CVVT – What They Do & Why

Cvvt Hub

The CVVT job — burn off environmentally bad gasses produced in the first minute or so from a cold engine. CVVT technology superseded fussy air pumps after it matured enough to be a dependable component of passenger cars. See Wikipedia’s CVVT page. See MVS’s how to change the CVVT hub on P2 Volvos. See all […]

Set Timing Volvo B5254T3

Set Timing S40 V40

Need to set timing on a Volvo B5254T3 engine? Here’s the DIY and deep VVT (variable valve timing) explanation from MVS Volvo Forums wizards Rick and Jimmy: RickHaleParker » The reason I had the impression that there was no VVT adjustment is because there are no specific VVT alignment procedures in VIDA 2014D. However after reading […]

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 […]

Volvo XC70 & V70 XC

The Volvo XC70 & V70 XC - all three generations

The XC70 and V70 XC have been the heart and the workhorse of Volvo’s car/crossover offerings for just over 20 years. The formula still works today for dozens of automakers: take a FWD car and make it AWD, with slight off road capability.  It targets owners who want a safe AWD car capable of tackling […]

Several Cold Weather-Related Problems, Fixes

Cold

So your battery might be old but you’re not sure exactly its age, and the temperature might be around Absolute Zero. You turn the Volvo key a bit, saying a prayer… With record cold temperatures on the US east coast this week, now’s a good time for a topic on how to deal with very cold […]

History of the Volvo 5 Cylinder: Part 2

History Of The Volvo 5 Cylnder Engine Part 2 -

Don’t miss History of the Volvo 5-Cylinder Engine, Part 1. The inline 5 (I5) cylinder engine has come to be a symbol of Volvo’s recent past. But did you know that manufacturers started whipping up first iterations of this quirky engine as early as the 1930s? While in the US we gave up on the […]

Crank Marks — The EASY Way to Line Them Up for Timing Belt

Line Up Crank Marks

Yesterday longtime MVS Contributor and Volvo DIY author cn90 posted a method to avoid the headache of lining up crank marks when you’re replacing a timing belt on a Volvo 5-cylinder engine. I just did the timing belt, WP, etc. on my 2005 XC90 2.5T with 110K miles. I just came up with a nice […]

History of the Volvo 5 Cylinder

History Of The Volvo 5 Cylnder Engine1 -

Volvo’s history is intrinsically intertwined with the 5-cylinder engine. More than any other auto maker (besides maybe Audi), Volvo’s name has become almost synonymous with this rather idiosyncratic engine over the last 30 years. At the time, it was a perfect compromise between the 6-cylinder’s power and the 4-cylinders size and efficiency. Of course, time […]

DIY It… Homebrew Seafoam

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 […]

DIY: 1998 Volvo S70 GLT Heater Core, Heater Hoses

We have several heater core / hoses documented repairs, but this guide by CN90 is so good there’s no sense in not including it. It’s really good. Here’s a few related posts: Swedish Car Parts Heater Core Review heater core junction block bypass DIY Volvo S80 heater core DIY? In the thread below, songzunhuang discussed replacing the […]

How to Diagnose White Smoke on a 5-Cylinder Volvo

How to diagnose head gasket? Valve guides? Bad turbo? when you’re seeing white smoke in exhaust. Today we look at how to diagnose white smoke when decelerating from a 2002 XC70. MVS Volvo Forums member 1bigb1: Need some advice ,do I look at my Turbo OR do I look at my Head ? I have […]