Adjustment to the BOV is made by rotating the cap. To increase the spring force on the piston, rotate the cap clockwise in the direction
of hard as marked on the top of the cap. To decrease the spring force on the piston, rotate the cap anticlockwise in the direction of soft
as marked on the top of the cap - CAUTION - Do not rotate the cap beyond the first O-Ring indicator groove.
Start with the BOV cap at the maximum soft position (The indicator O-Ring should be completely covered by the edge of the cap)
With the engine at idle the exhaust port should be closed off by the piston – the piston should be hard against the seat and not
floating or moving
Free rev the engine and back off quickly, the engine should return to normal idle speed – if the engine drops below idle or stalls
increase the spring tension by one turn
Repeat this process until the engine free revs and returns to normal idle speed
Test drive the car and ensure that when decelerating or changing gears that the engine has minimal backfiring and no stalling. If
backfiring is excessive or stalling is noticed then check all connections made during the installation, otherwise increase the spring
tension
Weld flange
V-Band clamp
MAINTAINING YOUR BOV
Spring
Cap
Swivel Nipple
Piston
Body
O-Ring seal
Turbosmart recommends that the following maintenance procedure is carried out at six monthly intervals. Regular maintenance will
ensure that your BOV is operating at its peak and will extend the working life of the product.
Remove the cap of the BOV by rotating in an anti-clockwise direction (see figure 1) – CAUTION, the cap is under spring
tension, wear safety glasses and remove with care!
Remove the piston, thoroughly clean the piston and the bore of the BOV
Inspect the surface of the piston and the bore of the BOV for scoring or excessive wear, silver coloured marks are an
indication of excessive wear
Check the Base O-ring and the Cap O-ring for any damage – replace if necessary
Lubricate the bore and the piston with Uni-Glide™, hydraulic oil or sewing machine oil (see figure 1) – DO NOT use grease or
viscous oils
Re-assemble the BOV in the reverse order
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TROUBLE SHOOTING
The following points should be checked if you find that your engine is dipping below normal idle, stalling or if the BOV is functioning
poorly. Please note, the following checks will cure 99% of problems experienced with a BOV.
Check the vacuum hose for splits, cracks, loose connection, kinking or any obstruction – old or fatigued hose may collapse under
vacuum causing an obstruction
With the engine running remove the vacuum / pressure hose from the nipple in the cap of the BOV, there should a loud hissing
sound. The engine should idle poorly, double check by covering the end of the hose with your finger. If this does not occur, the
hose could be blocked or crimped. Check the hose and replace if necessary.
Ensure that the vacuum / pressure source is not shared and that the vacuum source is directly from the inlet manifold
Check the seal between the adapter and the BOV – ensure that there is no gap between the BOV base and the weld flange
Check the join between the adapter and the intercooler pipe for leaking
DO NOT USE ANY TURBOSMART PRODUCT UNTIL YOU HAVE CAREFULLY READ
AND UNDERSTOOD THE FOLLOWING AGREEMENT.
Please call if you have any questions or do not understand this agreement. Refer to our brochure, website or catalogue for terms and conditions and further information regarding your product. Turbosmart appreciates your business and pride ourselves on
our customer service. We are always happy to offer you advice and will provide you with help in any way we can. The purpose of this agreement is to avoid any problems or hard feelings.
We sometimes make mistakes, as do our dealers, distributors and suppliers. Even customers can sometimes order the wrong parts. Do not use, modify, install, trial assemble, nick, drop, scratch or adjust any part until you first check for any damage.
Damage must be reported immediately. NO EXCEPTIONS. If there are any components missing please contact your authorised reseller immediately upon receipt of your shipment. Missing components must be reported within five (5) business days of
receipt. Parts returned for any reason MUST BE IN RESALABLE CONDITION. It is YOUR responsibility, “THE CUSTOMER” to carefully package any returns to avoid shipping damage. Insurance is highly recommended. Credit cannot be issued for
damaged goods.
Turbosmart Pty Ltd warranties the quality of the products it designs and manufactures to be free of defects in material and workmanship. This limited warranty is extended only to the original purchaser and may not be transferred or assigned. This limited
warranty applies to any product, which after careful inspection by Turbosmart Pty Ltd, after receipt of the product from our authorised reseller, is found to have a defect in either material or workmanship. Any modifications to the product will void any and all
warranties and will not be exchanged. Before installation, check new car warranty. Turbosmart Pty Ltd is not responsible for voiding any original manufactures warranty.
All warranty claims must be returned to the authorised reseller, you must return the product and sales receipt, at your own expense, accompanied by a letter stating the reason for the claim. Proof of purchase must be provided with any warranty claim and
will be verified with the authorised reseller from which the product was purchased.
If all the above procedures are followed, and the product is found to be defective in either workmanship or material, Turbosmart Pty Ltd shall either repair or replace the product, at its sole discretion, and sole cost. This limited warranty does not cover or
apply to any personal injury, labour charges or any other incidental costs or damages caused by the defective product. The individual purchaser acknowledges and agrees that the disclaimer of any liability for personal injury is a material term for this
agreement and the individual purchaser agrees to indemnify Turbosmart Pty Ltd and to hold Turbosmart Pty Ltd harmless for any claim related to the item of the equipment purchased. Under no circumstances will Turbosmart Pty Ltd be liable for any
damages or expenses by reason of use or sale of any such equipment.
THIS LIMITED WARRANTY IS THE ONLY EXPRESS WARRANTY, WHICH APPLIES TO TURBOSMART PTY LTD PRODUCT AS EXPRESSLY GIVEN IN LIEU OF ANY OTHER WARRANTY EXPRESSED OR IMPLIED, INCLUDING THAT OF
MERCHANTABILITY. ANY IMPLIED WARRANTY INCLUDING THAT OF MERCHANTABILITY AND/OR FITNESS FOR A PARTICCULAR PURPOSE IS HEREBY LIMITED BY THE SAME TERMS AND TIME LIMITATIONS SET FORTH IN THIS LIMITED
EXPRESS WARRANTY AND OTHERWISE EXCLUDED.
EXCEPT FOR THOSE OBLIGATIONS ASSUMED HEREIN, TURBOSMART PTY LTD ASSUMES NO OTHER OBLIGATIONS IN CONNECTION WITH THE SALE OF ITS PRODUCTS.
IN THE EVENT THAT THE INDIVIUDAL PURCHASER DOES NOT AGREE WITH THIS AGREEMENT THE BUYER MAY PROMPTLY RETURN THIS PRODUCT, IN A NEW AND UN-USED CONDITION, WITH A DATED PROOF OF PURCHASE, TO
THE PLACE OF PURCHASE WITHIN SIXTY (60) DAYS FROM THE DATE OF PURCHASE FOR A FULL REFUND.
THE INSTALLATION OF THIS PRODUCT INDICATES THAT THE INDIVIDUAL PURCHASER HAS READ AND UNDERSTOOD THIS AGREEMENT AND ACCEPTS ITS TERMS AND CONDITIONS.
Happy motoring!
The Turbosmart Team
Turbosmart Pty Limited P.O.Box 264 Croydon, NSW, 2132 Australia ABN: 69 081 069 794
Tel: +(612) 9740 2866 Fax: +(612) 9798 2826 Email: instructions@turbosmart.com.au
www.turbosmart.com.au www.turbosmartusa.com www.turbosmart.co.nz
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