THanks!

 

PS what helped me pinpiont it was putting a piece of tape on the cam sprocket and crank pulley... since the sound coincided with the cam's 1/2 speed rotation i figured it was in the valve train. Found that tip on another board and so i recommend it for any sound investigation

Edited July 8, 201114 yr by robledo

you can remove the HLA and then clean and re-prime them. if they don't ''firm up'' then it should be replaced. when it happened to me i just swapped in another rocker assembly. same work.

 

the down side to cleaning / priming and re-installing is if the oil supply is blocked it will still be bad. but then it is just time, no money to find out.