Compression numbers above 150

[brainhax]

Hi there,

Did compression on the Cylinders and below are the results. Truck has high mileage 580,000 K ( 360 000 miles), 1fzfe, manual gearbox

• C1:150
• C2:183
• C3:176
• C4:152
• C5:176
• C6:160

Is any engine work required based on above numbers ?

 

[SNLC]

Spread is to much as per factory specs.

Cheers

 

[brainhax]

Spread is to much as per factory specs.

Cheers

I have heard 15% difference among the cylinders should be fine. Isn't that the case?

 

[SNLC]

I have heard 15% difference among the cylinders should be fine. Isn't that the case?

No

Cheers

 

[SNLC]

I have heard 15% difference among the cylinders should be fine. Isn't that the case?

Your math also isn’t mathing

Your greatest spread is 33psi.

Cheers

 

[LongDuck]

Well, your phone is almost dead.

 

[vipergrhd]

Did you check with engine warm or cold? If you want to know if your issues with the lower compression is top or bottom end do a cold and warm compression then add some oil after to do a wet compression and see the difference in pressure. Make sure battery is fully charge or on a charger.

 

[robnicko]

before anything check and make sure your valve clearances are within spec
a tight clearance can affect #'s significantly