2004 V70 2.5T with 104K miles – Engine Sludge

Engine Sludge -

cn90 »  The car is 2004 V70 2.5T with 104K miles. All maintenance up-to-date (Timing Belt at 95K, PCV etc.). Car was serviced exclusively at Volvo dealer. I am the 3rd owner. – Car has slight lifter noise (more than my 2005 XC90 2.5T with 115K, which has exactly the same engine), but overall runs fine, good […]

DIY It… Homebrew Seafoam


MVS Contributor Mecheng posts how to make your own formula to approximate DIY Seafoam. You can make Seafoam treatment much cheaper than buying it. This is the reference I used but to simplfy it and give you more info: Typical Seafoam application is 473mL Therefore for a 4:2:1 ratio 270 ml Diesel 135 ml Coleman […]

Amsoil Power Foam

Longtime MVS Forums member Geevs asks about Amsoil’s Power Foam intake & combustion cleaner, and gets many good responses and alternatives. MVS Contributor kcodyjr… Sucking something in through the manifold causes the engine to stall, and the chemical sits on the pistons and rings. You let it sit, then start it up to burn it off. […]

Save Money on Seafoam and Harbor Freight Products

Here are links to a couple recent topics that will help save you money: 25% off Harbor Freight products — it’s only good for Easter Sunday — but it works in stores, on the phone, and on their Web site. The fine print. This could save you a buch if you’ve been waiting on a big HF […]

Seafoam HowTo Pictorial Followup

How To Use Seafoam P2 -

Using Seafoam on P2 Volvos like S60, V70, XC70 If you’ve looked at my How to Use Seafoam tutorial, you’ve probably noticed that the subject car is my 1997 850 that has a convenient vacuum tree, useful for sucking the Seafoam into the intake (or easily adding a boost gauge). But 2001+ Volvos don’t have […]

How to Use Seafoam

How To Use Seafoam -

How to Add Seafoam to your Engine This is a step-by-step tutorial with photos on what to do with that can of Seafoam you just bought. Do you have a 2001+ V70, XC70, S60? The intake is different. You’ll want to use How to Use Seafoam on a 2001+ Volvo. I did the traditional 1/3 in […]

Seafoam Instructions, The Official

The “definitive” answer… from Jim Davis at Seafoam. He sent me three technical bulletins as well as confirming in his email that it can be used as a pre-cleaner before an oil change, as well as after-care for fresh oil between oil changes… in a gas engine. I am cutting and pasting the first bulletin so all can see.

Seafoam Doesn’t Work

seafoam 01

Just did a Seafoam treatment on my 94 850 NA. Sucked it through the intake tree into manifold, let sit 15 min., started it back up. Tons of smoke, and a horrible clicking/knock from the engine. Drove it a few miles, until smoke subsided, but knocking continued.